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Forum: DFI and ECM
09-11-2011, 05:24 PM
Replies: 29
Views: 1,774
Posted By black85vette

Re: Just need opinions and insight on ecm decision

I understand your concerns. Accel has been making this stuff for a long time and seems to have some solid technology and they are now part of the Prestolite Performance group. I will agree with...
Forum: DFI and ECM
09-11-2011, 11:14 AM
Replies: 29
Views: 1,774
Posted By black85vette

Re: Just need opinions and insight on ecm decision

Thanks Mark.

I am looking for another wideband setup. What works well with the Thruster at a good price?
Forum: DFI and ECM
09-10-2011, 09:40 PM
Replies: 29
Views: 1,774
Posted By black85vette

Re: Just need opinions and insight on ecm decision

I put a Thruster in my 85 Vette and like it a lot. The only complaint I had was that the documentation was weak, had errors and photos missing. But the tuning went well and it runs great. I have...
Forum: DFI and ECM
02-16-2011, 04:44 PM
Replies: 6
Views: 2,267
Posted By black85vette

Re: How to upgrade from HEGO to UEGO (Accel VII)?

I just used the switched 12 v output from the Accel harness / relay. Very low current to the LC1.
Forum: DFI and ECM
02-16-2011, 04:08 PM
Replies: 6
Views: 2,267
Posted By black85vette

Re: How to upgrade from HEGO to UEGO (Accel VII)?

I replaced the narrow band sensor on the driver's side with the wide band sensor that came with the LC-1.
Forum: DFI and ECM
02-16-2011, 03:49 PM
Replies: 6
Views: 2,267
Posted By black85vette

Re: How to upgrade from HEGO to UEGO (Accel VII)?

I have the Accel Thruster but I think it sets up the same way. I used an Innovate Motorsports LC-1. You have to go into the LC-1 and set up the output to the voltage range the Gen 7 wants to see,...
Forum: DFI and ECM
02-02-2011, 08:37 AM
Replies: 5
Views: 541
Posted By black85vette

Re: Scangrafix

Can't say I blame him. I have found some pretty sharp guys hanging out here. :nod:
Forum: DFI and ECM
01-31-2011, 08:38 AM
Replies: 42
Views: 2,883
Posted By black85vette

Re: Timing / advance with Accel ECM

ASE doc; the fan is controlled by the ECM. Right now I have it set low so I can eliminate the fan as part of the temperature change.

Is it even worth the effort to change fuel / timing to...
Forum: DFI and ECM
01-29-2011, 04:53 PM
Replies: 42
Views: 2,883
Posted By black85vette

Re: Timing / advance with Accel ECM

It is the stock fan and seems to move air OK. No problems keeping temp down when stopped at idle even with the AC on. Thermostat is a 180.

Have not tried increasing advance.
Forum: DFI and ECM
01-29-2011, 03:34 PM
Replies: 42
Views: 2,883
Posted By black85vette

Re: Timing / advance with Accel ECM

Out for some more testing today. Starting to go for more RPM and speed. It is now pretty good up to 75 mph under all load conditions.

I do have another question for you. This car has always,...
Forum: DFI and ECM
01-26-2011, 08:21 AM
Replies: 54
Views: 16,234
Posted By black85vette

Re: ez EFI- the install

Nice write up. F.A.S.T. gets plenty of buzz in forums and magazines. Seems to be very popular and lots of support from others who have used it. I will be watching to see how the tuning goes. I...
Forum: DFI and ECM
01-25-2011, 08:08 PM
Replies: 42
Views: 2,883
Posted By black85vette

Re: Timing / advance with Accel ECM

OK. Things are starting to come together. Had to get my brain on the right track thinking about rich / lean. I was thinking of it as the ECM and VE table worked to keep the A:F at the target...
Forum: DFI and ECM
01-25-2011, 08:15 AM
Replies: 42
Views: 2,883
Posted By black85vette

Re: Timing / advance with Accel ECM

ASE doc & Orr89RocZ;

Thanks for all the help! I saved all the data logging that I did when checking the knock. Looking at the data I see knock at about 3000 rpm / 80.5 map. ECM pulled 5...
Forum: DFI and ECM
01-24-2011, 10:43 AM
Replies: 42
Views: 2,883
Posted By black85vette

