92 wrangler 2.5l when warm only; has misfire.rough idle. only when at idle when it has warmed up. i have replaced the cap,rotor,plugs,wires.coil,and 02 sensor. the 92 2.5l is said to not have an egr valve. should i check for the coolant temp sensor...? or what next. i have been advised previously by "guru" to check the egr but it is not so equiped.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
REPLACE DISTRIBUTOR CAP AND ROTOR REPLACE SPARK PLUGS AND WIRES IF NOT BEEN CHANGED IN LONG PERIOD OF TIME.CHECK IGNITION TIMING.CHANGE AIR FILTER CLEAN FUEL INJECTORS.IF ENGINE STILL MISFIRE IGNITION COIL IS WEAK OR YOU HAVE LOW CYLINDER COMPRESSION.
Well if it does it after warm up then yes it is more than likely a coolant temp sensor gone whacko or its the thermostat that may be stuck when trying to expand. Other than that the stuff that you replaced should have fixed it. Have a good one!
check that the EGR valve is not sticking or has a vacuum leak. This valve will not operate until the engine is warm.
check also the engine coolant temp sensor (ECT). This sensor tells the engine computer that the engine has warmed up, so if it is faulty, it could be sending wrong information to the computer. If the sensor is disconnected, wires to it broken, or faulty in full cold mode, it will tell the computer that the engine is very cold, like -40F. The computer will schedule fuel for cold conditions. This is usually way too much fuel for a warm engine and it will rich misfire, idle rough, and be difficult to start warm.
The ECT has two wires going to it and is dedicated to sending information to the engine computer. It has nothing to do with your dash gauge that shows coolant temp. That sender has only one wire and is dedicated to the coolant temp gauge.
Could very well be the main relay, limiting power to all the electronics in your car, causing the problems you've mentioned. Have it repaired or replaced.
If the engine seems to run fine over 1450 RPM maybe there is a vacuum hose leaking or EGR valve is slightly stuck open. Any help from the OBD II trouble codes? Or is there simply no MIL and no stored information in the OBD II computer read at the local parts store through the connector by the drivers knee?
×