View Single Post
  #2  
Old 01-02-2008, 03:37 PM
MVR 155's Avatar
MVR 155 MVR 155 is offline
Hummer Professional
 
Join Date: Aug 2007
Location: Bartlett, Illinois
Posts: 486
MVR 155 is on a distinguished road
Default Re: ENGINE BREAKING UP AND MISSING BETWEEN 5000-6000 RPM

I know you mentioned new plugs..... was that when the SC was installed a few months ago??? The first thing I can think of is to check the plugs, even though they are a few months old. You may be getting some detonation and have possibly damaged a spark plug(s). If you find that you have detonation I would suggest hooking up with a reputable tuner right away and have him add fuel or pull timing on your program. Right along with the first theory is that you may be starving for fuel up top, I would hook up a pressure gauge and check this..... if your starving for fuel you are definately detonating which can or has already taken its toll in terms of engine damage.

Good Luck in getting to the root of the problem..... keep us posted on what happens.
__________________
2008 H2 SUV Luxury: Solar Flare ext/Black int

SOLD 2006 H2 SUV Luxury: Pewter ext/Black int.

2002 Corvette Z06 Blue/Ebony (light mods)
1/4 mile: 11.661@118.86

2013 Audi S4

2002 Yamaha YZF R1 Blue/White
1/4 mile: 10.51@136

2006 Sea-Doo RXP (70.6mph GPS)
2005 Sea-Doo RXT
Reply With Quote