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Old October 17th, 2011, 08:30 PM   #1
Catnip 0_o
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Veichle engine shakes when started cold.

Lately my 02 TJ has been starting up not the way it should. It has happened a few times when the engine is hot but more so when it is cold. I will start it up and the engine will shake, and sounds like it is low on power and not getting enough fuel. Then after a few seconds it goes away and when warmed up becomes fine. The jeep has 130k miles on it and is the 4.0L. Any ideas as to what this could be?

Thanks :)
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Old October 28th, 2011, 10:40 AM   #2
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I would check and make sure the EGR valve is not stuck open. Pull the hose at the intake and block it off. If it resolves the problem, you are at least in the correct area.
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Old October 28th, 2011, 10:51 AM   #3
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That sounds like what my Saturn would do. I removed the egr valve, and blocked the port, problem solved.
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Old November 9th, 2011, 07:53 PM   #4
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No point in guessing use that brain under the dash.

Rent a code tester, follow the instructions, and plug it in.
See what you get then head down to your local jeep dealership.
They can pull out the book and tell you what the code means(if they are not idiots).

Turn your key to the on position and wait for a few seconds you may get a code coming across without the tool.

Generally (over 100k)it is a good idea to check/clear your codes every couple of oil changes by renting a tester. You will need to pay a bit up front but in many cases you get most if not all of it back when you return it. Most cases you can catch a relay/sensor going bad before it causes a larger issue. Some testers let you check your ABS, transmission, as well as engine.
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