doc

Just yesterday, I got the '89 definition file ($6E) from tunercat. The tables have change alot from my '87 to the '89 arap bin. Not only are there many more tables in '89, but the values are different (to be expected since '89 has no cold start fuel injector).

Main point: I have removed my cold start injector on my '87. I am looking over the '89 bin to see where and how the extra fuel is added for cold start ups.

However, I do not see a table called Basic Pulse Width Vs Load among the '89 tables. I have one for my '87.

Can someone explain where or what happened the the base fuel map in the '89 bin??????

How does the '89 ECM figure out the pulse width????? (if there is no initial fuel map)


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'87 L98 TPI IROCZ, AFR190 heads, 3.70 gears, ZZ9 cam, 2400 Art Carr TC, SLP 1 3/4" headers, SLP cat-back, no cat, no AC, no MAF screens, Accel manifold base & SuperRam, Edelbrock double roller timing chain, MSD ext coil & distributor, trans cooler, 52mm TB with airfoil, TB coolant bypass, AFPR(58psi), K&N filters, Hotchkis lowering springs, my custom chip, Lay Ind. ram air kit, SS Brakes 1LE upgrade 12" rotors dual piston calipers, 265/45R16 Kumho V700 tires.
ET 13.39sec @ 107.21mph
'90 Eagle Talon AWD, no rust thru 9 winters
'99 Camaro SS, red, 6-spd, T-tops, Mcleod clutch, Pro 5.0 shifter, MAF processor, Direct Flow airlid, K&N filter, next mod: 4.10 rear gears
313.7Hp & 320.6ft-lbf, ET 13.55sec @ 105.1mph

Desert86Roc

Have you run it yet, or are you just comparing it first to be sure? I just finished the same thing (86-89arap), and I am just going to plug it in and try it this afternoon.

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Mike Metzler (Desert86Roc)
Mike@SpeedworldMotorplex.com [*] Webmaster: SpeedWorldMotorplex.com[*] Click Here For My Racing Page[*]86 IROC 305 TPI (406 build in progress)
ET's @ 1250 ft[*] 14.28 @ 95.461 mph (uncorrected, NOS, no headers)[*] 15.365 @ 86.785 mph (uncorrected, Headers, no NOS)

[This message has been edited by Desert86Roc (edited March 20, 2001).]

doc

I still have the '87 ECM computer. What I have done is to burn a new chip based on my custom CarPro chip. I added more fuel (about 15%) for cold start-up and a little more fuel (about 10%) for WOT.

I was under the impression that you had to have the '89 ECM computer in order to use a '89 bin.

Is this true???? OR can I burn a chip based on the '89 ARAP bin and stick it into my '87 Memcal unit.

Desert86Roc

You got it. The 86 - 89 use the same ECM...the 165. There are several posts about this floating below somewhere...especially the one about "ARAP.bin, why are you MAF guys using anything else"

I modified it for my 305 (injector constants), changed the fan temps and disabled vats and burned it this morning...I will let you know how it works tonight.


See ya!

M.

[This message has been edited by Desert86Roc (edited March 20, 2001).]

GregWestphal

iTrader: (1)

The base pulse width table isn't there probably because it doesn't need to be changed. To compensate for not having the cold start injector, look at the table for Open Loop Fuel/Air %Change Vs. Coolant Temp. It should already be set up for not having the cold start injector if you started with the ARAP bin. I did the same thing as Desert86Roc by starting with this bin and changing all of the variables to match my '87 bin and going from there.

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Greg Westphal
'87 IROC 305TPI/A4

Desert86Roc

Greg,

How did it run the first time you fired it up? Just wondering what to expect. Did it take a while to "relearn" everything?

M.

MikeT 88IROC350

I also have made this swap, used many values from my ADS chip. I just pulled the fuse for the cold-start circuit, and left the connectors all plugged in.

There are 2 other tables in the $6E tdf, "crank fuel pulse width VS coolant temp" and "crank fuel pulse width multipler vs TPS". These tables seem fairly obvious. I left the values alone, and did not change any of the other tables mentioned above.

Can't wait to get it on the road!!!

I have run the car quite a bit in the garage just idling, but no road tests yet. It fired up fine and idled quite smooth.

------------------
Best ET 14.413 @95.57 without
pulling valve covers or manifolds.
Also with stock 2.77 rear end!!!

doc

MikeT and Desert86, sure would like to get your feedback on the chips mentioned above.

New Question:
Is it possible that the base fuel map exists on the '89 ARAP Eprom, but the tunercat definition file simply does not read it????

