Tuning with the EBL
#4152
SES/CIL question
If I display my Malfunction codes, I have an intermittent IAT LO (23). Pretty sure I have a loose wire. Anyway, the SES box in the WUD is not lighting up despite the MALF code. Is that because the IAT 23 MALF flag is not enabled in the BIN, or should WUD light up the SES regardless of the bin setting?
#4153
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Re: Tuning with the EBL
Only the cars have the IAT sensor. The 1st column will blink without a sensor connected. With the IAT LO 23 flag not set the code won't go any further.
The center column controls the SES/CEL light, with the 3rd column being a stored code.
RBob.
The center column controls the SES/CEL light, with the 3rd column being a stored code.
RBob.
#4154
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Re: Tuning with the EBL
What are some signs of too large injectors being used?
I am starting to believe that might be part of the issue. I just can't seem to get my fueling figured out. My learns always seem to go way to far in the corrections and never meet in the middle...Currently running 36lb injectors on my setup that's in my sig.
I just feel like I am going in circles with these VE tables and cant find the reason why. I don't have any exhaust leaks anymore and really thought I would be able to get this thing reliably drive-able.
I am starting to believe that might be part of the issue. I just can't seem to get my fueling figured out. My learns always seem to go way to far in the corrections and never meet in the middle...Currently running 36lb injectors on my setup that's in my sig.
I just feel like I am going in circles with these VE tables and cant find the reason why. I don't have any exhaust leaks anymore and really thought I would be able to get this thing reliably drive-able.
#4155
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Re: Tuning with the EBL
Too big of a fuel injector usually shows up as idle issues. As that is typically the smallest PWs are used that have a major affect on the engine.
The VE going is circles can be a fuel delivery issue. Any variance in delivery (pressure) will affect the resultant AFR.
RBob.
The VE going is circles can be a fuel delivery issue. Any variance in delivery (pressure) will affect the resultant AFR.
RBob.
#4156
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Re: Tuning with the EBL
VAFPR? What brand and have you inspected diaphragm? Will it hold pressure using a Mighty Mite? What are your DC's at cruise RPM low load low MAP? My always changing VE logs were a result of vac leak some years back. Interface at header collector to ext pice where the NB 02 sensor was located. Why 36 injectors?
#4157
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Re: Tuning with the EBL
VAFPR? What brand and have you inspected diaphragm? Will it hold pressure using a Mighty Mite? What are your DC's at cruise RPM low load low MAP? My always changing VE logs were a result of vac leak some years back. Interface at header collector to ext pice where the NB 02 sensor was located. Why 36 injectors?
I will get a datalog up once I get home. I know from memory I idle at about 4% DC and I believe ~2.7ms on the pulse width.
Far as I know there isn't a vac leak that Ive found. My WB is mounted just after the y-pipe comes into the single pipe/intermediate pipe. Practically brand new sensor with new LC-2 programmer.
I went with the 36 injectors because they were a good deal at the time and I thought they would work out ok. I knew they would be a little bit on the larger side for this build but wanted some room if I decided to do anything more with this build. They are seimens deka injectors that had just been serviced at southbay if I remember right.
#4158
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Re: Tuning with the EBL
I would hook up vac to VAFPR. I don't see how that would hurt. It will affect your VE temporarily until you have the new VE dialed in. Yes MM is a manual vac pump. 4% seems OK. 2.7 ms seems OK. From my experience anyway. Are you also using a NB 02 sensor? I never ran my NB02 that far from the header collector. Nor my WB. Both are 12 inch from header collector. I am using the NB02 and also the WB only for a separate datalog. WB not in control of A/F. Something is affecting the A/F. Again ext leak is probable cause. Been there .........!
I would lock out asynch and run synch with large injectors. Do you see both showing changing values in WU logs?
I would lock out asynch and run synch with large injectors. Do you see both showing changing values in WU logs?
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Re: Tuning with the EBL
Note that this is for a MPFI setup.
I went with the 36 injectors because they were a good deal at the time and I thought they would work out ok. I knew they would be a little bit on the larger side for this build but wanted some room if I decided to do anything more with this build. They are seimens deka injectors that had just been serviced at southbay if I remember right.
RBob.
#4160
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Re: Tuning with the EBL
The FPR should be connected to a plenum vacuum port. This is because the outlet of the injector is subject to manifold pressure. Which if not vacuum referenced will cause the injector flow rate to change as the intake manifold pressure changes.
