Car loses power at 60 mph

BIGT1984

MEMBER
2002 CHEVROLET TAHOE
5.3L
V8
4WD
AUTOMATIC
21,500 MILES

My car loses power at 60 mph and turns right back on. What could it be?

Sunday, June 16th, 2019 AT 2:15 AM

5 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good morning,

Does it shut off?

https://www.2carpros.com/articles/engine-has-low-power-output

Are any lights on? Are there any codes?

https://www.2carpros.com/articles/engine-stalls

I need as much information as you can give me.

Roy

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Sunday, June 16th, 2019 AT 4:39 AM

BIGT1984

MEMBER
3 POSTS

All the lights come on the dash and then hit shuts off and turns back on. My ex tuned it up and gaped the spark plugs. I think it might be the problem.

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Sunday, June 16th, 2019 AT 4:48 AM

ASEMASTER6371

MECHANIC
52,797 POSTS

Did it actually turn off while running?

Roy

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Sunday, June 16th, 2019 AT 4:49 AM

BIGT1984

MEMBER
3 POSTS

Yes turns off then turns back on.

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Sunday, June 16th, 2019 AT 4:58 AM

ASEMASTER6371

MECHANIC
52,797 POSTS

Okay, Did you have the codes checked?

This sounds like it could be a crank sensor.

Roy

1. Disconnect the negative battery cable.
2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle.
3. Remove the starter.

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4. Disconnect the crankshaft position (CKP) sensor electrical connector.

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5. Clean the area around the CKP sensor before removal in order to avoid debris from entering the engine.
6. Remove the CKP sensor retaining bolt.
7. Remove the CKP sensor.

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