OHQuattros(tehblur)

CEL and a code of - 17544 "Fuel trim bank- System too rich". Any ideas? On my '99.5 w/ 26K miles.

Havepitty in W.Van

check intake pipings and charge pipings.

check block 032

first field shows air correction when idling (most likey intake to turbo) should be +-10%



second field shows air correction when driven (most likely between turbo and throttle body)
max +-20%

Mat Indukts Lambos

it could also be as simple as the vacuum line to the fuel pressure regulator. Otherwise, it's either a boost leak, or a bad MAF. Look for the leak first.

OHQuattros(tehblur)

Block 031 .855 at full throttle so O2 sensors are good. Block 032 I believe these values were 14% for the first block and like 3% something for the second block. I'll check again. Those are nowhere near the values Havepitty gave.

xr4tic

Unless it's the FPR line like Mat said, then that could cause a rich condition during PT driving, and lean under WOT.

xr4tic

O2 sensors are only accurate at 14.7:1 ratio, and over time, they drift due to use or contamination.

I'd reset the ECU, do a TB adaptation, and then let it idle for a while, and see what the idle % (1st value) does. Then drive it on the freeway, and see what the PT % does (2nd value)

If it's a negative value, then you're running rich, and the ECU is removing fuel based on the O2 sensor. If it's positive, you're running lean, and the ECU is adding fuel.

It could be a bad MAF also.