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Discussion Starter · #1 ·
First off - if this was posted with the same symptoms I apoligize...

'96 3.0L 111,135 Miles. P&P upper intake, Gutted MAF, cone fileter...

Im constantly getting a running lean code p0171/0174 IIRC, which is running lean front and rear banks. The code has only been thrown on normal driving conditions, I.E - not flooring it or revving it up constantly. Now, I have replaced almost every gasket on the upper part of the motor and double, even triple checked the torque specs. The gutted MAF and intake setup have not given me any problems up until ~ 8 months or so ago when I first got the code. Ive had the P&P/MAF/Intake setup for approx 2 years prior to this code with NO problems...The only thing that is activly wrong with the engine is the IAC is going bad and it needs a serpentine belt.... Ive replaced/tested the following:

Replaced all 4 O2's
Replaced TPS
Replaced UIM Gasket
Replaced EGR Gasket
Replaced PCV Valve
Replaced in line Fuel filter
Tested Fuel pressure at shrader, KOEO, KOER everything in normal spec, incl. FPR
Checked all vac lines to intake and sensor connecotrs
Ive run many bottles of FI cleaner through the system


The only thing that I can see going wrong is the MAF sensor is failing, but on a eec-v/obd-II system that would throw a "MAF out of range" or equivilant code right?

I do have a spare MAF/sensor and intake hose that I will be swapping out soon to see if this will remedy the problem. Does anyone else have any imput concerning what else to look at? Im pretty much stumped, and the maf swap is the only thing that I have left up my sleeve of tricks.
 

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Discussion Starter · #4 ·
GTX - plugs and wires were replaced 3 days ago. The failure of a plug would bring along a stumble in the ignition, misfire code and rough idle and general running - non of which my car has. Running lean/rich with it not really running lean/rich would also indicate failing o2 sensors, which was the first thing that I changed out.

Silva - Thanks for the backup with the idea. I don't have a K&N cone/panel filter on my car - the one I have is not oiled. I have some spare MAF sensors laying around the garage I will swap them out.

Also, is there anyway to test the maf sensor using a heafty amount of DIY tools? Or shouldn't I worry about this?
 

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Discussion Starter · #8 ·
Originally posted by XLSuruaT@Mar 7 2004, 11:45 PM
How is the accordion behind the maf?

Silva - once again man, good information.. Thanks for the tip I didn't even know the haynes had that info in there! go figure!
what accordian
I don't need no stinkin accordian!!!! Don't have one
 
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