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.

2007 H3 wont fire.

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Old Dec 9, 2016 | 10:07 AM
  #1  
SteveSS's Avatar
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Default 2007 H3 wont fire.

It's been a little slow in firing lately, couple of turnovers before it catches. I know about the theft control trick and I've left the key off for 10 minutes or more. Still no fire. Shot some starting fluid down the MAF sensor, nothing.

I did buy the key lock thingy that is supposed to stop the anti theft interference but never installed it. Not sure i can even find it now. It was also extremely cold yesterday. 0 degrees and snowing. Put some Heet in the tank, nothing. Had it out the night before and it was fine.

If anyone has some ideas I'm all ears.

Steve
 
Old Dec 9, 2016 | 11:56 AM
  #2  
Happy Hummer's Avatar
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From: Wisconsin
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Hi,
* Battery connectors
* Battery
* Ground wires
Replace the connectors...Replace the battery...Clean the ground points at the frame and sheet metal throughout the engine bay area.
 
Old Dec 9, 2016 | 01:52 PM
  #3  
Doc Olds's Avatar
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From: Boat Town USA MI
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You mean it is turning over but does not start? Is the security light illuminated on the dash?

The little lock thing
 
Old Dec 9, 2016 | 02:44 PM
  #4  
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Yes the engine is turning over fine.

Yes the security light is on.

The part I have, that I haven't installed is about 5 inches long and has a black and white plug at one end. If I knew what it was called maybe I could look up how to replace it.
 
Old Dec 11, 2016 | 08:07 PM
  #5  
TAINTER's Avatar
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From: SE Michigan
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Passlock
 
Old Nov 17, 2019 | 12:07 PM
  #6  
Aprild's Avatar
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Default Hummer h3 2007 anti theft lock 🔐 won’t start

I purchased a by pass module and it worked I drove it shut it off and now it won’t start again.
 
Old Nov 17, 2019 | 04:35 PM
  #7  
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From: BX NY North East
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did the pass lock light come back again? read the instructions maybe it needs a relearn for your bypass module.
 

Last edited by bronxteck; Nov 18, 2019 at 12:49 PM.
Old Nov 17, 2019 | 06:01 PM
  #8  
hummerz's Avatar
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Originally Posted by Aprild
I purchased a by pass module and it worked I drove it shut it off and now it won’t start again.
It appears you need a double bypass.
 
Old Nov 17, 2019 | 09:52 PM
  #9  
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So buy a second one and put that in also?
 
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