throttling issues.. searched and replaced many parts!!
hey guys im hoping someone can help me out here... ive been battling with this issue for well over a month and have done a ton of research and even looked on here (which means IVE SEARCHED N SEARCHED SO DONT FLAME). basically heres a description of whats going on and what ive replaced already. now issues have changed slightly both for the better and for the worst with replacing different parts. i basically replaced one part at a time more or less so that i could eliminate what it could have been... but heres the deal..
my xj usually struggles to start up when its warmed up, and then when driving the throttle tends to hesitate or while idling at a light it will peak a little then drop down to around 500 or lower and sometimes just get crazy and then shut off.
heres a list of all the parts that i have replaced over the last few weeks trying to get it straight:
cps, tps, map sensor, upstream o2 sensor, new air filter, new cap and rotor, new plugs and wires (twice), new fuel pump, fuel pressure regulator, fuel filter external and also the sock on the fuel pump, rewired the faulty wiring in the fuel sending unit, rewired a baked area of the o2 sensor harness after the connection, cleaned the throttle body really well, cleaned the iac valve really well, and also replaced the ignition switch and lock cylinder....
so this is why i am lost. ive done so much research and spent more than enough money on the issue and would really like to move onto replacing the cooling system but this issue is holding me back from it. i noticed this morning though that the canister vacuum valve solenoid was making a tapping noise inside the housing. thats on the list for replacement now just have to order it. but i honestly dont see how that could be the issue to the problem. so please, if anyone has any insight on what could be my problem please let me know. any ideas are welcome!! and btw i have a 96 xj classic with the inline 6. (change over year)
thanks ahead of time!!