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  1. #1
    Junior Member
    Join Date
    Jul 2009
    Location
    Houston
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    Pewter
    2001 Camaro Drop Top

    Help, Fuel Trim on passenger side Bank

    I had just finished a swap in my 2001 camaro from an ls1 (that threw a rod) to a ls6 out of a 2004 Z06 vette. It had a pretty big cam already in it, comp cam 235/242 115lsa +4. I had it tuned and the first problem we ran into was the passenger side bank was dumping fuel. The driver side was fine but the trim was not regulating the passenger bank. Narrowed it down to the valley plate had oozed sealant causing a gap in the intake. Seemed to fix the problem and he dyno tuned. Here is where I need an experienced tuner. We blew an 02 and replaced it. Fuel pump kept jumping around between 42 and 48 psi (I'm passing it off as the car was hot when he checked the pressure as it supposed to be cold, but we had pressure) I have stock exhaust heads with the AIR system still attached. He had me pull the vacuum line that runs from the backside of the manifold, comes up and over to the AIR sensor looped to the shutoff valve located on the driver side in the rear of the manifold. I understand if I had headers this would be eliminated but I'm new at ls1's and didn't ask questions. It ran great for a bit but when idling around 800rpm (I have a yank 3200 stall btw) the car would shake and start flashing the SES unless i kept it around 900 to 1000 rpm. Autozone scanned it and it pulled no codes. The first day out the gas was pretty decent but now it is sucking fuel and idling rougher then before. Any clue to how important the AIR system is and if the vacuum line being pulled would cause this problem like the vacuum leak did the first time?

  2. #2
    Junior Member
    Join Date
    Jul 2009
    Location
    Houston
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    9

    Pewter
    2001 Camaro Drop Top

    If it makes a Difference it is the Ls6 intake.

  3. #3
    TunedbyFrost.com Tuner Frost's Avatar
    Join Date
    Jul 2007
    Location
    Richmond VA
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    2,415

    LS1.com Sponsor
    GM Tuner

    flashing SES = engine is currently misfiring.

    If your fuel pressure is erratic and moving form 42-48 then I can't imagine WHY your tuner would even continue to tune the car. The car CANNOT be tuned until the fuel system is fixed. Your FP should be rock solid at 58ish psi. Losing a few psi (literally a few) at WOT is ok, but NOWHERE else.

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