usafws6

iTrader: (10)

I just cleaned the plugs and the o2 sensors are pretty new, im stumped. attached is a hp tuners scan file and the tune that is presently on the car. any help would be great. thanks in advance

Russ K

iTrader: (1)

Either you have a vacuum leak, or your Maf is bad. Just unplug the Maf for a quick test, if the fuel trims go down, then it's the Maf or a vacuum leak.

Russ Kemp

usafws6

iTrader: (10)

cool thanks ill try that in the morning.

usafws6

iTrader: (10)

maf didnt make much difference if any, short term fuel trims started creeping up within 2 min of idling. going to check for vacuum leaks today, hoping its no big deal.

SSpdDmon

iTrader: (10)

Fuel trims can increase at idle if IAT's rise. Don't rely solely on them. Agreed though - it's likely mechanical (vacuum leak, exhaust leak, bad sensors) assuming the tune is close.

usafws6

iTrader: (10)

ok so i fixed a nasty vacuum leak at the booster, heres a quick 4 min run from my house to the gym. any thoughts? im starting to think the 02's might be a suspect with such low numbers. im also considering running an clsd tune, can anyone shed light on whether or not i have to purchase additional credits to do this? thanks yall.

Russ K

iTrader: (1)

Looks a lot better. Why are some of the injector tables changed? Are you sure that there are no intake to cyl head vacuum leaks? As the fuel trims vary quite a bit bank to bank.

No credits required to tune SD, just fail the maf. The 1 bar os includes a tps multi for the ve table if a very large 250@.050+ duration cam is used. Also keeps the high & low octane spark tables functional and you get real time tuning.

Russ Kemp

usafws6

iTrader: (10)

there could be a cylinder head to intake leak, i sprayed with carb cleaner to verify but it could be on the underside. so as it is do you think the tune is safe to drive on a 10 mile round trip to work? ive never driven her more than a few hundred yards. in the mean time ill replace the 02s and intake gaskets and see if there are any improvements before i start logging more time. thanks for all your help, just starting to teach myself how to tune(with a guide of course).

Russ K

iTrader: (1)

What intake manifold? As an LS6 manifold requires the LS6 rear coolant block-offs & different front cross over pipe. And the Fast intake requires the button head valley cover bolts. With these manifolds, the wrong pipes/bolts will cause a vacuum leak as the manifold won't seat all the way down to the heads.

Any mods to the engine?

And don't use carb spray, use water from a spray hose to check for vacuum leaks.

Russ Kemp

usafws6

iTrader: (10)

just a stock ls1 intake, no mods to the engine except headers and dual exhaust. that OL EQ table you posted on another thread is that a good one for my car?