Runs and then shuts off

1996 FORD THUNDERBIRD

121,000 MILES • 3.8L • V6 • 2WD • AUTOMATIC

ROSCOE6355

MEMBER
2 POSTS
FOLLOW

Runs really well for twenty to thirty minutes, and then stalls and is hard to start. Replaced almost every sensor in it. This all started from a radiator hose that blew and shorted out stuff. I am at my wits end . What can it be?

Oct 31, 2017 at 12:22 PM

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STRAILER

AUTOMOTIVE REPAIR CONTRIBUTOR
54,178 POSTS

To me it sounds like you have a main power (constant control) relay that is worn and fails when hot or the ECM is going bad doing the same thing. Here are some guides and diagrams so we can see whats going on when the engine stops running.

Does the engine lose spark or fuel?

https://www.2carpros.com/articles/how-to-test-an-ignition-system

and

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Here is a guide to check the main engine computer relay

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Here is its location (below) if everything checks out I would get a used ECM engine control computer and plug it in.

Please let us know what happens.

Cheers, Ken

Images (Click to enlarge)

Nov 2, 2017 at 11:04 AM

ROSCOE6355

MEMBER
2 POSTS

Very informational, but replaced Cam Shaft Position Sensor, runs like a champ again, really replaced most of the sensors, check all radiator hoses and changed out two more. Hot water and sensors don't mix

Nov 4, 2017 at 9:07 PM

STRAILER

AUTOMOTIVE REPAIR CONTRIBUTOR
54,178 POSTS

Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help

Cheers, Ken

Nov 5, 2017 at 1:33 PM