Skip the auto shop - Our mechanics make house calls

Q: Car cranks slowly when it is hot, but cranks normal when the engine is cold

asked by on

When ever the engine runs for a while and becomes hot, it starts very slowly or not at all until when it is left to cool.

My car has 160000 miles.
My car has an automatic transmission.

A: Hello. The most common cause of a slow hot ...

Hello. The most common cause of a slow hot crank is a bad starter. As the brushes and the armature in the starter wear they begin to bind then the starter is hot causing this slow start. It can also be from a failing positive battery cable that has a lot of internal resistance. I usually check the cable by doing a resistance and voltage drop test. If it is fine then I do an amperage draw test of the starter and then replace the starter as that is the most common problem. If you want to have this starting problem repaired, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose and repair this.

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

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: Approximately, how long will a warranty last on a replaced or resealed valve cover gasket?

The engine valve cover gasket should last for about 8 to 12 years. If the gasket is leaking, then the PCV (Positive Crankcase Ventilation) valve is plugged up causing the engine to build up too much crankcase pressure blowing out...

Q: Do I have a damaged head gasket?

Hi there. This can be a bad head gasket or it may be something much smaller. If the coolant temperature gauge is staying in the normal range then it may just have a leak in the system. If there is...

Q: Loud grinding noise coming from engine

Hello. If there is a loud noise like that coming from the engine accompanied by a misfire and fuel from the exhaust, then you may have a valve timing problem. It may be a failure in the timing chain. I...

Related articles

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...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...