Skip the auto shop - Our mechanics make house calls

Q: Floods bad when cold runs great when warms up

asked by on

When I first crank it up won't hardly run floods bad when it warms up it runs great the colder the weather the worse it does. Ok

My car has 136000 miles.
My car has a manual transmission.

A: Hi. This problem is most likely caused by a...

Hi. This problem is most likely caused by a faulty coolant temperature sensor, which is sending a signal to engine management that it is colder than it actually is. This causes engine management to inject more fuel than is needed for the cooler temperature, making the engine run rich or flood. This temperature signal misrepresentation is less of an issue as the engine warms up, although it is probably still running a bit rich. If you need further help having this addressed, a qualified pro from YourMechanic can come to your car's location to inspect the rough running issue and guide you with accurate repairs.

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: Replaced master cylinder and brakes still going to the floor and not working. Bed both master cylinders and each wheel.

If your vehicle has ABS brakes, it is possible that there is an air bubble in the ABS system. Many vehicles require a special bleeding procedure for vehicles with ABS. This will require you to do the bleeding in a...

Q: Aftermarket sound installation

Depending on the size of the amp, you should not have a problem. But the battery is used as a power supply for important engine functions, so if you have problems with any of these functions, then remove the amp...

Q: Hooked up battery backwards everything works but engine won't crank

i am working on this

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...
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...
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...