hummer H2 with a big problem

[benjr]

HI all i have a 2003 hummer H2 with 8K miles on it, last night the check engine light came on and i scanned it and came up with codes, p0200, injector circuit malf, p0302, injector 2 misfire, and a gross evap leak, the truck has no power, and runs like ________, just some info on it, it has a whipple supercharger, headers, full exhaust, cold air intake, and programer. the truck is now out of warranty, and i dont want to pay the dealer prices to fix it, do any of you have any ideas what the problem could be? my guess is that the injector is bad causing the misfire, but i have no way of telling if the injector is bad. to get to that bank of injectors yoy need to remove the supercharger, any help would be great

 

[Rickey]

Wild guess follows, may bear no resemblance to actual problem.
Positive manifold pressure from blower blew evap return hose off, creating vacuum leak, hose impacted electrical connection to injector # 2.
Good luck. Rickey.

 

[Carbonics]

wow, gotta pay to play I guess... 3 years and 8k and it's out of warranty? what the?

 

[acewiza]

Sounds like it spends more time getting go fast parts installed than actually using them on the road. No offense, I have a couple of those type vehicles myself. But anyways, I'll wager Rickey nailed it, or darn close.

 

[JTK]

Is this an atlas inline 5cyl? Like Rickey suggested, check/listen/feel for a loose vac line. The evap stub on the atlas engines is right on the throttle body.

Joel

 

[sxg6]

Did you install the mods yourself? If not, take it back to the place that did and ask them.

 

[Matt_S]

Quote:

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Is this an atlas inline 5cyl?

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No. The H2 sports the 6.0L V8 this year (not sure about 03), but the H3 is the one with the I5.

I'd also bet that Rickey is right and you only have a vaccuum leak. If that's not the case, I'd bet on that injector.

 

[JustinH]

sounds like an air leak.

Did you get this thing tuned on the dyno for the blower?

Depending on who did the tune, i'd take a look at the plugs, if they are throwing too much fuel into the mixture, it might have fouled that plug.