Skip the auto shop - Our mechanics make house calls

Q: Car stalls when it is heated up

asked by on

Hello. My car starts having issues when it warms up. It would stall and occasionally turn off completely. This happens especially at higher speeds and gets worse when the outside temperatures are higher. I took it to the shop many times. They replaced MAF sensors numerous times along with a couple of new fuel pumps. There was an evaporation leak that was fixed as well. I also had the computer chip replaced. When the scanner was hooked up before, it indicated issues with the MAF sensor and fuel pump. Now, there are no codes and the mechanic couldn't diagnose it. The car would run fine until it is heated up. I had the belts, hoses and filters checked. Everything is fine there. What could cause this stalling and so many bad MAF sensors? Thanks.

These vehicles have a lot of issues with the wiring modules and harness connectors. The pins and connectors are really small and can loose contact really easily. The reason the MAF and fuel pump is going bad is not the sensor or pump more than once, but the wiring to the sensor or at the ECM losing contact to these items in the connector. Have the ECM wire connector and MAF connector tested and checked for loose fitting or corroded pins. A technician from YourMechanic can conduct these tests to diagnose your stalling issue and proceed with the correct repair.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: I can't get my 98 silverado to start

If adding fuel "directly" to the intake causes the engine to start, that could mean the fuel filter is blocked, there is a faulty pressure regulator on the fuel rail, the injector(s) are not functioning electrically and/or are plugged, the...

Q: Car dies on exit ramp coming off interstate

Hello. I will be happy to assist you. I believe the problem you are having could be a result from a faulty mass air flow sensor or a throttle position sensor. Each component heavily inputs on the air fuel ratio of the vehicle....

Q: Car won't start no power to injectors

Hello. No power to the fuel injectors can be caused by a few things. If the relays, fuses, and computer all check out then I would move on to looking at the engine management and fuel system. It may be...

Related articles

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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.