Note that this is for a MPFI setup.
I'll bring up injector compensation data, but not sure what can be done about it. I know of no known data for Deka 36#/hr injectors.
RBob.
Note that this is for a MPFI setup.
I'll bring up injector compensation data, but not sure what can be done about it. I know of no known data for Deka 36#/hr injectors.
RBob.
#4161
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Re: Tuning with the EBL
Messed with it some this evening and didn't have much success. I did get the vacuum hooked up to the regulator. Went for a drive and I experienced some missing and what seemed like a electrical issue cutting things out. Experienced this some before and thought at the time it was due to being lean. But I'm doubting that now. Going to look into this deeper when I get some time and hopefully come up with an answer. Thinking I'm having mechanical/electrical issues that need addressed before I do any tuning.
#4163
Re: Tuning with the EBL
Update...
5.2 to 5.4 second 0-60mph are some of best times I have gotten out of the Vette.
Attached is a really crude image where I have an overlay of where I started out with the car with only a mild Compu-cam. The before image is the only one I have in terms of historical documentation- so it is not perfect. It is directional at best because the throttle stab isn't exactly the same. Regardless, the 2.87 and small cam didn't make much difference anyway you stab the throttle.
EBL and all the mods supporting the .465" IN / .488" EX cam on a 3.73 rear end has garnered a huge increase in acceleration on stock wheels, tires, and exhaust.
The car is NOT a drag racer- I just wanted it to run better and be a little quicker.
5.2 to 5.4 second 0-60mph are some of best times I have gotten out of the Vette.
Attached is a really crude image where I have an overlay of where I started out with the car with only a mild Compu-cam. The before image is the only one I have in terms of historical documentation- so it is not perfect. It is directional at best because the throttle stab isn't exactly the same. Regardless, the 2.87 and small cam didn't make much difference anyway you stab the throttle.
EBL and all the mods supporting the .465" IN / .488" EX cam on a 3.73 rear end has garnered a huge increase in acceleration on stock wheels, tires, and exhaust.
The car is NOT a drag racer- I just wanted it to run better and be a little quicker.
Last edited by CORV3TT3; 08-13-2016 at 08:34 AM.
#4164
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Re: Tuning with the EBL
Got my plug wires replaced and that helped a lot. Apparently my wires had some burns from being routed under the headers that was not visible. Ordered D.U.I. sleeved wires and got them all installed. Anyways took it for a test drive using a old tune that I remembered was a decent tune that was driveable at the time with the motor the way it was now. It was before I did the TKO 600 swap.
It is a lot better then it was before. Now I've still got a lean issue that shows up. I'm thinking its a combination of a heat soak condition and not having a true cold air intake. Just running a filter on the throttle body. As well as the correction offsets being off.
Here is my data log and the two tunes I ran during it. I switched to the test tune about half way through the datalog, right before the hard acceleration.
Datalog & Tunes.zip
Any thoughts on the datalog and changes I could make to help? Other then the obvious getting a cold air intake installed and figuring out some offsets.
It is a lot better then it was before. Now I've still got a lean issue that shows up. I'm thinking its a combination of a heat soak condition and not having a true cold air intake. Just running a filter on the throttle body. As well as the correction offsets being off.
Here is my data log and the two tunes I ran during it. I switched to the test tune about half way through the datalog, right before the hard acceleration.
Datalog & Tunes.zip
Any thoughts on the datalog and changes I could make to help? Other then the obvious getting a cold air intake installed and figuring out some offsets.
#4165
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Re: Tuning with the EBL
I've had a busy week but finally able to look closer at that datalog. You can find exactly where things go lean at about 5:03 on the run time. Which is exactly when the fan first turns on. The IAT temps start climbing almost immediately. The IAT is a plastic cage style mounted right next to the throttle body opening/filter. Accurately showing temp of whats being pulled into motor. The temps climb from about 92F to 113F in 10 seconds. Reaching 130F in about a minute.
So right now I'm pretty convinced that my lean issues are coming from the "open engine compartment air" setup I have. Currently looking into options for a cold air intake. My Ram Air II hood is opened up at the nostrils but didn't come like that. I'd like to get the cold air intake from Hawks that is made for these hoods but am worried that since mine wasn't built as an open hood that it wont fit properly.
