Chevy Trailblazer Stalling

[Nick1994]

The 2002 Chevy Trailblazer (105k miles) has stalled several times lately. Every time it has been when sitting in a parking lot and idling. The first time it was idling and I touched the gas pedal and it died. It fires right back up.

No check engine lights, has brand new spark plugs and a clean air filter.

Anybody have any ideas? Thanks.

 

[Warstud]

Have you checked for Codes?

 

[skyactiv]

Clean the throttle body. Get the appropriate cleaner. CRC at AutoZone. Reply back in a day or three if it's fixed.

 

[skyactiv]

Originally Posted By: Warstud
Have you checked for Codes?


You usually won't get codes on the 4.2L with a dirty throttle body.

 

[SrDriver]

+1 on a dirty throttle body. Had the same problem.

 

[Warstud]

Originally Posted By: skyactiv
Originally Posted By: Warstud
Have you checked for Codes?


You usually won't get codes on the 4.2L with a dirty throttle body.


Your assuming it's the Throttle Body which it very well could be.

 

[SnPb]

As others have said. Clean the throttle body. When it gets dirty on the 4.2 the symptom is stalling at idle. Cleaning the throttle body resolved this issue on my trailblazer.

 

[BrianF]

when they say clean it, we mean disconnect the battery and take the whole TB off and clean the back of it as well. Clean out the little port for the purge canister too. Clean the MAF sensor while you are at it. I had this problem with around 40,000km and the dealer did it under warranty. I clean everything every 30 or more thousand.

Disconnecting the battery will allow the computer to reset and it will re-learn how to drive with a clean TB.

 

[Nick1994]

Ok I'll clean it and the MAF sensor this week and see how it does. It needed gas so just for the heck of it I filled it up with Shell 91 octane.

 

[another Todd]

Ignition switch? That was a common complaint, stalling, then millions were recalled.

 

[Nick1994]

Originally Posted By: another Todd
Ignition switch? That was a common complaint, stalling, then millions were recalled.
Well it doesn't just shut off, it stumbles before dying. It tries to save itself.

 

[Falcon_LS]

'02-'05 vehicles don't come with a MAF sensor. Check your camshaft sensor and exhaust cam phaser.