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Go Back   Hummer Forums by Elcova > Hummer H2 Discussion Forums > Technical Discussion and Customizing your H2

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  #1  
Old 03-29-2009, 05:06 PM
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Default Help!!! I've got Supercharger Problems...

Yesterday was the big day to install my Magna Charger! I had a couple bumps in road but by 6am I was ready to start it up......here's the problem....It barely runs. It's sounds real bad like knocking and like it's running on 2 cylinders. I checked all my wire connections, injectors etc. I was thinking I had an injector plugged into the wrong cylinder?????

The thing that really stinks is it's Sunday and there is no Tech Service......So I'm hoping maybe you all may be able to HELP!!!!

Thanks,
Mike

BTW - I bought my SC used and it was off an 03.....I got everything from magnasun that I needed, but come to find out the intake gasket wasn't even close to fitting....the gasket on the SC intake was perfect but can you guys/gals w/03's confirm the gaskets are single inserts?

Last edited by KANE : 03-29-2009 at 06:11 PM.
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Old 03-29-2009, 05:34 PM
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Default Re: Help!!! I've got Supercharger Problems...

Did you put in the fuel pump required for 03's?

Does it idle decent? Reprogram for the blower?

Sounds like you had a late night...I've done some stupid **** being tired and not thinking right. Sometimes its better to have a second pair of eyes looking to catch your oversites.

Did you do any other mods at the same time? headers, etc...
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Old 03-29-2009, 06:07 PM
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Default Re: Help!!! I've got Supercharger Problems...

Thanks Mud! You couldn't be more right about a late night and a struggling brain!
I got a bew intank fuel pump & fuel rail regulator for my 2005 from Magnusun along with a Superchips programmer specific to my Vin. The program seemed to take without any failure on the handheld...???

Truck is completely stock. 2005 w/33k

The truck runs really bad...like 1 - 2 cylinders, it pops and knocks and dies. I re-ran the program and had the same results. I then checked all the electrical connections, which seem fine but I keep thinking I may have screwed up the injector sequence. they look fine.....I just don't know.

I'm sooo open to suggestions and I'm going back to work on it again soon and will keep checking this often if you think of anything........If for any reason I figure it out I'll post details.

I really appreciate the help!

Last edited by KANE : 03-29-2009 at 06:10 PM.
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Old 03-29-2009, 06:20 PM
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Default Re: Help!!! I've got Supercharger Problems...

Did you use the programmer from the 03 that came with the SC? You may need the programmer for the 05? Check your fuel rail pressure as well?
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Old 03-29-2009, 07:06 PM
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Default Re: Help!!! I've got Supercharger Problems...

No I got a new programmer for the 05......how would I check the rail pressure? Thanks H2R
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Old 03-29-2009, 10:01 PM
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Default It's Fixed!!!!!!!

Well it's fixed and it's Awsome!!!!!! The problem was the old fuel that was in the rail and it had some air in there as well. I cleared the valve 5 - 6 times and it was alot better...I let it run and it burned off the old fuel and it cleared out completely!!!!! Thanks again for the advice...just reading a couple of replys got me thinking simple again and fixed it w/out much effort!

Thanks Again!!
Mike
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