Husband was changing oil and after car refused to start and said reduced power.

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Cleaned the throttle body and checked connections. Disconnected battery, cleaned terminal and connections. Nothing! It tries to turn over but won't. Started pushing in all terminals checking for loose connections while I tried starting it. When he pushed in on map sensor connector it started but it is rough. Please help!

Danni18187 in Willow Spring NC

Jan 18, 2015

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RepairPal Certified shops can diagnose and repair your 2009 Hummer H3. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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Husband was changing oil and after car refused to start and said reduced power.

What is your question?

Danni18187 in Willow Spring NC

Jan 18, 2015

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asksteevieson Jan 18, 2015

Disconnect map and see if its fine.

Danni18187on Jan 18, 2015

we did and still nothing.

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Hummertechon Jan 22, 2015

Can you see if the security light is in when you're cranking?

Danni18187on Feb 13, 2015

Okay now let's add something else to the mix. We just replaced the O2 sensor's right before that happened I don't know if it's a coincidence or not. Also I read on some forums that the Excelerator petals are producing the same kind of symptoms that we have. Anybody know about or heard of this? - UPDATE: It turned out to be a power relay part which was $12.00. So for anyone else who has some of these symptoms this is what it turned out to be for us.

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Popular Answer

What are the best Hummer repair shops?

RepairPal Certified shops can diagnose and repair your 2009 Hummer H3. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.