Question about 2004 Jeep Grand Cherokee

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2004 jeep grand cherokee 4.7 v8, antifreeze vapor from exhaust, slight miss,no overheating , starts & runs fine otherwise,164000 miles , oil was always changed every 3000 miles , I'm guessing

Things started to snowball on this car.I'm the original owner. Car is immaculate condition. The engine started to rev up & down slightly,so I went to auotzone & plugged in the analyzer etc. it showed Idle control switch. So we put in a new one, she ran great. 5 days later The check engine light comes on.It did not come on during the idle prob.I went back to AZ. They said I have a miss in cylinder # 1. bought all new spark plugs.& 1 new coil. The next day the car cranked funny like a stumble then cranked normal. I put a testeron the battery etc. Showed that my alternater was not charging. took it out to the alternater shop, they said it was bad , so we replaced it. I realize stuff starts to go bad with many miles.Ran great after that. But now I noticed steam comming from the exhaust which does not stop & smells like anti freeze. I guess a bad head gasket. I would like to keep this car. anyone know what a repacement engine would cost turn key?

Posted by Daniel Vellotti on


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Frank Magliocca

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Posted on Mar 08, 2017


5 Related Answers


SOURCE: 2000 jeep grand V8 low idle then dies

check to see if you got a pluged cat

Posted on Oct 25, 2008



  • 50 Answers

SOURCE: 93 Jeep Grand Cherokee Won't start

The crankshaft position sensor was seriously problematic in those old jeeps. It's located towards the top of the bell housing slightly to the driver's side I think.

Posted on Apr 15, 2009


  • 25 Answers

SOURCE: Slight miss, starts a little hard then runs fine rough idle from time to time

It sounds like its out of time move the distriutor a little bit

Posted on May 15, 2009

Richard Scordino

  • 6982 Answers


Check your water pump for signs of seepage. Do this with no pressure in the system and cap off. Sometimes in the beginning stages of failure pressurizing the system will drive the seal against the shaft and actually hide the leak. I have seen very small cracks in cylinder heads, especially between the valves that won't show up on a pressure test 'till they get worse. Check the plugs for any coloring from antifreeze.
You are going in the right direction so far, but need to go over everything sometimes a few times before a small leak is found. Keep an eye out for dried or semi-dried stains, especially around the perimeter of the head /block parting line...sometimes small leaks will only leave a slight stain, often white or antifreeze colored powder residue.
Hate to say it, but sometimes when you can't find it, just put some block sealer in there and see if it corrects the problem.I'm a professional but sometimes just doing that saves a big headache for a small problem.

Posted on Nov 19, 2009

Patrick Rayome

  • 1757 Answers

SOURCE: Idle problems 1995 Jeep Grand Cherokee Limited V8

There are several possibilites.
When it dies does the Engine Light come-on and stay-on? If so there are codes which are present that can isolate/point you to a more specific problem.
Based soley on your description: I would first check your Spark Plugs, Wires, and Coil. When were they last replaced? If these are fine: When was the Fuel Filter replaced? Air Filter? Check the fuel pressure at the port located on the fuel rail in the engine compartment.
If those check out okay: I would check and/or replace the Idle Sensor and/or the Throttle Position Sensor.
Basic rules on bad idling:
1. Fuel - is there enough getting to the cylinders?
2. Spark - Is there consistent spark getting to all the cyclinders?
3. Air - Is there a air shortage = clogged air filter?
Let me know if this helped, or if you have additinal information or questions. Feel free to contact me a!

Posted on Jan 06, 2010

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2004 Jeep Grand Cherokee 4.0 wont go over 25 mph. There are no fault codes.

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1998 jeep grand cherokee, with 4.0 6 engine will run fine most of the time. then it will be hard to start, miss, and die. then when it will start will run rough, die, and then it run fine for a while. i...

OK...if someone gives me a bad rating on this, I'll be really annoyed...
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