Q: Does not idle when cold

asked by on

since the mornings have gotten colder(30 degrees) engine rpm's are low untill engine warms. have to keep prm up with excelarator .after engine warms rpm picks up to normal, 800. everything seems to work ok when weather is warm

My car has 200000 miles.
My car has an automatic transmission.

When the engine is cold the engine needs to add more fuel to the engine. If the fuel injectors are dirty or you have carbon build up on the valves then this can cause the running problems. I recommend having the engine checked by a mechanic like one from YourMechanic to perform cleaning the injectors and throttle body intake valves of carbon buildup. This should help clear up the running problems if all the regular maintenance has been done like ignition tune up. If not then it should be done at the same time.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. Does not idle when cold

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: The car cannot start, oil pan dented, lost oil pressure

Hello there, there are a few problems that could result in the loss of oil pressure and not being able to start. If the pan was hit in the right place it may have interfered with the oil pickup. The...

Q: Car does not shift correctly into the right gear when accelarating too fast.

You appear to have a problem with both the engine and the transmission. Diagnostic Trouble Codes, if they have set, should be downloaded from the OBD-II terminal under the steering column. The rough idling is probably resolvable to some extent...

Q: How do I program the universal garage door opener with a fixed code?

Your truck has a Universal Garage Door Opener that makes it easier for you to open your garage door. They have a specific way to program them with a Fixed Code. To program the Universal Garage Door Opener with a...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...