I might try and fab up something to direct/keep the fan air from the throttle body area. Hoping to look into that this weekend. Only other option would be getting some intake tubing and connectors then routing it to drivers side fender opening. My battery isn't mounted in the drivers side due to not being an original TPI car. I might end up having to move it to that side, because running a intake tube to that side looks like it will be tight if not impossible.
So right now I'm pretty convinced that my lean issues are coming from the "open engine compartment air" setup I have. Currently looking into options for a cold air intake. My Ram Air II hood is opened up at the nostrils but didn't come like that. I'd like to get the cold air intake from Hawks that is made for these hoods but am worried that since mine wasn't built as an open hood that it wont fit properly.
I might try and fab up something to direct/keep the fan air from the throttle body area. Hoping to look into that this weekend. Only other option would be getting some intake tubing and connectors then routing it to drivers side fender opening. My battery isn't mounted in the drivers side due to not being an original TPI car. I might end up having to move it to that side, because running a intake tube to that side looks like it will be tight if not impossible.
#4166
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Re: Tuning with the EBL
You can reduce the affect the IAT has on the injector PW by changing the blend table:
IAT/CTS - Blend Filter
By increasing the value(s) the IAT has a lessor affect.
RBob.
IAT/CTS - Blend Filter
By increasing the value(s) the IAT has a lessor affect.
RBob.
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Re: Tuning with the EBL
In my data log below it is happening badly at 5:53 mark. I do see the O2 go lean. I should add that this issue is also present at idle. You can hear it stumble and what sounds like an injector clicking.
#4171
Re: Tuning with the EBL
What are some signs of too large injectors being used?
I am starting to believe that might be part of the issue. I just can't seem to get my fueling figured out. My learns always seem to go way to far in the corrections and never meet in the middle...Currently running 36lb injectors on my setup that's in my sig.
I just feel like I am going in circles with these VE tables and cant find the reason why. I don't have any exhaust leaks anymore and really thought I would be able to get this thing reliably drive-able.
I am starting to believe that might be part of the issue. I just can't seem to get my fueling figured out. My learns always seem to go way to far in the corrections and never meet in the middle...Currently running 36lb injectors on my setup that's in my sig.
I just feel like I am going in circles with these VE tables and cant find the reason why. I don't have any exhaust leaks anymore and really thought I would be able to get this thing reliably drive-able.
I chased my tail with getting the IAT and CTS bias where it needed to be for a while. Sounds like you might have the same issue from your other post.
#4172
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Re: Tuning with the EBL
Under load is higher MAP. As the throttle opens MAP drops and fuel fall out of atomization. I would add more MAP-AE and see if that increases the NB02 voltage at the area you see the issue in log. WB02's are helpful in this regard. AE throttle follower could be increased a little as well. Too much AE-TF and fuel mileage suffers
#4173
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Re: Tuning with the EBL
Minor correction...
Quite correct.
As throttle opens MAP INCREASES !! ( it's an easy mistake to make, saying the opposite of what your brain means to say )
( What ? It's just me ? )
Condensing on the manifold walls, to later evaporate and cause a rich spike on throttle lift.
Quite correct.
As the throttle opens MAP drops
( What ? It's just me ? )
and fuel fall out of atomization.
#4174
Re: Tuning with the EBL
Hi-Sorry for the noob question..but can someone explain the differance between the "program" and "read" buttons on the flash page of the WUD?
Should they have the same name?
Thanks!
Should they have the same name?
Thanks!
#4175
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Re: Tuning with the EBL
The "Read" action is used to get the calibration out of the ECM. IOW, if a hard drive crash, or a new laptop is used, this action can be used to get the current BIN from the ECM. Which then can be used to continue tuning.
RBob.
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Re: Tuning with the EBL
Pressure rises everywhere after the throttle blades, including in the cylinders.
As pressure rises, fuel condenses out. It's just physics. The question is if it matters ? Where it does, "pump shot" is intended to make up the difference in the atomized mixture. Where it really matters most, is in the spark plug gap !
Where it can be a problem, in an engine "on the edge" the excess fuel condensed between the piston and cylinder wall above the top ring, is a frequent "advantageous circumstance" for detonation, so to speak.
Like most things, there's a trade-off.