Re: Timing / advance with Accel ECM

Finally got some time and a nice day to do some more work on the timing. The VE table is looking pretty stable at this point. I made a number of runs up to about 65 mph and backed out any knock...
Forum: DFI and ECM
01-18-2011, 07:55 PM
Replies: 42
Views: 2,883
Posted By black85vette

Re: Timing / advance with Accel ECM

Back on the road and working on the timing. Only had a little more than an hour but I did get to make a couple of runs and verify that the knock sensor was working properly and I was able to log the...
Forum: DFI and ECM
01-17-2011, 10:51 PM
Replies: 42
Views: 2,883
Posted By black85vette

Re: Timing / advance with Accel ECM

Yes it will do TBI. Settings under injection type are: sequential, staggered batch, tbi and tbi dual quad. It can handle just about any model of ignition system also.

Here is a link to the...
Forum: DFI and ECM
01-15-2011, 05:01 PM
Replies: 42
Views: 2,883
Posted By black85vette

Re: Timing / advance with Accel ECM

Well ain't this the pits. Went out to do some testing. Input all the initial changes to the timing and went for a drive. It started running rough then A/F went lean. Closed loop was showing 25%...
Forum: DFI and ECM
01-14-2011, 10:03 PM
Replies: 42
Views: 2,883
Posted By black85vette

Re: Timing / advance with Accel ECM

Orr89RocZ; thanks for the tips. I am going to be trying to get my timing pretty close before a trip to the dyno. Hope to get there in the next couple of weeks.

Appreciate all the helpful...
Forum: DFI and ECM
01-13-2011, 08:12 AM
Replies: 42
Views: 2,883
Posted By black85vette

Re: Timing / advance with Accel ECM

OK. This is starting to make sense. I read through the file and looked at the graphs and it seemed somewhat familiar. I have the Gen 6 book by Ray Bohacz and it has the same graphs. Since he wrote...
Forum: DFI and ECM
01-12-2011, 06:11 PM
Replies: 42
Views: 2,883
Posted By black85vette

Re: Timing / advance with Accel ECM

Thanks for the tuning tips. You would think they would have made that part of the manual.
Forum: DFI and ECM
01-11-2011, 03:49 PM
Replies: 42
Views: 2,883
Posted By black85vette

Re: Timing / advance with Accel ECM

Yes. Owned this car for 8 years and I got tired of trying to troubleshoot a 25 year old ECM that was only made for one year, had very limited support, very limited scan tools, was prom based, and...
Forum: DFI and ECM
01-11-2011, 02:39 PM
Replies: 42
Views: 2,883
Posted By black85vette

Re: Timing / advance with Accel ECM

ASE doc; Thanks for the good info. I was not clear on the relationship of the MAP to the advance. I will check the software and see what it says.
Forum: DFI and ECM
01-10-2011, 09:34 PM
Replies: 42
Views: 2,883
Posted By black85vette

Re: Timing / advance with Accel ECM

ASE doc; I have the Accel Thruster which is like the Gen 7 but less options. I can do it like you say plus use the logging function to capture knock retard with map and rpm to see where it is...
Forum: DFI and ECM
01-10-2011, 03:24 PM
Replies: 42
Views: 2,883
Posted By black85vette

Timing / advance with Accel ECM

Been having some good success in setting up the VE table on the Accel system. It is now running well all the way up to about 4100 rpm with minimal correction to the Fuel Air Ratio in closed loop.
...
Forum: DFI and ECM
01-03-2011, 08:49 AM
Replies: 9
Views: 650
Posted By black85vette

Re: I am new to tuning, help me out on learning!

How is your basic understanding of how the ECU and sensors function?

I have found this book extremely useful:
...
Forum: DFI and ECM
01-02-2011, 02:35 PM
Replies: 7
Views: 1,105
Posted By black85vette

Re: "FAST" ecm?

The XFI looks good and features compare well to the Accel Gen VII. Lots of options and EVERYTHING can be custom tuned. I believe you have to get the ECU, the main harness, the injector harness,...
Forum: DFI and ECM
01-01-2011, 11:21 PM
Replies: 7
Views: 1,105
Posted By black85vette

Re: "FAST" ecm?

Another post going on right now has lots of info on the EZ-EFI which is a FAST system. Kind of depends on what you want to do, how much you want to put into tuning and how much you want to spend.
...
Forum: DFI and ECM
01-01-2011, 03:37 PM
Replies: 7
Views: 1,105
Posted By black85vette

Re: "FAST" ecm?

