Re: Duratec 2.5 lean at idle (decel)
>Was the water pump - expensive little sinner too!! And the CEL came on
>as it was driven into the shop to replace it --- both banks showing
Well - the ongoing saga of the P0174 and P0171 codes on the '96
Mystique 2.5 Duratec continues.
I have done every test imaginable on this car - and EVERYTHING passes
- but I still get the P0174 code.
I have replaced upper and lower intake manifold gaskets (which WERE
leaking) , and checked the runner control shaft bushings for leak. I
have checked fuel pressure, cleaned injectors, replaced PCV, and
cleaned the MAF sensor 4 times. I also changed the Bank #2 O2 sensor
#1 when it threw a code and occaisionaly did not "clock"
After running one or two fuel monitor cycles (0-65 and back to 40mph
without touching the brakes) there was always a code P0174, and
sometimesa a pending P0171 - whether the CEL was on or not. The long
term fuel trims were quite different bank to bank.
I tried re-adjusting the throttle valve stop on the advice that IF it
had been tampered with, it COULD cause the problem.
Finally, I got cheezed off enough to get a replacement MAF sensor. The
readings were virtually identical between the two sensors both at idle
and at 2000 RPM - but today I changed it anyway - SOMETHING has to be
wrong SOMEWHERE - right?
Well, after I changed the MAF sensor, and reset the CEL, there was
STILL a P0174 code. I disconnected the battery (which I have done
several times in the past) for 3 minutes, and reconnected it. When I
restarted the engine, and checked codes, THE P0174 CODE WAS GONE!!!!!
Funny - never had that happen before.
Ran it through 3 fuel monitor cycles - still no code - and the fuel
trims are VERY close to the same bank to bank.
Do I DARE to think, perhaps, the problem is now solved??????
Stay tuned - we'll know in a day or so-------------.