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.

H3 cranks but wont catch intermittently

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Old Nov 29, 2019 | 10:54 AM
  #1  
mrvaper1's Avatar
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Default H3 cranks but wont catch intermittently

hey folks new here and need some advice. my 2007 H3 has, in the last two years, turned over but wont catch 4 times. i found this forum through a google search and saw that some others are having the same issue. first time was in the middle of winter second time was a summer day, two days ago it did it again and this morrning same. all the other times i waited a few minutes and it turned over no problem. a buddy told me to listen for the fuel pump to prime (which i do all the time now) today i didnt hear it whine on the second attempt. i am in no way a mechanically inclined guy and bribe the heck out of my mechanic. so my first question is "does the fuel pump prime itself EACH time or does it only do it the first initial try?" the guy i bought from said he had replaced the pump when he had it so it's only a 2 maybe 3 year old pump. i also this morning saw the anti theft light come on the dash. on one of the threads here someone had suggested getting the ignition switch replaced. others had also asked how to turn off the anti-theft. i didnt see any follow ups to these remedies. can any of you give me a holler and let me know what if anything did or did not work? of course this only happens when you have to be somewhere. so i didnt get a chance to test the 10min thing cause i had to get to work.
 
Old Dec 2, 2019 | 02:29 AM
  #2  
Ricardowelch's Avatar
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Originally Posted by mrvaper1
hey folks new here and need some advice. my 2007 H3 has, in the last two years, turned over but wont catch 4 times. i found this forum through a google search and saw that some others are having the same issue. first time was in the middle of winter second time was a summer day, two days ago it did it again and this morrning same. all the other times i waited a few minutes and it turned over no problem. a buddy told me to listen for the fuel pump to prime (which i do all the time now) today i didnt hear it whine on the second attempt. i am in no way a mechanically inclined guy and bribe the heck out of my mechanic. so my first question is "does the fuel pump prime itself EACH time or does it only do it the first initial try?" the guy i bought from said he had replaced the pump when he had it so it's only a 2 maybe 3 year old pump. i also this morning saw the anti theft light come on the dash. on one of the threads here someone had suggested getting the ignition switch replaced. Mike Cross of AutoGuysLand reviews how long can i drive with a misfiring cylinder. If you have any concern, you can visit this to get more info. others had also asked how to turn off the anti-theft. i didnt see any follow ups to these remedies. can any of you give me a holler and let me know what if anything did or did not work? of course this only happens when you have to be somewhere. so i didnt get a chance to test the 10min thing cause i had to get to work.
Welcome! i think you should post your thread in specific forum as H3 (https://www.hummerforums.com/forum/hummer-h3-17/) in order to get specific solutions or good ideas for your car. Good luck.
 
Old Dec 2, 2019 | 07:40 AM
  #3  
TAINTER's Avatar
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From: SE Michigan
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Is there a red lock symbol on your instrument cluster when this happens.

 
Old Dec 2, 2019 | 02:09 PM
  #4  
Doc Olds's Avatar
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Search GM Passlock.
 
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