Vacuum reservoir.

 

Change the emblems on the fenders..........

 

I've spent a week looking for an answer so I hope you can help. 2001 Cherokee, replaced - coil rail, all injectors(4 hole), reflashed ecm $$$, new plugs, crank position sensor and shaft. I still get misfire codes and low pressre evap. leak codes. Starts good and idles good. When I excellerate hard engine starts missing and stumbling. Won't go past 2500 rpm untill I turn the key off and back on. Then it runs great untill I excellerate hard again(as in passing). restarting always corrects the problems. 195,000 mi. Uses no oil of radiator fluid. PLEASE HELP.

 

What codes are you getting? Accelerate?

 

Sounds like a map sensor issue to me. Check the vacuum lines running to it for cracks and leaks. I belive there is a way to test it elecrrically as well.

 

If a tps or iac is bad will that give me a bad throttle response? Gonna try and test the ps after school and maybe clean the iac but just wondering

 

If the tps is bad yes it can

 

Was sitting in my 98 Cherokee idling when it shut down as if I'd turned the key off. Testing shows no spark to plugs. Replaced CPS and coil, still nothing. This Jeep has Police Package with EXT Idle switch. Indicator light on that switch no longer lights. Could that switch be the source of the problem? Any ideas are welcome. Help!! Thanks!!

 

But no IAC? Good that narrows it down more lol

 

Distributor, cap, rotor, plugs, wires. Sounds like its time for a tune up. I know one time my jeep just died in my driveway. We never found the problem, but a tune up fixed it. A tune up wouldn't hurt but ill bet it fixes it. Will it crank?

 

Correct, the iac controls the engine rpm at idle only

 

Oh I see, ill clean out the iac and throw in a tps. Any good brands or just pick one?

 

anything really but napa

 

Sweeeeeet I might pick one up if I get money

 

Ah i was wondering where this post was.