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.

Hummer h3 cold start problem

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Old Feb 12, 2020 | 12:46 PM
  #41  
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Originally Posted by bronxteck
try the relays first before changing out the MAF sensor as it is wise to go from the cheapest option to the most expensive when troubleshooting issues.
yes I will . I will disconnect the battery and clean the relay ports and then install the new relays and see if it still does it if it still then I’ll install
the new maf and see. The parts should arrive in few days
 
Old Feb 12, 2020 | 08:25 PM
  #42  
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Save yourself money, by opening up a can, or 2




 
Old Feb 12, 2020 | 08:59 PM
  #43  
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Originally Posted by hummerz
Save yourself money, by opening up a can, or 2



I need to get that electrical cleaner I used the same cleaner for the maf and I also have the other one for throttle body mad and throttle body is clean but that electrical cleaner will come handy to clean that fuse box
 
Old Feb 13, 2020 | 04:45 PM
  #44  
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Get a Scan Guage II and get codes to see what is happening real time...
 
Old Feb 13, 2020 | 04:51 PM
  #45  
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Originally Posted by wpage
Get a Scan Guage II and get codes to see what is happening real time...
the mechanics already scanned and didn’t find anything. No codes
 
Old Feb 24, 2020 | 08:01 AM
  #46  
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UPDATE

so I got the fuses, the new MAF sensor and I also got a new crankshaft sensor just for the hell of it, installed the new crankshaft , disconnected the battery and sprayed electrical cleaner on the fuse box installed new fuses after it dried off I even cleaned battery terminals and installed another battery terminals because the ones I had before were aftermarket but really old. Started the car no problem. This morning it was 55 degrees. Crank it stars right away! That’s great. We will monitor it for few days specially on cold days to make sure it still starts fine. I hope that resolved the issues. I will Keep you guys updated . Wife says the car drives better too after replacing the maf sensor so we shall see . I appreciate everyone’s help I’ll update in few days
 
Old Feb 27, 2020 | 04:04 PM
  #47  
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Originally Posted by NFS
UPDATE

so I got the fuses, the new MAF sensor and I also got a new crankshaft sensor just for the hell of it, installed the new crankshaft , disconnected the battery and sprayed electrical cleaner on the fuse box installed new fuses after it dried off I even cleaned battery terminals and installed another battery terminals because the ones I had before were aftermarket but really old. Started the car no problem. This morning it was 55 degrees. Crank it stars right away! That’s great. We will monitor it for few days specially on cold days to make sure it still starts fine. I hope that resolved the issues. I will Keep you guys updated . Wife says the car drives better too after replacing the maf sensor so we shall see . I appreciate everyone’s help I’ll update in few days
ANOTHER UPDATE:

The car seem to start right away and it sound like the problem got resolved. Thank you guys so much for helping me fix this problem that other 3 local mechanics couldn’t figure out! Anyone in the future have the same problem make sure to check the relays, crankshaft sensor and lastly the maf sensor
 
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