bulfo4
NAXJA Forum User
- Location
- New mexico
1996 4.0L HO.
is the best. This one has me scratching my head. Maybe you guys can help. My Jeep shakes around, sputters and dies at low RPMs, Not low speed or idle. It does better in Park, and if i keep pumping the gas, it'll catch and run, and does fine going up hill, but dies if I drop the RPMs going downhill. The whole thing is intermittent. It does it for an afternoon really bad and then is fine for a few weeks.
I've changed both O2 sensors, cleaned the air filter, and have gotten gas from several different places thinking it might be bad gas. Fuel Pump seems to work like normal, and there's pressure in the line up to the engine.
The check engine light was on and Autozone's reader said:
"P0171"
Definition
Fuel trim bank one condition
Explanation
The powertrain control module uses the oxygen sensor to calculate the air/fuel ratio of the engine. The computer has recognized a rich or lean condition on one engine bank only.
Probable cause
1. If bank one and two codes set together suspect fuel pressure or MAF (Mass Air Flow) sensor
2. Oxygen sensor defective
3. Ignition misfire - repair
4. Fuel injector problem.
Has anyone had this problem? Suggestions?
Thanks a ton,
Tom
is the best. This one has me scratching my head. Maybe you guys can help. My Jeep shakes around, sputters and dies at low RPMs, Not low speed or idle. It does better in Park, and if i keep pumping the gas, it'll catch and run, and does fine going up hill, but dies if I drop the RPMs going downhill. The whole thing is intermittent. It does it for an afternoon really bad and then is fine for a few weeks.
I've changed both O2 sensors, cleaned the air filter, and have gotten gas from several different places thinking it might be bad gas. Fuel Pump seems to work like normal, and there's pressure in the line up to the engine.
The check engine light was on and Autozone's reader said:
"P0171"
Definition
Fuel trim bank one condition
Explanation
The powertrain control module uses the oxygen sensor to calculate the air/fuel ratio of the engine. The computer has recognized a rich or lean condition on one engine bank only.
Probable cause
1. If bank one and two codes set together suspect fuel pressure or MAF (Mass Air Flow) sensor
2. Oxygen sensor defective
3. Ignition misfire - repair
4. Fuel injector problem.
Has anyone had this problem? Suggestions?
Thanks a ton,
Tom