Hummer H2 For those who like a little more gleam to their Hummer, the H2 offers a similar rugged look as the H1, but as a lower cost, and with more added features, making it almost a massive luxury SUV.

Flashing Check Engine Light

Old Dec 10, 2025 | 04:54 PM
  #31  
mudking's Avatar
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So I got warmer weather and swapped out the sprk plugs, number 3 looked the worse for sure and number 1 was a bit better the rest didn't seem as bad. I can rev up to 3k or 4k rpm and don't see any flashing CEL. I tried with a multi meter and can get around 4 or 5 k ohm except for one plug I'm pretty sure it was number 3,
when im reving up to 3 or 4k in park i do see the odd misfire like a cylinder 6 or 8 or 7 etc. Nothing like before where there were hundreds of misfires. Is it normal to see the odd misfire when reving up the engine?






 
Old Dec 10, 2025 | 05:30 PM
  #32  
mudking's Avatar
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So I got warmer weather and swapped out the sprk plugs, number 3 looked the worse for sure and number 1 was a bit better the rest didn't seem as bad. I can rev up to 3k or 4k rpm and don't see any flashing CEL. I tried with a multi meter and can get around 4 or 5 k ohm except for one plug I'm pretty sure it was number 3,
when im reving up to 3 or 4k in park i do see the odd misfire like a cylinder 6 or 8 or 7 etc. Nothing like before where there were hundreds of misfires. Is it normal to see the odd misfire when reving up the engine?







 
Old Dec 11, 2025 | 08:00 AM
  #33  
legerwn's Avatar
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Hopefully that will fix it, time will tell
Sometimes we miss the easy stuff,
I think with your cam you will probably see random misfires, I do on my tuck but usually its around idle speeds

Neal
 
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