Skip the auto shop - Our mechanics make house calls

Q: F-150 will not run when it is over 70 degrees

asked by on

F-150 1994 with a 302 V8. If it's over 70 degrees ambient air temperature, it won't run. If it's below 70, it runs just fine. Have you ever heard anything like this?

I see stuff like that all the time. A lot of times it’s the temperature sensor for the computer that has gone bad. It tells when the engine is hot and when it’s cold. If it gets too hot outside, it might be shortened out, giving the wrong temperature. Then it gives the wrong amount of fuel to the engine. Then the thing just shorts out. Check that first and also you might have to get the main computer checked, because I’ve seen many computers, sometimes when it gets too warm, they just start to short out. It could be the main computer too. Have the car inspected in person by a technician, such as one from YourMechanic, they will be able to determine if there is an overheating issue that is causing a problem.

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: Purchased new computer,does it need programed,if so who does that

Try to hook it up to your B2500 and see if it will start and run. If it does then your okay to go with out programming. If not then you would need to have a dealer program it after...

Q: Coolant depletes quickly

The temperature gauge issues may be the result of a faulty coolant temperature sensor or a low coolant level. If there is no coolant in the system, the sensor cannot read temperature accurately. It would be best to consult the...

Q: How do I disable the Easy Entry feature?

For your comfort when entering and exiting your vehicle, your truck comes with a feature called Easy Entry. This feature will automatically move the driver's seat back a few inches when you are getting in or out of the truck....

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...