Port injection simply lessens the places the condensation can happen. ( yes, among other things )
#4178
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Re: Tuning with the EBL
I believe pump shot or AE MAP AE TPS is for the more dramatic throttle openings. AE TF is for the more gradual opening of the throttle. Both are contributors of reduced VAC increased MAP.
Makes me want reread Aaen tutorial on Mikuni carbs as to how they compensate in that regard. I left carb this year in total on my sleds
Makes me want reread Aaen tutorial on Mikuni carbs as to how they compensate in that regard. I left carb this year in total on my sleds
#4179
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Re: Tuning with the EBL
[QUOTEWhere it can be a problem, in an engine "on the edge" the excess fuel condensed between the piston and cylinder wall above the top ring, is a frequent "advantageous circumstance" for detonation, so to speak.
][/QUOTE]
Flame speed across the piston top? Residual fuel to allow detonation earlier than desired?
][/QUOTE]
Flame speed across the piston top? Residual fuel to allow detonation earlier than desired?
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Re: Tuning with the EBL
Rather ingenious, really.
Flame speed across the piston top? Residual fuel to allow detonation earlier than desired?
The cylinder and piston walls absorb enough heat that the flame never gets there, but the pressure does ! ( this why there is always some unburned hydrocarbon in the exhaust. The cat-con takes care of it )
Detonation is never desired ! The relatively slow burn of the flame front, is desired.
I presume a tighter gap to assure flame not blown out?
To have a combustible AFR in the gap. Too lean, it won't light off. Once lit, the AFR can be off by quite a bit, but in the gap it has to be close, else you get a miss.
The purpose of AE is to assure that in spite of condensation, there is some properly atomized AFR in the gap itself.
Decel enleanment is the converse, but since we are seldom concerned with making the most power when we're trying to slow down, it's primarily to preserve the life of the cat-con.
#4182
Re: Tuning with the EBL
This sounds like something I may be having a problem with. I have a 90 SCSB 2wd chevy pickup with a 5.7 and 700R4. Runs great now that Ive tuned on it awhile-even got 24MPG on a medium long trip, and, at the time, had lean cruise turned off. Anyway, Ive noticed that when cruising along in 4th gear at anywhere from 45-65 MPH, if I the road starts to rise and I give it a hair more accelerator pedal, nothing happens. As I give it more and more, it kicks into a lower gear and accelerates just fine. I know I have the torque to pull the slight rise without the kickdown, but it seems as though the computer is ignoring the TPS and not enriching the mixture enough to maintain speed or even slight acceleration. Which AE table should I address? Or is it something else I need to look at? It only seems to happen in 4th gear.
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Re: Tuning with the EBL
In your case, need much more of a data log to make any assessment.
#4185
RPM response between shifts
With a manual transmission, what IAC and/or TPS parameters can I adjust to get the RPM's to drop more quickly on clutch in? I have a problem at clutch in coming to a stop, where the RPMs take what seems like an excessive amount of time to return to the normal idle. Also, when accelerating, RPMs don't drop as I would expect when pushing the clutch in to shift.
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Re: Tuning with the EBL
Throttle Follower (TF). It is when the IAC follows the TPS% as it opens and closes. To adjust it for shifting you can limit the total TF steps, and can change the gain of the TPS% versus IAC steps.
Then as the throttle closes, there can be a delay before the IAC starts to step closed. Plus there is a decay rate that can be adjusted.
RBob.
Then as the throttle closes, there can be a delay before the IAC starts to step closed. Plus there is a decay rate that can be adjusted.
RBob.
#4187
Re: Tuning with the EBL
Throttle Follower (TF). It is when the IAC follows the TPS% as it opens and closes. To adjust it for shifting you can limit the total TF steps, and can change the gain of the TPS% versus IAC steps.
Then as the throttle closes, there can be a delay before the IAC starts to step closed. Plus there is a decay rate that can be adjusted.
RBob.
Then as the throttle closes, there can be a delay before the IAC starts to step closed. Plus there is a decay rate that can be adjusted.
RBob.
Looking for above and beyond to get some back...
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Re: Tuning with the EBL
Hard to say, in the 3005 BIN the AE - IAC opening fuel is set to 0. Being an auto the convertor has a lot to do with a stomp.
There is also launch mode (LM) SA that can be used to bring the engine up against the convertor.
