Hey Scotty! Im desperate! My 2000 chevy malibu keeps shutting off on me in mid drive. Ill be going down the highway and the car turns itself off and not one person can tell me whats wrong with it. I replaced the crank shaft position sensor and it still dies the fuel pump is fine fuel pressure is fine. I thought maybe a bad temp sensor or bad coolant sensor it's been diagnosed three different times. One code was for the evap the other for the coolant sensor another code was for a temp sensor because it was unplugged we plugged it back in and it drove fine in the city for 2 days. After i tried to drive home to Colorado on the highway it was fine at 75mph for about 10 minutes and it died im always able to get it started again but when i started it back up on the highway it didn't want to go over 55 and died again. Someone told me it could be a coil pack but im not sure i have had several different people look at it and not one can tell me what it is. The check engine light was on when i bought it but went off after i plugged the temp sensor in and now it hasn't come back on. Please help me i dont know what to do and I'm just trying to get back home to my family before the holidays.

Comments
No. 1-5
RustyDusty
RustyDusty

I had a 1998 Malibu that started doing the same exact thing at 278,000 miles. Turned out it was the ignition theft deterrent that started to malfunction. When it malfunctions it shuts off power to the fuel pump making you think it’s a fuel pump problem. It’s really a safety/electrical problem. Every Chevy I have owned has had electrical problems that cause the most annoying things go wrong. Hope this helps!

Zoeysmommy0412
Zoeysmommy0412

Idk if it can be a bad battery because all the elctric works on the car even when it dies and turns back on all electric is fine

Zoeysmommy0412
Zoeysmommy0412

I did not test the idle control valve the car didnt have a battery when i got it i bought a used one ill check the date and let you know the mechanic did tell me he cant find out what's wrong with it til he drives it and it dies

Techsus
Techsus

100% concur w/ Mr. Kilmer. Curiosity-- did you test for idle control valve, which when faulty infamously causes engine to stall out? Meanwhile, at AutoZone, ask for free load test-- battery/alternator both. What's the date on your battery?

Scotty Kilmer
Scotty Kilmer

Editor

only way to figure it out is to have a guy like me drive it till is drops, then analyze live and mode 6 recorded data. Otherwise, pure guesswork