H2 Engine Misfire
#1
H2 Engine Misfire
I have a 03' H2 with a Magna Super Charger (here's the web site for those who may be interestedhttp://www.magnacharger.com/sc-hummerh2.htm) which has been working great for over 3 years. However just recently I started noticing a slight engine misfire when the engine is idling, and then today when I started the engine the missed fire was very evident. The engine RMP goes from around 1000 down to 350 and back up. I have a Hyper Tech on board (http://www.hyperpac.com/) and when I check for codes it read P0300 which says "Radom/Multiple Cylinder Misfire Detected". Can anyone direct me to the most likely area to check out? Has anyone ever experienced this problem?
#7
RE: H2 Engine Misfire
Spoke to a tech friend (top notch Hummer Mechanic)who suggested to start out with the most likely stuff, like changing out the fuel filter,plugs,wires and clean out the Airfilter. I have one of those Ram Inductionair filters which you clean and re-install.. The fuel filter makes alot of sense. Since I have a supercharger with duel fuel pumps the filter is working twice as much. By the way in addition to the supercharger I have also installed theStage IIB kitfrom Breathless Performance which has really made the supercharger sweet. Here's the link to Breathless Performance http://www.breathlessperformance.com...0Stage%202.asp.
After doing all that typical tune up stuff, he saidif I'm still having trouble have the injectors cleaned out.I will keep you all posted. Thanks forall theadvise.
After doing all that typical tune up stuff, he saidif I'm still having trouble have the injectors cleaned out.I will keep you all posted. Thanks forall theadvise.
#8
#9
RE: H2 Engine Misfire
Thanks. I heard about this awhile ago froma dealership thathad once worked on my daughter's car which had an EGR problem. It seem to have help. I will give it a shot. How often do you think I could use it?
#10
RE: H2 Engine Misfire
To start with one canper the next two tank fulls..let the tank go almost empty before refilling.
I use it in my Jag and Hummer, one can at every oil change (5000 miles) and RedlineSI-1, one bottle every 1000 miles
I use it in my Jag and Hummer, one can at every oil change (5000 miles) and RedlineSI-1, one bottle every 1000 miles