Stumbles on cool start up
#22
Have you performed an induction service?
I'm currently doing my annual service on mine right now, got the tank from penray rep(pic below). Add a 1/2 can of seafoam, adjust the flow( a slow drip) and run at 1800rpm until the tank empties. Seafoam also carries a spray can with a long hose attached that you can try:
I'm currently doing my annual service on mine right now, got the tank from penray rep(pic below). Add a 1/2 can of seafoam, adjust the flow( a slow drip) and run at 1800rpm until the tank empties. Seafoam also carries a spray can with a long hose attached that you can try:
Thanks for the help!
#23
Well, this seemed to work. Used the spray can and followed the video procedures. Still got quite a few misfires right afterwards, but drove around a bit and they stopped. Have cold started a couple of times since then and no misfires reported.I think that indicates it was a sticking valve issue, just need to see if it comes back. Since the Hummer isn't a daily driver, sitting up seems to cause it to misfire more.
Thanks for the help!
Thanks for the help!
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