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My 1999 Jeep dies out mostly in the a.m. when I back out of my garage. I need to let it warm up every time it sits for a few hours or it dies. after it dies I start it up and it works but it takes awhile until I drive to feel normal. My mechanic has tried different things but still does the same. What do you think it can be?

Answers from the Automotive Experts

Amanda J. Pierce, MBA Annette, Sounds like you may have a malfunctioning idle air control valve, or a failing EGR valve. Characterisitics that lead to this drivability concern can also come from a cam position sensor or a MAP sensor.

Karen Davis, Service Manager at Smith Stokes Annette, There is actually an update to the Powertrain Control Module on your vehicle for the concern you are describing. The update is for the Idle Air Control losing its position. If this has not been done in the past, I would recommend it be done before you go any further. It sounds like you might be having an idle speed problem. Hopefully the technician has cleaned the throttle body which houses it and cleaned it as well. This is just a place to start. Good luck and hope its simple!

Suzanne Grego, Technician at City of Philadelphia Fleet Management Annette, This does not sound like a battery or charging problem, since it does start right away. It is possible that you have some water in the gas tank that is killing the engine as the need for more gas increases. You may want to have your tank drained completely to see if this has any affect. Suzanne

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