HomeWhat makes the engine idle speed go up and down when cold?
Wiki User
2005-01-10 17:51:51
2005-01-10 17:51:51
If its a ford-The IAC motor is Dirty & can B Cleaned.
Related Questions
Cold oil when you first start the engine will have lots of pressure then it will settle down as the oil warms and thins out.
because your engine is going to break down or when you start the car if the whether is cold, it makes it smell like gas
Surging is the condition where the engine power fluctuates up and down with a continuous, soft jerking motion. When driving at a steady speed, the engine seems to speed up and slow down, without moving the accelerator.
Don't know how cold your cold is but, it could be water in the fuel system (ice).
if the engine is cold the computer says I'm cold so rich up the mixture and speed up the engine via TPS. then once the engine warms up another sensor tells the computer it has warmed up and decrease the TPS signal slowing the RPM down.
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