Skip the auto shop - Our mechanics make house calls

Q: Cold engine problems.

asked by on

When the engine is cold and I turn it on it starts up then chugs and then sounds like its going to die and runs low rpms and if I try to drive it studders unless I give it a lot of gas but if I start it when it's warm no problems. Check engine light is not on comes on every now and then but always turns off in 2-3 days what could it be?

My car has 155000 miles.
My car has an automatic transmission.

A: This may be related to the idle air control...

This may be related to the idle air control module/valve, which is a component that monitors the amount of of air intake at idle as it is mixed with the fuel prior to being injected into the motor. When this is faulty, it will cause an imbalance in the air/fuel ratio which can cause it to run poorly as you have described. These symptoms are usually accompanied by a Check Engine Light. I would suggest having an expert from YourMechanic come to your home to diagnose the loss of power to pinpoint what fixes will help get the car running at its best again.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: How much to replace an alternator

Hello. The symptoms you describe are more commonly associated with a bad battery. If a battery is old or worn it may not be able to hold a charge, which will result in a no start condition once the battery...

Q: The car stalled at the traffic light, started from park

Hello. There are a few issues that can cause this. If it only stalled while at a stop, then it may be a dirty throttle body or a failing idle control valve. Most of the time the throttle body can...

Q: Why are my signal mirrors flashing wile my truck is turned off its just the blinker in both mirrors, mirrors are factory

Hello. If any sort of lights keep flashing when the vehicle is turned off then there is likely some sort of electrical issue present in the vehicle. A few common causes for lighting malfunctions are a faulty turn signal switch,...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...