It may also be going rich or going lean, adjusting the AE will tune this in.
RBob.
There is also launch mode (LM) SA that can be used to bring the engine up against the convertor.
It may also be going rich or going lean, adjusting the AE will tune this in.
RBob.
#4189
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Re: Tuning with the EBL
Forgive me if this was covered, but I didn't read all four thousand posts in this thread.
You guys running the port mod, with large high-z injectors. Say 60-120lb injectors.
On some of these injectors, like mine, the dead time is upwards of 1msec or higher. This makes it quite difficult to idle with typical double fire batch.
I'm curious how you guys are doing it - are you using single fire at idle, and double fire everywhere else or something else?
I know some members have reported sub 1msec idle pulsewidths and stable AFR at idle, but I find that hard to believe.
-- Joe
You guys running the port mod, with large high-z injectors. Say 60-120lb injectors.
On some of these injectors, like mine, the dead time is upwards of 1msec or higher. This makes it quite difficult to idle with typical double fire batch.
I'm curious how you guys are doing it - are you using single fire at idle, and double fire everywhere else or something else?
I know some members have reported sub 1msec idle pulsewidths and stable AFR at idle, but I find that hard to believe.
-- Joe
#4190
Re: Tuning with the EBL
Throttle Follower (TF). It is when the IAC follows the TPS% as it opens and closes. To adjust it for shifting you can limit the total TF steps, and can change the gain of the TPS% versus IAC steps.
Then as the throttle closes, there can be a delay before the IAC starts to step closed. Plus there is a decay rate that can be adjusted.
RBob.
Then as the throttle closes, there can be a delay before the IAC starts to step closed. Plus there is a decay rate that can be adjusted.
RBob.
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Re: Tuning with the EBL
The higher the gain the further the IAC opens. On stick vehicles I like to set the gain so that as 100% TPS is reached the IAC has reached the max allowed steps. Which can also be increased to add airflow (both max steps and max TF steps).
Then adjust the decay rates to match your shifting. A higher decay percent is a faster decay (IAC closes more quickly).
Be aware that a delay can also occur on a throttle lift. I like to set those to zero (see the 3001 BIN).
To see the available parameters open the calibration help doc. Then hit CTRL+F to open a search window, enter w/o quotes "IAC - TF " and highlight all. That will show the TF parameters.
RBob.
Then adjust the decay rates to match your shifting. A higher decay percent is a faster decay (IAC closes more quickly).
Be aware that a delay can also occur on a throttle lift. I like to set those to zero (see the 3001 BIN).
To see the available parameters open the calibration help doc. Then hit CTRL+F to open a search window, enter w/o quotes "IAC - TF " and highlight all. That will show the TF parameters.
RBob.
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Re: Tuning with the EBL
I'm still getting the hang of tuning, however I have managed to get it running decent...
One issue I'm having is related to ebl not seeing the difference between D and OD, if I flip the option it stays as OD, if I flip it back it's D no matter what.
I did a transmission rebuild right before all of this, very possible I damaged the switch. That or I have a wiring mistake.
I'll replace the switch when I have the pan off this spring and see how it goes.
Few questions
First
RBob, you mentioned a bin flasher at one point, I was thinking it would be perfect for a little security device.
Still available?
And for reading the ebl log, is there a cheat sheet for what each column relates to?
One issue I'm having is related to ebl not seeing the difference between D and OD, if I flip the option it stays as OD, if I flip it back it's D no matter what.
I did a transmission rebuild right before all of this, very possible I damaged the switch. That or I have a wiring mistake.
I'll replace the switch when I have the pan off this spring and see how it goes.
Few questions
First
RBob, you mentioned a bin flasher at one point, I was thinking it would be perfect for a little security device.
Still available?
And for reading the ebl log, is there a cheat sheet for what each column relates to?
#4194
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Re: Tuning with the EBL
What i have now is i have a wide band sensor setup and I'm trying to get the fuel mapping setup, learns plus exporting the log to a csv and reviewing sections I'm focused on and then building my ve table in the higher rpm.
What i cant find are clear definitions of the columns other than the few mentioned on RBobs site...
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Re: Tuning with the EBL
I'm still getting the hang of tuning, however I have managed to get it running decent...
One issue I'm having is related to ebl not seeing the difference between D and OD, if I flip the option it stays as OD, if I flip it back it's D no matter what.
