Trouble with the xj

[AtlasYota]

Got a problem with my jeep when i'm accelerating. The engine seems to falter when i accelerate and then the check engine light comes on. It'll only come on when i mash the gas pedal. I have a 5 speed and the 4.0. My guess that its some senser gone bad but i have no idea what it might be. Anyone have any ideas?

 

[kilby]

What year is it?

My first guess for sensors would be the oxygen sensors in the exhaust line. There are a bunch of other air/fuel related emissions sensors, though.

Have you done any mods to the engine?

 

[AtlasYota]

Its a 91, no the engine is stock.

 

[guffey24]

could be oxygen

I am thinking maybe the tps

throttle position sensor

that seems to be the first sensor to go out in the 90's model Jeeps

 

[AtlasYota]

where would that be located at?

 

[sprinkler1228]

Side of the throttle body. I would spend the $14 for a Haynes or Chiltons manual.

 

[Reed]

Kinda a stretch, but that used to happen to my brothers XJ, it eventually evolved to the engine vapor locking. After 2 weeks and every mechanic at the jeep dealership is gso working on it Turned out to be a cracked o ring in the fuel injector i think, which caused the fuel rail to fill with air.

 

[Gmachine]

Mine did the same thing. TPS! I think it was $40

 

[AtlasYota]

could it also be the fuel pump?