PAST FEW DAYS I'VE BEEN HAVING PROBLEM WITH MY RPM GAUGE. IT SEEMS LIKE WHEN I'M SITTING AT IDLE, THE RPM SLIGHTLY REVS UP AND DOWN. A FRIEND OF MINE SAID THAT MAYBE MY THROTTLE BODY NEEDS TO GET CLEANED.

ANY IDEAS?

SEEMS LIKE EITHER WAY, I GOTTA CALL THE DEALER.

2003 White Lux, Alpine Nav/DVD, 3 Screens, Cold Air, Metal Dash/Mats/Steering Wheel, All SMA Chromes, Signal Mirror, Corsa Exhaust, JBA Headers, Diablo Programmer, Nology Plugs & Wires.

PAST FEW DAYS I'VE BEEN HAVING PROBLEM WITH MY RPM GAUGE. IT SEEMS LIKE WHEN I'M SITTING AT IDLE, THE RPM SLIGHTLY REVS UP AND DOWN. A FRIEND OF MINE SAID THAT MAYBE MY THROTTLE BODY NEEDS TO GET CLEANED.

ANY IDEAS?

SEEMS LIKE EITHER WAY, I GOTTA CALL THE DEALER.

2003 White Lux, Alpine Nav/DVD, 3 Screens, Cold Air, Metal Dash/Mats/Steering Wheel, All SMA Chromes, Signal Mirror, Corsa Exhaust, JBA Headers, Diablo Programmer, Nology Plugs & Wires.

Can't speak for the H2.. mine still works fine.. I can say that my old beast , 99 Sub w/ supercharger had the same problem. Had to replace plugs and wires ( Tune up).

Mike

WB-
Did this happen right after you installed your new programmer? Could it be related?
I'm thinking about a programmer myself.

yup, but everyone says its got nothing to do with it........they say my throtle body is simply dirty

2003 White Lux, Alpine Nav/DVD, 3 Screens, Cold Air, Metal Dash/Mats/Steering Wheel, All SMA Chromes, Signal Mirror, Corsa Exhaust, JBA Headers, Diablo Programmer, Nology Plugs & Wires.

With all the mods on your H2, it will be interesting to see what the dealer says. I hope you have a good working relationship with them... Otherwise expect trouble.

Any chance the plug wires are getting too close to the headers? Did you change to a different heat range spark plug?

I'd program the computer back to stock - First to eliminate that as a problem, and second to keep the dealer from using that as an excuse.

Klaus

"God made some men big and some men small, but Sam Colt made them all equal."

TRUCK IS ALREADY PROGRAMMED BACK TO FACTORY SPECS AND PLUGS AND WIRES ARE HEAVY GAUGE QUALITY.........LETS SEE WHAT THEY SAY TOMORROW.

2003 White Lux, Alpine Nav/DVD, 3 Screens, Cold Air, Metal Dash/Mats/Steering Wheel, All SMA Chromes, Signal Mirror, Corsa Exhaust, JBA Headers, Diablo Programmer, Nology Plugs & Wires.

I will go with the O2 sensor.

Black Lingenfelter Lux

The engine revs up and down or just the gauge? When a engine revs up an down at idle it most likley is a vacume leak. BIG-C

White 03-H2-LUX

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I agree with Circuitguy. Check for vacuum leaks esp. with the cold air intake.

2003 H2 Hummer, Yellow,Polished Whipple Supercharged, Edelbrock ceramics, catback,18" Ambush w/mudders,lots of goodies!
Y2K Corvette Millennium Yellow Convert/Blk/Blk, B&B headers, B&B Tri-Flo's, H-Tech MAG,GMS MAF, RM Racing TwinFlow.
1994 Chev 454 Suburban, Blown, Doug Thorley
1970 Trans Am, balanced, blue printed, Hooker ceramics

www.4swimwear.com

I had a similar problem with my supercharged 99 Suburban.. We searched for 3 days and took to 2 shops to find a vaccum leak..Finally Took to friend at dealership ( which one day I will learn to go to 1st).. They changed plugs and wires and has never had a problem since.. My got so bad it would die at the stop lights.. Very embarrassing to have a custom tricked out vec. at the stop and then die!

Good luck .. I'm sure the dealer will be able to fix you up.

Mike

Thanks for all the conserns bothers.........it turned out to be my throttle body that was all carboned up.

White Beast is now stronger than ever.

2003 White Lux, Alpine Nav/DVD, 3 Screens, Cold Air, Metal Dash/Mats/Steering Wheel, All SMA Chromes, Signal Mirror, Corsa Exhaust, JBA Headers, Diablo Programmer, Nology Plugs & Wires.

Did they have any idea of how all the carbon built up in it?

2003 H2 Hummer, Yellow,Polished Whipple Supercharged, Edelbrock ceramics, catback,18" Ambush w/mudders,lots of goodies!
Y2K Corvette Millennium Yellow Convert/Blk/Blk, B&B headers, B&B Tri-Flo's, H-Tech MAG,GMS MAF, RM Racing TwinFlow.
1994 Chev 454 Suburban, Blown, Doug Thorley
1970 Trans Am, balanced, blue printed, Hooker ceramics

www.4swimwear.com

They said they've been having the same quick carbon build-up problem with all GM 6.0 engines, wether H2 or Denali.

2003 White Lux, Alpine Nav/DVD, 3 Screens, Cold Air, Metal Dash/Mats/Steering Wheel, All SMA Chromes, Signal Mirror, Corsa Exhaust, JBA Headers, Diablo Programmer, Nology Plugs & Wires.

I haven't heard of that one. Did they explain why it was happening? Is there anything that can be done to prevent it?

unfortunately no prevention.....they said all 6.0's have to get cleaned out almost every 15k.

2003 White Lux, Alpine Nav/DVD, 3 Screens, Cold Air, Metal Dash/Mats/Steering Wheel, All SMA Chromes, Signal Mirror, Corsa Exhaust, JBA Headers, Diablo Programmer, Nology Plugs & Wires.

is this something I should ask to have done... was it warranty job? I am due soon for oil change and am at around 15K.. unaslob

NO WARRANTY......IT WOULDN'T HURT FOR THEM TO TAKE A LOOK AT THE THROTTLE BODY.

2003 White Lux, Alpine Nav/DVD, 3 Screens, Cold Air, Metal Dash/Mats/Steering Wheel, All SMA Chromes, Signal Mirror, Corsa Exhaust, JBA Headers, Diablo Programmer, Nology Plugs & Wires.

Same here, The cleaned the throttle body and flushed the injectors. It would surge at Idle.

Black H2 Adventure Series + Luxury, AirForce One intake, Throttle Body Bypass, Gobi Rack w/2" Brackets & 4 PIAA 580 Lights, Xenarc HID, Alcoa Wheels, Goodyear 37x12.50x17 MT/R, Warn 9.5Ti Thermometric Winch, DiabloSport programmer,160 Degree T-Stat, 2-7" screens in headrests with DVD player and TV Tuner.

I just got mine back from the dealer yesterday. I also had a surging problem at idle and they cleaned my throttle body for about $35.00. I had 11,000 miles on the odometer. I hope this isn't something that needs to be done every 15,000 miles. I'd like to learn how to do it myself if that's the case.

By the way, I'm not sure it helped much as I noticed a little surging (that went away quickly) today.

JohnS