Engine will not crank over?

WHEND88

MEMBER
2004 CHEVROLET IMPALA
3.8L
6 CYL
2WD
AUTOMATIC
259,113 MILES

Okay, I have the car listed above and it won't crank or start. I have replaced the alternator, the battery, the starter, the fuel rail, the upper intake manifold, fuses, and relays. My anti-theft system keeps preventing the car from starting. I have reset the brain, tried bypassing the theft system and have reset the settings and everything using the display button. Nothing has worked please help. I have tried disengaging the anti-theft system. I've tried resetting everything. 259,113 is the mileage and I also replaced the ignition control module. And that when I go to start it it's like it just loses all power when turning the key, but power comes back in the car after I quit turning the key.

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
43,072 POSTS

First, I would have the battery load tested or you can use this guide below. If the battery comes back okay, I would replace the positive battery cable and check to make sure the negative cable is connected to the engine block, and it is clean and free from corrosion.

https://www.2carpros.com/articles/car-battery-load-test

Here is how to change out the positive cable in the diagrams below. Also, I would double check the starter motor, it could be defective.

This guide can help as well:

https://www.2carpros.com/articles/starter-not-working-repair

Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.

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