My 96 s10 2.2 automatic has been giving me fits again.
It starts chugging and barely running sometimes. seems not
to happen with a full tank. And i kind of hear the fuel pump
louder when this happens. This happened on the interstate
last night. It did not quit running, but i steadily lost speed
and i pulled over and let it cool off. It seemed to maybe be
backfiring but it was hard to tell. I could not pick up speed
going up hill. Let it cool and Started it back up and went a
few miles and it happened again. The check engine
light came on with P0171 (system too lean bank1)
Well, its a four so only one bank.
My suspicions are fuel pump, or plugged cat. Which would be
more likely to set the system too lean code? I did change the
external fuel filter on the frame rail. I have not had the fuel
pump out of the tank yet (dam thing is over $200 to replace).
I did buy a tampon looking in tank fuel strainer from autozone that
i am going to try to put on if i can get the old one off. Any ideas
here? AM i barking up the right tree? Or could this be the computer
malfunctioning . (when this happened yesterday, it was 95 outside
and i had the air running). Today in town, 1/2 tank, it putted around
ok. No interstate High speed though. When this happened yesterday,
it was hot on the temp gauge (225 or so), but it was not overheating and
into the red zone. (and it was 95 outside with the A/C on).
Volts were OK. Oil pressure ok. The code has not come back on
since i had autozone scan it yesterday and clear it.