I did a transmission rebuild right before all of this, very possible I damaged the switch. That or I have a wiring mistake.
I'll replace the switch when I have the pan off this spring and see how it goes.
One issue I'm having is related to ebl not seeing the difference between D and OD, if I flip the option it stays as OD, if I flip it back it's D no matter what.
I did a transmission rebuild right before all of this, very possible I damaged the switch. That or I have a wiring mistake.
I'll replace the switch when I have the pan off this spring and see how it goes.
RBob, you mentioned a bin flasher at one point, I was thinking it would be perfect for a little security device.
Still available?
Still available?
And for reading the ebl log, is there a cheat sheet for what each column relates to?
Start->All Programs->EBL Flash->What's Up Display Help
RBob.
#4196
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Car: 84 Corvette Z51 ("The GoCart")
Engine: 350(CFI)
Transmission: Built 700R4 w/3400RPM 9.5in stall
Axle/Gears: 3.07 (D36)
Re: Tuning with the EBL
Thanks, and there it is at the bottom!
#4197
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Car: 84 Corvette Z51 ("The GoCart")
Engine: 350(CFI)
Transmission: Built 700R4 w/3400RPM 9.5in stall
Axle/Gears: 3.07 (D36)
Re: Tuning with the EBL
I think I found my 4th gear problem...
In the wiring diagram cheat sheet(84 CFI), it lists two pins with the same wire ref
6 - C7 (third gear discrete)
22 - C7 (fourth gear discrete)
I started with the top of the cheat sheet and worked my way down, by the time I got to the end I found that 6 and 22 were the same pin so I left the third gear wire.
Should I remove third gear and replace with the 4th, or wire them together?
In the wiring diagram cheat sheet(84 CFI), it lists two pins with the same wire ref
6 - C7 (third gear discrete)
22 - C7 (fourth gear discrete)
I started with the top of the cheat sheet and worked my way down, by the time I got to the end I found that 6 and 22 were the same pin so I left the third gear wire.
Should I remove third gear and replace with the 4th, or wire them together?
#4198
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Car: check
Engine: check
Transmission: check
Re: Tuning with the EBL
There is confusion or discrepancies among the various wiring diagrams over B6 & W22. I think it may also varied among the various x-fire years.
Try it on B6 GRY/RED wire. That is for 4th gear on an auto, or 2nd gear for a manual trans.
With W22 DRK GRN being 4th gear switch for a manual trans.
That is from a GM '84 Y-Body connector pin out diagram.
RBob.
Try it on B6 GRY/RED wire. That is for 4th gear on an auto, or 2nd gear for a manual trans.
With W22 DRK GRN being 4th gear switch for a manual trans.
That is from a GM '84 Y-Body connector pin out diagram.
RBob.
#4199
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Join Date: Feb 2016
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Car: 84 Corvette Z51 ("The GoCart")
Engine: 350(CFI)
Transmission: Built 700R4 w/3400RPM 9.5in stall
Axle/Gears: 3.07 (D36)
Re: Tuning with the EBL
Here is the pin diagram from my 84 (corvette)
And I have my car up on jackstands right now, I shattered my front trans pump while having some fun, so It's coming out again.
I can do some wire traces and even run new leads while I have the drive train out.
Last edited by gibbles; 10-04-2016 at 03:02 PM.
#4200
Re: Tuning with the EBL
I made a crosswalk from RBob's wiring instructions. I have an '82 though. Left side is crossfire to EBL and right side is EBL from crossfire.
I have also cross-checked it with a few schematics to make sure it was right.
The numbers with no letter identifier are from the crossfire harness. The alphanumeric indicators are for the EBL PIN.
So, "## - X##" means "crossfire # to EBL PIN location"
NOTE: The provision for the IAT (MAT) sensor gets plumbed in by you if you elect to use one. It's not part of the standard harness.
I have also cross-checked it with a few schematics to make sure it was right.
The numbers with no letter identifier are from the crossfire harness. The alphanumeric indicators are for the EBL PIN.
So, "## - X##" means "crossfire # to EBL PIN location"
NOTE: The provision for the IAT (MAT) sensor gets plumbed in by you if you elect to use one. It's not part of the standard harness.
Last edited by CORV3TT3; 10-06-2016 at 06:09 AM.