codes P069e followed by p2635 on zl1 going down the track? - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

ZO6 Bryan · 07-26-2015, 10:31 PM

312 kPa converts to 45 psi. So yes, your fuel pressure is dropping at WOT. It should be 65 psi at WOT. So basically what I told you last week.

349 kPa converts to 50 psi. That is normal pressure for light load and idle.

Mil · 07-27-2015, 11:09 AM

Quote:

Originally Posted by ZO6 Bryan

312 kPa converts to 45 psi. So yes, your fuel pressure is dropping at WOT. It should be 65 psi at WOT. So basically what I told you last week.

349 kPa converts to 50 psi. That is normal pressure for light load and idle.

So then clearly something is wrong possibly weakening fuel pump? could it be a dirty fuel filter that needs to replace somewhere in the fuel line or on the pump??

Stephen12ZL1 · 07-27-2015, 11:22 AM

Quote:

Originally Posted by Mil

So then clearly something is wrong possibly weakening fuel pump? could it be a dirty fuel filter that needs to replace somewhere in the fuel line or on the pump??

the ZL1 has no fuel filter...only the fuel pump sock

ZO6 Bryan · 07-27-2015, 11:43 AM

Quote:

Originally Posted by Stephen12ZL1

the ZL1 has no fuel filter...only the fuel pump sock

Really!

Mil · 07-27-2015, 02:25 PM

Quote:

Originally Posted by ZO6 Bryan

Really!

same reaction here... LOL So then I think i see my next mod in the future: cut floor board under passenger seat to create fuel pump service panel

sfoda712 · 03-30-2019, 08:02 AM

I'm wondering if anybody has had this problem, i threw a P2635 code low side fuel pressure. I had my zl1 tuned at E70 because that all i could get in the winter. I was able to get E74 and under hard throttle it just started running like crap and threw this code. Could this due to the perimeters set for up to e69. and so it wasn't set for higher E. I current have stock fuel pump and dsx fuel system, my dyno was 712rwhp. the tuner never told me i was close on the low side...???? i I was half a tank and filled it up with 94 and it stopped doing it, e was down to 46, so when i took gas cap off while running it started running like shit again

1050 injectors, DSX fuel system, long tubes, BTR 2, whole valve train, bmr ice box, AFCO inner cooler, delete cats, CAI, Pullies lower and upper, 14 to15 lbs of boost,

DSX Tuning · 03-31-2019, 10:27 AM

Quote:

Originally Posted by sfoda712

I'm wondering if anybody has had this problem, i threw a P2635 code low side fuel pressure. I had my zl1 tuned at E70 because that all i could get in the winter. I was able to get E74 and under hard throttle it just started running like crap and threw this code. Could this due to the perimeters set for up to e69. and so it wasn't set for higher E. I current have stock fuel pump and dsx fuel system, my dyno was 712rwhp. the tuner never told me i was close on the low side...???? i I was half a tank and filled it up with 94 and it stopped doing it, e was down to 46, so when i took gas cap off while running it started running like shit again

1050 injectors, DSX fuel system, long tubes, BTR 2, whole valve train, bmr ice box, AFCO inner cooler, delete cats, CAI, Pullies lower and upper, 14 to15 lbs of boost,

P2635 is a false positive (aka nuisance) code that can happen with the aux pump. It is best to just disable it in the FPCM.

sfoda712 · 03-31-2019, 02:44 PM

i'm having a similar issue with my system, except mine was doing it when i ran e85. Also mine is only pulling -6 or -7 on the supercharger at idol, it started when i get in the gas and it doesn't go away. but my pressure is 50 t idol and 89 to 92 at wot. I have dsx fuel system and 1050 injectors so i know i have enough fuel, im wondering if i cracked my supercharger lid some how. i checked all the vaccuum lines and all hose and cont find anything, im doing a smoke test tomorrow to see if i have a vacuum leak some where....

sfoda712 · 03-31-2019, 03:03 PM

Quote:

Originally Posted by DSX Tuning

P2635 is a false positive (aka nuisance) code that can happen with the aux pump. It is best to just disable it in the FPCM.

ok i will have them do it, also my idol vacuum is only -5 or -6 and when i barely puch the throttle im in +boost, that's not normal but why? ive checked every vacuum line, doing smoke test tomorrow.

DSX Tuning · 04-01-2019, 08:13 AM

Quote:

Originally Posted by sfoda712

ok i will have them do it, also my idol vacuum is only -5 or -6 and when i barely puch the throttle im in +boost, that's not normal but why? ive checked every vacuum line, doing smoke test tomorrow.

That sounds like something mechanical that I don't think I can really give a good guess on.

07-26-2015, 10:31 PM	#15
ZO6 Bryan Drives: 02 Z06, 95 Trans Am, 2012 ZL1 Join Date: Mar 2012 Location: Southeast Posts: 1,838 View My Garage	312 kPa converts to 45 psi. So yes, your fuel pressure is dropping at WOT. It should be 65 psi at WOT. So basically what I told you last week. 349 kPa converts to 50 psi. That is normal pressure for light load and idle. __________________ Bryan 2018 ZL1 M6

03-30-2019, 08:02 AM	#20
sfoda712 Drives: Red zl1 700+ rwhp Join Date: Jul 2018 Location: Clinton pa Posts: 10	I'm wondering if anybody has had this problem, i threw a P2635 code low side fuel pressure. I had my zl1 tuned at E70 because that all i could get in the winter. I was able to get E74 and under hard throttle it just started running like crap and threw this code. Could this due to the perimeters set for up to e69. and so it wasn't set for higher E. I current have stock fuel pump and dsx fuel system, my dyno was 712rwhp. the tuner never told me i was close on the low side...???? i I was half a tank and filled it up with 94 and it stopped doing it, e was down to 46, so when i took gas cap off while running it started running like shit again 1050 injectors, DSX fuel system, long tubes, BTR 2, whole valve train, bmr ice box, AFCO inner cooler, delete cats, CAI, Pullies lower and upper, 14 to15 lbs of boost,

03-31-2019, 02:44 PM	#22
sfoda712 Drives: Red zl1 700+ rwhp Join Date: Jul 2018 Location: Clinton pa Posts: 10	i'm having a similar issue with my system, except mine was doing it when i ran e85. Also mine is only pulling -6 or -7 on the supercharger at idol, it started when i get in the gas and it doesn't go away. but my pressure is 50 t idol and 89 to 92 at wot. I have dsx fuel system and 1050 injectors so i know i have enough fuel, im wondering if i cracked my supercharger lid some how. i checked all the vaccuum lines and all hose and cont find anything, im doing a smoke test tomorrow to see if i have a vacuum leak some where....