I have Idling problems with my jeep?

(2011-07-27 14:20:27)

1. Kenneth Walter Says: I don't know how exactly to explain it other than give symptoms. sometimes more increasingly when I start the car the engine will idle low or rough until I give it some gas, while its in park. I can also be driving and come up to a stop sign or stop light, and it will idle low or rough, but not all the time. I dont think its the transmission because it happens while in park, I recently changed the spark plugs and cables to see if that was the problem but its still doing it. Today I put some fuel injector cleaner in it tonight to see if it might be the injector or carberator. does anyone have any ideas as to the problem... if you want to know more just ask because I will be cheking this about every ten minutes.

2. Pete M Says: I like to try the least expensive fixes first:

Check out your Exhaust Gas Recirculation (EGR) and Positive Crankcase Ventilation (PCV) valves.

Could also be your Cam Position Sensor

Cam Position Sensor (CPS) - Symptoms
No Spark
Rough Idle
Drop in Fuel Mileage
Stumbling or Hesitation
Stalling on Acceleration
Intermittent Rough Running
Long Cranking Time When Cold

3. a_ninja_racer25 Says: you could have a vacuum leak or maybe a Sensor is going bad some sensors can go bad and cause this issue with out throwing a check engine light. especially in older vehicles I'm not sure how old your jeep is.

4. John E Says: sounds like a carter carb, if so buy a Weber.

5. taxpayer Says: sounds like dirt if a carb just turn up the idle screw

6. astrobuf Says: You have a serious problem going in here. Hard to tell from your symptoms, and you don't say what year and engine you are speaking of, or whether the problem goes away while driving. Could be a fuel problem, an ignition problem or an emissions problem.

1.) You should have changed the cap and rotor if your engine has one.
2.) I'd check for codes in the computer. This can be done with a borrowed code reader from many parts stores. Autozone for example will read the codes for you and tell you what parts you might need to fix it.
3.) You may have a vacuum leak. A cracked intake manifold could be the problem.
4.) The Mass Airflow sensor may be bad and feeding the computer bogus info re: engine condition.
5.) You could have damaged injectors Unless your Jeep is quite old, it does not have a carburetor.

Astrobuf