Hummer H3 For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.

2006 H3 with error 449 and 300

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  #1  
Old 10-18-2020, 07:18 PM
Dion Phinney's Avatar
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Join Date: Oct 2020
Posts: 1
Default 2006 H3 with error 449 and 300

Hey...I have looked at all the posts about the 2 error codes but have not seen my main issue with probably the evap system. When I start it up the engine revs up and down to the point it will stall or close to it but after about 1 min of me pumping the gas it works like a charm for the whole time I run it and for the day. But the next time I start it I go through the same issue with the initial startup and it revving and wanting to stall. Any help or direction? tyia
 
  #2  
Old 10-18-2020, 11:20 PM
Happy Hummer's Avatar
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Join Date: Oct 2011
Location: Wisconsin
Posts: 1,405
Default

Start with the basics.

* Spark plugs
* C.O.P
* Clean TB
* Clean MAF
Follow this link
https://sites.google.com/site/happyh...valve-solenoid

https://sites.google.com/site/happyh...0449-resources


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