Skip the auto shop - Our mechanics make house calls

Q: Engine takes too long to warm up runs poor until it warms up.

asked by on

My engine runs poor misses hesitates until it warms up can the clutch on my fan cause this issue keeping the engine to cold

My car has 1730000 miles.
My car has an automatic transmission.

A: There is only two possible causes of an eng...

There is only two possible causes of an engine running colder than it is supposed to. The fan clutch may be locked up and would cause a load on the engine and excessive airflow across the radiator not allowing the engine to get to operating temperature fast enough. It may take a real long time to even get close to the normal operation temperature. The thermostat controls coolant flow through the engine and is suppose to stay closed until the engine starts warming up and then allows the coolant to flow through the motor at a controlled rate maintaining the correct engine temperature. If the thermostat is stuck in the open position or has been removed for some reason then the engine will not warm up very fast or may not have a constant temperature control of the engine. I recommend having the cooling system tested to see if the cooling fan clutch needs replaced or the thermostat is bad. You may have both problems and this would compound the problem causing the engine to run cold all the time and no heater performance. Have a mechanic like one from YourMechanic come to you and do a coolant performance test and determine the cause of running too cold and rough.

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・Save up to 30%

Get a quote

What others are asking

Q: Opinion on '90 to '95 Nissan Pathfinder

Not the new ones, but the old ones were good, yes. Nissan Pathfinders were decent vehicles, but you don't want to get one that is all worn out. Those have a lot of problems with automatic transmissions. If you can...

Q: Over heated

This sounds like you have more problems than a stuck thermostat. A thermostat that is stuck closed will cause the engine to overheat within five minutes of starting the engine. The cooling fans can cause the overheating if they are...

Q: Failing fan clutch symptoms

What you described is happening is normal cooling fan clutch operation. When you first start the engine the cooling fan clutch will be in the full engaged position and may take a minute for the internal fluid to move back...

Related articles

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...