my job has been bogging down lately. at wot it will perform normal till about 2.5-3 thousand rpms it has no problem. feels almost like a clogged cat. but My cat has been gutted so i dont see that as the problem. and sometimes it jerks back and forth violently and has stalled on me a few times. I've replaced both 02 sensor. the crank position sensor, spark plugs, wires distributor cap and rotor. i dont know what else, could it be the fuel pump all off a sudden or what do you guys think? any help will be greatly appreciated

 

try changing the fuel filter, it's cheap.

 

Fuel filter is inside the tank. and its not supposed to need maintenance, I was thinking maybe it might be the throttle positioning sensor?

 

should a filter on the frame as well. check fuel pressure fuel pump could be done

 

anyone else know what this could be.. its been going on forever already and i dont have money to take it to a shop.. please help

 

had trouble like that with 88 xj was the fuel pump.

 

a drive ability issue like that it would be a wise idea to take it to a reputable shop if you know of a good shop the has a good diagnostition take it to them and ask them to spend an hour or two figureing it out, useually within an hour it can be figured out if not then alot of stuff can be eliminated tell them you cant afford for them to fix it but dont want to change parts that are good if they give you any grief then its not the shop for you .

 

Any codes, sounds like a fuel / air problem maybe MAP sensor or IAC sensor.

 

fuel pump pressure was 35.. supposed to be at 49-51.. replace the fuel pump and problem is fixed:)