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Starting in the morning cold is a problem. Jeep

By gfisk48 on Nov 04, 2009

" "

Starting in the morning cold is a problem. Jeep starts and accelerates up, then drops down and stalls. Can't start againg without using the gas. Then will stall at traffic signals, because idle is too low. After letting engine is warm, shutoff and let set for awhile, will start as normal. Check enginge light remains on for 4-5 cycles. What is problem?

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Best Solution

posted on Nov 04, 2009

paulattard

Rank: Wiz Cars

Expert
Rating: 83%, 34 votes

The problem is with the engine management system that controls the idle speed for cold starts and pretty much everything else. In the old days the problem would be the auto choke but as this is a new model its the electonics I'm afraid. You can get this sorted out at a dealer. It should still be under warrenty.

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" It has been sent back to the dealer today. I had it the dealership all last week and they would start it. It didn't do it, because it was too warm o " - gfisk48

Solution #2

posted on Nov 04, 2009

Molson02536

Rank: Guru Jeep

Expert
Rating: 94%, 1556 votes

It could also be carbon build up on the throttle body, but regardless the cure is the same. Your going to need to clean the throttle body and the idle air control valve (IAC). With a can of throttle body cleaner, (follow instruction on the can) clean the throttle body blade and the IAC passage way in the throttle body and IAC. Once the throttle body is cleaned, with the engine off, turn the ignition key to the on position (engine not running) and wait for 30 seconds and then turn if off for 10 seconds and then start it. This should reset the IAC, if it did not work do it again and see if it helps. If not clean out the IAC passage way again. The turning on and off the ignition reset's the IAC and it may still be stuck with carbon build up. Once the engine has started, Note there will be lots of smoke form the tail pipe, that's normal. It's just the left over throttle body cleaner and carbon being burn off, take's not more then 10 min to burn off. Good luck and this should keep you from replacing the IAC. Oh and don't use Carb cleaner, Carb cleaner is to corrosive to the throttle body gasket.

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