Camaroo1

Have you tried cleaning the injectors or doing a injector balance test?

1FSTLS1

iTrader: (9)

I got this info today:

STFT B1 21.88
LTFT B1 24.22

STFT B2 12.5
LTFT B2 -100

This is the freeze frame data I got off of my scanner. There is some other info there as well MAF 36.53 TPS 16.86 MAP (KPA) 0

I read this:
"The average long term fuel trim cell value is above 23 percent"
My LTFT on B2 is -100???? Why is my code on B1 lean and not B2 how can it be -100?

watercool5

Thanks for keeping this thread so detailed. I have the same problem! I was hoping that fuel system cleaner would take care of it, but that only worked long enough to pass emissions.

2000 TAWS6

iTrader: (1)

Based on the above, you have a vacuum leak. Check the pcv hoses and fittings very carefully. Check all connections from the rear of the MAF back to the intake.

Jon

1FSTLS1

iTrader: (9)

I have checked everything twice. Unless the head or intake has a crack.

Marc 85Z28

iTrader: (8)

That's a problem with the software in your scanner. A quality unit won't have glitches like that. But the bank 1 STFT and LTFT indicate a very large vacuum leak (bank 2 is most likely simliar) that should be audible!

You really need to examine the PCV system further. Your best bet is to monitor the fuel trims while disconnecting and plugging the PCV port on the intake and PCV breather at the throttle body. If the STFTs begin to correct immediately, you've isolated the problem.

xBrandonx

iTrader: (11)

I'm getting the same code. I can't figure it out either... PITA.

corvet786c

iTrader: (6)

I know this thread is old but reset those LTFT drive it for about 30miles and see where they are then.

1FSTLS1

iTrader: (9)

Wow this is old thread. I still have my car and have not fixed this problem yet. It mostly sits in the garage. How does one reset those LTFT?

corvet786c

iTrader: (6)

Its with HP Tuners in the special functions Tab, The Long term Fuel trims are reset. But You have to drive about 30 miles to get an idea where they are at. The Long term fuel trims are averging out what the short trims are doing.

I am having lean condition under boost, but I figured out , I believe its the wideband sensor, I searched and even though the WB works, it can be faulty. My O2 Sensors are reading about 900 plus mv under boost indicating a rich condition. I hope you still find your problem..

What are your mods?

1FSTLS1

iTrader: (9)

Aftermarket air intake that came with the car. Cam/valve springs LS6 intake EGR delete with long tube headers ORY without CATS Magnaflow dual cat back system.