Loss of Power & Traction Failed,ck eng light

[giovannihdzretir]

I had put my H3 at the Dealership since I had 2/4 mechanics to ck it out they ran Diagnostics that ran me abt $100/300 ea time so this time I said freak it, I'm sending it to the dealership which it took them 2 wks to get it running plus $600 they also replaced the TCM, also a part where the shift connects on the bottom, it ran good for 2 day's then all of a sudden it ran ruff as hell couldn't even go over 20 mi, it was worse then,it was before it went to the shop. Now its bk in the shop they told me it will b at least 2 wks before they start..OMG..but I got a loaner.. The lady also told me that they don't hardly wrk on Hummer's any more.is this true? She says a lot of mechanic won't work on them..ugh so freaking tired.lol but oh well we will see what happens..

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[4speedfunk]

She says a lot of mechanic won't work on them

Yup. That's why we share our DIY info on this website. (try new battery cables).

 

[CaseyS]

Are you getting a reduced power message in addition to the traction failed?

 

[giovannihdzretir]

Are you getting a reduced power message in addition to the traction failed?

Yes

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[08H3]

It's hard to stress enough how important the battery cables are on an H3. I had an intermittent issue where the clock would reset on start. Tightened the connections, and problem solved. That was even with Mil-Spec terminals. The oddball factory setup has to make things even worse.

 

[CaseyS]

My experience is reduced power is either throttle body or accelerator pedal related. Check the connectors at both of those. I also had similar problems with plugged sunroof drains soaking the carpet on the passenger floorboard which shorted one of the connectors going to the BCM located in the kick panel.

Hopefully this is someplace to start.

 

[Mr_Rich]

Follow CaseyS's advice. You're going to get soaked for a bunch of expensive parts and considering the experience that myself and others have had on this site you likely have a failing throttle body. They will behave very flaky with intermittent faults that may lead you down an expensive path if you don't replace the throttle body first.

 

[giovannihdzretir]

Thanks everyone, I had put a new throttle body, plus battery

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[Simplelife]

I had a black wire that's by the throttle body cut , and gave me those same symptoms .. once I reconnected it all went away