2 UNIQ

This question is for people who are running Turbos or Forced Indunction!

Is anyone running LEAN between 3000-4000rpms?
The reason i ask this is because i have my fuel pressure set to 38psi at idle on 440cc injectors.I have my S-AFC set to +40% on 3000 to 6500rpms.I do notice it running lean and as it hits 4000rpms it kicks in harder.Now im not sure if my ECU is FRIED but i do have a back up from my 1.8L ECU.My current one in teh car is a 2.0L ECU.
Also when i launch at 3000rpms it runs lean throughout the RPM range about TWO out of 5 TIMES.
For example when i race and launch at 3000rpms and do 5 tries it runs LEAN 2 of the times.This is really Weird!!!!
I recall someone having the same probem a while back and just wanted some feedback!
Thanks!!!

2 UNIQ

BTW i have a NEW walboro 2551ph MR2 Fuel pump and Universal 1:1 ratio AEM FPR JUST INSTALLED last week!!! frown

Red

I'm wondering if your MAF sensor is damaged... Do you have a spare one of those?

2 UNIQ

I dont have a spare one sad.gif
What do you think it can be?
My machanic wanted to know if our cars with over 50% throddle open run CLOSED or OPEN LOOP!!!
Also how can you tell it the ECU is fried?

Red

You would have to try REALLY HARD to fry an ECU; and typically a fried ECU results in the car not even running. It is near-impossible for an ECU to "go bad" -- if you fry it, it's typically dead.

I still think you're having some sort of problem with your MAF sensor. Try this:

Go to your local Radio Shack or electronics parts store. Ask the person at the desk for a can of non-residue electrical component spray cleaner. Go home, remove your MAF sensor, and spray down the little filament piece inside with this electrical cleaner...

Reattach the MAF and drive around; this may fix it.

2 UNIQ

Thanks RED!
I will try this and see what happens.
Also i was thinking about another solution.Since my Low amps are set to -40% across the band and have my Fuel pressure set to 38psi at idle you think if i set it to 44psi at idle it might just fix the leaning problem betwwen 3000-4000rpms.
This also means i have to LEAN IT DOWN from 4000 to 6500rpms on my HIGH MAPS until i get it Dynoyed Tunned.
BTW,do our cars run OPEN or CLOSED LOOP after 50% Throddle OPENED?

Red

The flip point for OBD2 closed-loop versus open-loop isn't that clear cut. It depends on a few things, but I think the throttle position is around the 65% mark...

2 UNIQ

RED!
How about doing an INJECTOR PULSE WIDTH TEST.(Something like that) tongue.gif
Something can be fried inside the ECU

JAWS 021

i got a spare MAF

MaierApril

I know this is off topic. However, would my car need a fuel pressure regulator?