Major help needed for my H3 and my sanity!

[Happy Hummer]

It was not the head. It was resolved by replacing the No. 1 c.o.p and by totally replacing the gas cap, vent valve sel, all 5 spark plugs, clearing computer over nite negative battery cable off, 2 bottles of Techron and allot of cleaning...more cleaning...yep more cleaning.

I also had the main ECM/CPU/PCM or whatever its called pulled off fire wall and scoped/DVM leads from there to many other points in the engine bay.

Chris

 

[Mizery13]

Thanks to all. The H3 is running great. New plugs, cleaned throttle body, cleaned MAF and added new coil to #1 cylinder, 2 bottles techron and she is purrfect. Thanks to all who chimed in to help. I am so glad it is fixed and all for about $155.00. There was some water that had gotten into the #1 cylinder. I had not had the recall taken care of with the hood louver. I suspect sustained rain, maybe the prep when cleaning to sell it all resulted in this water in only this cylinder. There was literally water in the COP when I pulled it.

 

[Mizery13]

Result?

You nailed it dude! Thanks :horns:

 

[3Hummers]

Great result. Congrats.