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.

07 H3 starting issues

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Old Dec 26, 2023 | 01:55 AM
  #1  
BLK07H-3's Avatar
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Default 07 H3 starting issues

I have a problem maybe some has suggestion or input

my H3 some time starts like a champ others on a daily basis I crank it over and it makes a clunk then I turn key to off position and try again and it starts 90% of the time I have noticed if I put key in and turn to on position for 1 minute it will usually start right away idk what to do new starter alternator both cam sensors crank pos all new parts checked all grounds replaced battery terms too. Also it has no trouble codes
Its 07 with 3.7 and 185k miles
 

Last edited by BLK07H-3; Dec 26, 2023 at 01:57 AM.
Old Dec 26, 2023 | 11:54 AM
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May we assume that you are no longer trying to use the crappy azzed OEM Battery Terminal Connectors?

Have you inspected the starter wiring connections for corrosion or compromise? As old as these trucks are, poor connections are always a possible issue, especially with the load crated at the starter/solenoid.
 
Old Dec 26, 2023 | 03:56 PM
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Originally Posted by Doc Olds
May we assume that you are no longer trying to use the crappy azzed OEM Battery Terminal Connectors?

Have you inspected the starter wiring connections for corrosion or compromise? As old as these trucks are, poor connections are always a possible issue, especially with the load crated at the starter/solenoid.


I am using stinger connectors all wiring looks good tested current through them and it was good
 
Old Dec 27, 2023 | 09:39 AM
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OK, then spray the ignition switch with CRC. Pics courtesy of hummerz.



 
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