starting issue
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starting issue
Recently I been having weird starting problems with 2007 hummer h3, sometimes the car will crank but won't start keep cranking and pressing on gas and eventually starts, sometimes it start right away, I have new battery terminals end cus you recommended me before to change them so those been done for a while and the battery is recently new like few months ago, and I checked it and its healthy. checked the battery wires they are tight and good. my ECU is tuned so my pass lock is disabled. it just started few days ago. no check engine light. is it the starter? ignition switch? I am trying to figure it out, and any help I would appreciate it
Last edited by NFS; Jun 18, 2019 at 07:45 AM.
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Senior Member
Joined: May 2016
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I always put seafoam I cleaned the maf and put spark plugs not that long ago and throttle body is clean filter is also clean. No codes I just don’t know why it start to happen all the sudden specially I really keep the car well maintained
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How can I check the fuel pressure sir? So when I try to start it if it crank but doesn’t start check it?
Senior Member
Joined: Apr 2019
Posts: 3,201
From: BX NY North East
yes.
you connect the fuel pressure gauge to your injector fuel rail. if there is no pressure or very low pressure then you are having a fuel starvation or fuel delivery issue most likely from a failing/ clogged fuel pump or bad fuel pump connections. some scanners will show you fuel pressure and also manually turn the pump on or off. a GM tech2 scanner can definitely accomplish that.
you connect the fuel pressure gauge to your injector fuel rail. if there is no pressure or very low pressure then you are having a fuel starvation or fuel delivery issue most likely from a failing/ clogged fuel pump or bad fuel pump connections. some scanners will show you fuel pressure and also manually turn the pump on or off. a GM tech2 scanner can definitely accomplish that.
Thread Starter
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Senior Member
Joined: May 2016
Posts: 739
yes.
you connect the fuel pressure gauge to your injector fuel rail. if there is no pressure or very low pressure then you are having a fuel starvation or fuel delivery issue most likely from a failing/ clogged fuel pump or bad fuel pump connections. some scanners will show you fuel pressure and also manually turn the pump on or off. a GM tech2 scanner can definitely accomplish that.
you connect the fuel pressure gauge to your injector fuel rail. if there is no pressure or very low pressure then you are having a fuel starvation or fuel delivery issue most likely from a failing/ clogged fuel pump or bad fuel pump connections. some scanners will show you fuel pressure and also manually turn the pump on or off. a GM tech2 scanner can definitely accomplish that.
Senior Member
Joined: Apr 2019
Posts: 3,201
From: BX NY North East
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Joined: Jun 2019
Posts: 69
From: Scranton, PA
I was just reading this thread and immediately though this sounds fuel related. I had a '13 a Charger SRT8 that had the same problem. Turned out to be "cold enrichment" injector that went bad. Guess that car had a 9th injector for this purpose.....never looked into it to confirm. It was a warranty repair.
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Senior Member
Joined: May 2016
Posts: 739
I was just reading this thread and immediately though this sounds fuel related. I had a '13 a Charger SRT8 that had the same problem. Turned out to be "cold enrichment" injector that went bad. Guess that car had a 9th injector for this purpose.....never looked into it to confirm. It was a warranty repair.
Thats crazy how to check the injector ?
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