Q: Engine won't idle when cold - 2001 Chevrolet Silverado

asked by on

replaced idle control sensor no vaccum leaks but truck will not idle when the engine is cold?

My car has 270000 miles.
My car has an automatic transmission.

Hi there - given your repairs already, I would suspect a fuel-related issue, specifically the engine coolant temperature sensor (for engine management, not the gauge). If a faulty temperature signal is sent to engine management, the engine may not be getting a rich enough mixture when cold. This kind of failure is masked when the engine warms up - engine will run fine when hot. I would recommend an inspection of engine sensors to resolve the poor cold running you are experiencing by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

Was this answer helpful?
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. Engine won't idle when cold - 2001 Chevrolet Silverado

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: My 2001 Mercury cougar will start just fine but will sputter/ shake then die when not pushing on the gas or stop/idle.

This may be a result of a dirty or failing idle air control valve. The idle air control valve reads the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and...

Q: low idle around 400 rpms

This generation of Lexus GS models has a known issue for this and can often be corrected by cleaning the throttle body. I would also recommend testing the MAF (Mass Air Flow sensor) as well as this can lead to...

Q: My truck wont move in any gear and its smoking

You should check to see where exactly the smoke is coming from, it would be helpful to know for this diagnostic. As for why your truck won't go into gear, I suspect you have a transmission fluid leak and it...

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.