Have not used one myself but they seem to be pretty good.

http://www.fuelairspark.com/
Forum: DFI and ECM
12-31-2010, 06:54 PM
Replies: 3
Views: 1,639
Posted By black85vette

Re: ACCEL ECU communications help

Sometimes Windoze 7 tells me which port it assigned when I plug in the USB. Other times I just go into control panel / device manager / ports (com & lpt) and see which port it assigned to the Accel....
Forum: DFI and ECM
12-29-2010, 02:34 PM
Replies: 6
Views: 993
Posted By black85vette

Re: A.I.R help

I pulled the AIR system off of my 350 TPI L98 and it did not have any noticeable impact on the way it ran.
Forum: DFI and ECM
12-28-2010, 02:36 PM
Replies: 2
Views: 1,641
Posted By black85vette

Re: Accel Thruster project

Getting ready to head to the dyno in a couple of weeks. Also tweaking the A/F ratio and timing at cruise for fuel economy.

Anyone know what the max AF ratio a 350 TPI L98 can run safely at low...
Forum: Electronics
12-06-2010, 10:30 AM
Replies: 3
Views: 1,867
Posted By black85vette

Re: 1985 trans am

Looking at the diagram the common component is the headlight switch. Verify the 12v from the switch to the two relays that control the motors for each side. The third relay is an isolation relay...
Forum: Electronics
11-22-2010, 09:47 PM
Replies: 6
Views: 911
Posted By black85vette

Re: headlight problems cant find answer

Here is a link with some pics and the drawings;

http://www.flickr.com/photos/17576549@N05/sets/72157602882678033

Hope that helps
Forum: Electronics
11-22-2010, 08:42 AM
Replies: 6
Views: 3,156
Posted By black85vette

Re: Butt Connector vs Solder Joint

Bottom line is that crimp connectors will work fine most of the time if you have the right size and good quality butt connector crimped properly with the correct crimp tool set to the right depth and...
Forum: Electronics
11-21-2010, 12:57 PM
Replies: 6
Views: 911
Posted By black85vette

Re: headlight problems cant find answer

This is very similar to the early C4 Vettes. The headlights are controlled by 3 relays. One controls power and the other 2 each control one headlight. Nice thing is that you can swap the left / right...
Forum: DFI and ECM
11-19-2010, 12:48 PM
Replies: 2
Views: 1,641
Posted By black85vette

Accel Thruster project

ECM is installed and running. Basic tune is complete and now working on the higher RPM / load areas. Have not done much WOT yet.

Things I like:
Well made
Install was pretty non eventful...
Forum: DFI and ECM
11-09-2010, 03:12 PM
Replies: 8
Views: 635
Posted By black85vette

Re: Fuel pressure

Don't think so. According to Accel tech support the ECM is set to adjust for the changes to fuel pressure.
Forum: DFI and ECM
10-29-2010, 09:06 AM
Replies: 8
Views: 635
Posted By black85vette

Re: Fuel pressure

Tnx. I was in the middle of starting to tune and getting the VE table set when this thought came up and I thought it best to ask some questions and possibly avoid doing this twice.

I'll stick...
Forum: DFI and ECM
10-27-2010, 03:54 PM
Replies: 8
Views: 635
Posted By black85vette

Re: Fuel pressure

Just got this response from Tech Support at Accel:

The vacuum line is required to maintain a constant pressure drop across the injector. As the throttle is opened and manifold pressure increases,...
Forum: DFI and ECM
10-27-2010, 01:49 PM
Replies: 8
Views: 635
Posted By black85vette

Fuel pressure

I have an Accel Thruster system. Manual says to input the fuel pressure, however, with the vacuum line on the FPR the fuel pressure varies from idle to under load / acceleration. So, do I leave it...
Forum: DFI and ECM
10-25-2010, 02:25 PM
Replies: 7
Views: 683
Posted By black85vette

Re: help with efi

I had my 700R4 modified by a transmission shop to control torque converter lockup internally and eliminate ECM control. Kit was not very expensive but I don't recall how much it was.
Forum: DFI and ECM
10-25-2010, 02:13 PM
Replies: 18
Views: 6,387
Posted By black85vette

Re: What does ECM do?

The ECM provides no functions if you went carb. It does feed the digital display info about gas milage but that does not work if it is not controlling the injectors. I run a Thruster EFI system...
Showing results 1 to 42 of 42


 
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