Chrome user having major issues and out of ideas!

[Greg E]

fuel pressure regulator did nothing to help the issue

Not surprised.

Finally got a chance to look over your tune. Few things:

*When you experience this lean condition, what are your intake air temps? (AITs)

*Any idea what's going on with your MAF Smoothing VE table?? It's pulling a LOT of fuel at idle and adding a LOT of fuel in upper air flow ranges. This done during the dyno tune?

*The closed loop operational setting are quite a bit different than stock. Any idea why? I've never needed to change these even when tuning E85. Best to return these to stock values.

*Besides all this, have you done an intake pressure test yet?

[Greg E]

One more question. What is your injector pulse width at idle when the engine is completely warm?

[Jimvr4]

I bet I know why. ECU jumpers were set wrong and tuner tried to tune around it by using whack settings. They didn't recognize the swapped o2 signature.

[twinspoolin94]

I bet I know why. ECU jumpers were set wrong and tuner tried to tune around it by using whack settings. They didn't recognize the swapped o2 signature.

Maybe that is why when i swapped the jumpers to the correct setup, per adams instructions, I get opposite lock?

[twinspoolin94]

Not surprised.

Finally got a chance to look over your tune. Few things:

*When you experience this lean condition, what are your intake air temps? (AITs)

*Any idea what's going on with your MAF Smoothing VE table?? It's pulling a LOT of fuel at idle and adding a LOT of fuel in upper air flow ranges. This done during the dyno tune?

*The closed loop operational setting are quite a bit different than stock. Any idea why? I've never needed to change these even when tuning E85. Best to return these to stock values.

*Besides all this, have you done an intake pressure test yet?

Thanks for looking it over. i have not messed with any of the closed loop operational settings. I will retutn these to stock values, where in the rom should I be looking. All values for maf smoothing table where done on the dyno. car is running a hotwired 320 fuel pump and 850cc injectors. At the time with stock fpr at 50psi base idle. Car has been pressure tested, Ill test agian over the weekend. When I get off work tonight I will check the pulse and air temps. Thanks for the help everybody, I feel like we are getting close!

[Jimvr4]

I think you should be using a mostly stock ROM but might need changes in the idle settings with your bigger injectors. Check Gump's recent posts on setting up idle for his 1000cc on E85.

[Greg E]

Maybe that is why when i swapped the jumpers to the correct setup, per adams instructions, I get opposite lock?

Lets see a log of your "opposite lock". The closed loop settings wouldn't cause this in any way.

I'm still confused about what year car you have...

[twinspoolin94]

Lets see a log of your "opposite lock". The closed loop settings wouldn't cause this in any way.

I'm still confused about what year car you have...

one primary goes -12 and the other goes possitive +12 ill get a log for you. car is a 96. All 96's are california spec from what I have been able to find. I have a 94 as well thats what mixes everyone up with my username.

[twinspoolin94]

I think you should be using a mostly stock ROM but might need changes in the idle settings with your bigger injectors. Check Gump's recent posts on setting up idle for his 1000cc on E85.

Ill check it out, thanks!

[Chris@Rvengeperformance]

I didn't have to do ANYTHING to the closed loop settings. wish I could make it a tad leaner, but it is absolutely rock solid 875 RPM idle. The tach needle doesn't even vibrate. AFR dithers from 14.5 to 14.8.

Honestly other than the cranking IPW, post start enrichment timer, post start enrichment factor, injector scaling, injector latency compensation, the fuel map, and the timing map, I could run a 100% stock chrome rom just fine. The stock code is good for decent driveability for virtual any setup that isn't bugged mechanically. When you have to start jacking with all kinds of tables something is messed up with your setup.

There are a couple tweaks I did to idle great at a little higher speed than stock, but nothing major, and nothing the ecu won't trim out anyway. The ISCV initial position being adjusted to what the ECU lands on after idle stabilizes makes target idle faster to hit, smoother, and more stable.