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Hummer H3For 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.
Our h3 has pretty severe engine loss happening. It’s at a reputable shop in Denver and they’re having trouble figuring out what is going on so I figured I’d ask here.
What has been done so far: maf cleaned, new spark plugs, throttle body cleaned, new air filter, new fan clutch, ecm reprogrammed.
No errors are being thrown. We aren’t seeing the reduced power error.
any ideas?
Last edited by TechnoSean; Aug 7, 2022 at 01:41 PM.
Stop throwing parts at it! Did your "reputable shop in Denver" check fuel pressure & compression? If fuel pressure is good & low compression, INDUCTION SERVICE(DECARBONIZE ENGINE) FIRST! Btw, there's a DIY kit for that, sit back and watch these:
07 h3 i5 170k miles engine power loss
