Hummer Forums by Elcova - paxton sprchrgd h2 problem!?

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- - paxton sprchrgd h2 problem!? (http://www.elcovaforums.com/forums/showthread.php?t=15384)

S/C H2

11-19-2003 03:20 AM

I have been working on this problem for a week now, maybe some one has some info. Under acceleration at 4200 rpm the engine cuts out and wont shift unless I back off the gas then it shifts fine and check engine light is on. I have the Paxton Novi 1200 series supercharger. Any suggestions are appreciated!

S/C H2

11-19-2003 03:20 AM

argonaut

11-19-2003 07:55 AM

maybe take the supercharger off... ???

Patriot

11-19-2003 11:05 AM

Buy a Whipple???

Sorry ...couldn't resist...

Sounds like an a knock sensor may be picking up some detonation and cutting power??

AUBURN H2

11-19-2003 01:11 PM

Did you use a reprogramer after you installed the Supercharger? Had a Whipple on one of my H2's and it ran terrible until I used the programer.

H2 Bill

11-19-2003 04:08 PM

My guess is that the torque management is kicking in. I had the same problem with my Whipple and had do have the PCM custom tuned and the T/M removed. I had mine before Whipple had the programmer to fix the problem. If I were you I would buy the Predator programmer and that should solve your problem.

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S/C H2

11-20-2003 02:27 AM

Thanks alot for all your help. I heard it was also plugged catalytic converters so we took the cats off and ran it down the street and the h2 ran and shifted like it should, so I will replace with new cats and muffler and should solve my problem.

S/C H2

11-21-2003 03:53 AM

well we put the new cats on today and it still acted up, so after 3 hrs of pulling hair my brother decides to go back to basics and found a plugged up fuel filter and cost $6.99 This fixed our problem and it runs great!!

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