20 Most Recent 2009 Hummer H3 - Page 9 Questions & Answers

My h3 keeps stalling when braking at the lights and when turning a corner or bend going down to 0 revs

im sorry i said before it has 3..i was incorrect that engine has the coils right on top of the spark plugs...one for each plug Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/sean_54c3a3dc48a7773c

My dealer finally found the problem on my 2008 H3. It was misfiring cylinder 1. The coil was bad so they replaced the plug and coil and its not back to normal. there was actually water (moisture) in the coil and spark plug. I have seen on other forums that this is a known problem. Also had the injectors flushed and it runs great now.