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Chris
Chris, Technician
Category: Chrysler
Satisfied Customers: 13153
Experience:  30 years certified Chrysler technician, smog license Certified Master Technician
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Chrysler pt cruiser: Car start idleing rough when turn on a/c

Customer Question

Car start idleing rough when turn on a/c or lights when in gear
Submitted: 1 year ago.
Category: Chrysler
Expert:  Chris replied 1 year ago.
Welcome! my name is ***** ***** I would like to thank you for allowing me to assist you! . This is usually caused by a throttle body that has become coked up with carbon deposits. When the throttle body gets dirty, then the airflow going around the throttle plate gets restricted. This can cause low or rough idle problems. The other thing it may be is an idle motor that is sticking and cannot react fast enough to maintain an acceptable idle. I recommend purchasing a can of spray throttle body cleaner and clean out the inside of the throttle body. Be sure to clean the throttle plate paying attention to the edges of the plate (follow the directions on the can). If you still have this problem, then replacing the idle motor would be the next step.
Hope this information helps, and let me know if you need more assistance with this,
Chris

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