Skip the auto shop - Our mechanics make house calls

Q: Shuts off and won't start for about an hour or so

asked by on

New fuel pump new ECM car shuts off going down the road after driving about 30 minutes will not crank for an hour or so. Sometimes when you shut it off at a store it will not crank for an hour or so after being drove. Not sure what else to check. Any help will be grateful

My car has 202000 miles.
My car has an automatic transmission.

Hi there. From the description you have provided concerning your vehicle’s drivability problem, it hard to discern whether it does not turn over, or it does not start for about an hour after driving. If your vehicle will not turnover (crank), it could be the starter becoming faulty when hot.

If your vehicle will not start, it could be a problem with the new fuel pump installation or the new pump itself. Delphi replacement fuel pumps have recently had high failure rates.

It could be also be any number of electrical components failing with increased temperature (i.e. a fuel pump relay, ECM (engine control module) relay, crankshaft position sensor, etc.)

Assuming, the Check Engine Light is not coming on. This leads me to believe the ECM is not recognizing the fault. If you need more help having this taken care of, I recommend having your vehicle’s starting issue diagnosed in person so that you can get your car safely back on the road.

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: Will not start back up

Hello there, many faults will cause your 1997 Chevrolet Cavalier to die and not be able to be restarted. The most common faults are with the battery, alternator, battery cable, fuel pump, fuel filter, wiring harness fault, or MAF sensor....

Q: When putting my truck into reverse and let off the brake its starts squealing until I put it into drive. I think its the U joints

Hi there. What you are describing could be caused by multiple components being worn out or faulty, ranging from a U-joint to input shaft or even non-related to the driveline - such as a worn out serpentine belt or pulley....

Q: Car won't start

Without testing, it will be very difficult to determine what is wrong. That being said, there are a few things that pop into mind. The mesh wire you see may be a ground strap. It is very important that the...

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...