GregWestphal

iTrader: (1)

Desert86Roc, it started up and ran fine the first time I ran the '89 code. I had zero'd out the Open Loop %change to AFR table since I still had my cold start injector hooked up at the time. I had some tweaking to do to make it run better in open loop, and I'm still not done tuning the WOT fuel and spark (are we ever done with those tables?).

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Greg Westphal
'87 IROC 305TPI/A4

Desert86Roc

Doc,

Current Update: After plugging my new prom in, everything is running OK...no trouble codes. I let the vehicle warm, and relearn (have to drive on the freeway to get all the cells), and my BLM's are dropping lower that before (maybe due to the injector constant I used).

Added bonus (this didnt even occur to me before, but I just tried it and it works):

For Autoxray users...once you switch to the 89 arap code, you need to change your Xray settings to an 89 F (or 8) engine. Now instead of only 23 points of data on my 86 settings, I now have 40! Much easier to troubleshoot with more data... but this will become a moot point once I have my laptop hooked in.

ALSO... I forgot to unplug my Cold Start Injector fuse, but since the temps outside are in the 80's and the car coolant temp was at 176 when I started the vehicle...I dont think the cold start injector activated anyway.

Just looked for the fuse, but dont see one for the cold start circuit. Is it somewhere other than the fuse panel? The only things that come close are CH Inj1 and Inj2 which I was assuming were bank 1 and bank 2 of my fuel injectors... Anyone have the answer?

Thanks,

Mike

Data Now Listed In Auto Xray & What it used to list
1---Prom ID---------------Prom ID
2---Coolant Temp----------Idle Air Mtr
3---Startup Coolant Temp--Coolant Temp
4---TPS-------------------Vehicle Speed
5---Engine RPM------------Egr Duty Cycle
6---Vehicle Speed---------Engine RPM
7---02 Sensor-------------TPS
8---02 Cross Cnt----------Integrator
9---BLM-------------------02 sensor
10--BLK Cell--------------MAT
11--Int-------------------Knock
12--Idle Air--------------Block Learn
13--Desired Idle----------02 Cross Cnt
14--Engine Load-----------MAF
15--MAT-------------------Inj Pulse
16--EGR Duty--------------Learn Control
17--CCP Duty--------------Rich/Lean
18--Battery Voltage-------Loop Status
19--Fuel Pump Sens--------Park / Neutral Detected
20--Spark Advance---------Power Steering PSI High
21--Knock Sens------------EGR
22--Knock Retard----------Fan
23--Injector Pulse--------A/C Requested
24--Engine Run Time
25--Map Sensor
26--MAF
27--Battery V Hi
28--Shift Light
29--AC
30--Park/Neutral
31--4th Gear
32--AC Clutch
33--O2 Sensor Status
34--First Gear
35--CCP Purge
36--Air Divert Solenoid
37--Air Switch Sole
38--Learn Control
39--Rich/Lean
40--Loop Status

Heck, the added data alone is worth switching to the 89 Code.

[This message has been edited by Desert86Roc (edited March 21, 2001).]

MikeT 88IROC350

The fuse for the cold-start circuit is in the normal fuse panel under the dash. It is labeled "crank", and it is only a 3amp fuse. This is the only circuit that the fuse supplies power to.

Doc, if you need more feedback, just email me. I am not driving my car yet, since there still is about a foot of snow outside!!!

------------------
Best ET 14.413 @95.57 without
pulling valve covers or manifolds.
Also with stock 2.77 rear end!!!

Desert86Roc

Thanks for the fuse info...I had already unplugged the harness, but I will yank that fuse also.

gman35

is TunerCat the same as TunerPro ?? I was wondering if the files could be used on the Extreme ALDL Hardware that I am searching for the $32B bin file that I am trying to download. Thanks, Gary

Tuned Performance

iTrader: (92)

Xtreme aldl is for datalogging only. Tuner cat is different program than tuner pro but both can be used to modify a binary file.

gman35

Anyone know a place to pick up the the files for a 1987 C4 corvette for Tunerpro RT, I have been trying to get it going on my laptop. When I plug in the Extreme ALDL and I have tunerpro RT running it acknowledges it and all the tables are there. But there is no software that seems to be running. Does that happen when you plug it into the ALDL port on the Car. Thanks, Gary

Tuned Performance

iTrader: (92)

You don’t need a bin to datalog but will need a $32b adx or convert ads to adx

Tuned Performance

iTrader: (92)

Gearheadefi or tunerpro.net has the files needed to datalog

Tuned Performance

iTrader: (92)

Tunerpro.net or gearheadefi to get the ads or adx