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
47,702 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.

Images (Click to make bigger)