9.6 AR at WOT Help Please - SRT Forums

taylor757 · 07-13-2008, 11:37 AM

Just got done with my turbo install GT3076 with return line kit arronneon rc750's 255 pump safc II and I can't seem to get the AR at wot higher than 9.6 my fuel pressure is set at static 40PSI and im pulling 8% in the low and 20% in the high across the board.It will idle at 14.7 all day. Also im at 20PSI. Any Ideas? Thanks

SpeedEuphoria · 07-15-2008, 05:58 AM

Just to clarify, static meaning no vac line on the regulator?

Try going lower on the FP slightly

taylor757 · 07-16-2008, 07:20 AM

Quote: Originally Posted by SpeedEuphoria

Just to clarify, static meaning no vac line on the regulator?

Try going lower on the FP slightly

Yes im running the regulator without the vac line because i was told at 20PSI its not enough power. Also I tired to lower the fuel pressure to 38 and still didnt make a difference. And at idle i even changed the fuel pressure to 25 and my AFR where still 14.7 at idle? Does that mean my regulator is bad.

HCCAFan · 07-16-2008, 07:22 AM

Cat enrichment maybe?

taylor757 · 07-16-2008, 07:42 AM

Quote: Originally Posted by HCCAFan

Cat enrichment maybe?

Whats that? Sorry Im still new at this. I dont have a cat and also i have the fouler mod

SpeedEuphoria · 07-16-2008, 11:10 AM

Quote: Originally Posted by taylor757

And at idle i even changed the fuel pressure to 25 and my AFR where still 14.7 at idle? Does that mean my regulator is bad.

in closed loop the car will compensate and still go to 14.7, at WOT it will change

NoisufnoC · 07-16-2008, 11:13 AM

same kind of thing happened to me. i couldn't pull enough fuel on the DTEC to get my AFRs in an acceptable range without knocking on pump. I went to SCT flash to fix the problem. You could get smaller injectors

taylor757 · 07-16-2008, 02:56 PM

Quote: Originally Posted by NoisufnoC

same kind of thing happened to me. i couldn't pull enough fuel on the DTEC to get my AFRs in an acceptable range without knocking on pump. I went to SCT flash to fix the problem. You could get smaller injectors

Thats strange I have a few friends around the area running the same set-up just higher boost and 1:1 with boost source and pulling about 5% to 8%. Is there a way to test the aftermarket fuel pressure regulator or the safc. It seems to be whatever I do its still 9.6 AFR WOT. Also im throwing a P0172 code System Too Rich (Bank 1)

HCCAFan · 07-18-2008, 08:58 AM

Quote: Originally Posted by taylor757

Whats that? Sorry Im still new at this. I dont have a cat and also i have the fouler mod

If the car thinks the cat is too hot it will dump ass loads of fuel. Has been a motherfucker on my car with stock turbo with a map clamp and now with a 50 trim and SCT tuning. A lot of the SCT guys are talking about having the same problem and turning off the stuff that calculates cat temperature.

rasp · 07-18-2008, 10:19 AM

I had to pull quite a bit up top running 43psi of static pressure on my RC750s to keep myself in an acceptable A/F ratio at the top of 4th gear. These cars seem to like to dump fuel in that gear up top.

never2muchboost · 07-18-2008, 10:22 AM

Quote: Originally Posted by taylor757

Just got done with my turbo install GT3076 with return line kit arronneon rc750's 255 pump safc II and I can't seem to get the AR at wot higher than 9.6 my fuel pressure is set at static 40PSI and im pulling 8% in the low and 20% in the high across the board.It will idle at 14.7 all day. Also im at 20PSI. Any Ideas? Thanks

are you sure tha afc settings are correct? you should have sensor type set to pressure 10 in 10 out and make sure it is set to 4cyl with the arrow pointing northeast

never2muchboost · 07-18-2008, 10:24 AM

if the afc was doing it job and removing 20% and you are not running a rising rate on the fpr you should be going dead lean.the pcm will compensate up to 30% in closed loop which is why you are running stoich at idle.