Notices
Pontiac GTO 2004-2006 The Modern Goat

Valve float 2006 GTO

 
Old 07-19-2018, 08:12 AM
  #1  
Teching In
Thread Starter
 
Join Date: Aug 2017
Location: North Central Florida
Posts: 20
Default Valve float 2006 GTO

I own a 2006 GTO LS2 with 104,000 miles. The car is near mint condition and runs well. I was told I have valve float from around 4,000 RPM to 6,000 RPM. Yes I can feel it nose over. Is this a common problem with high mileage LS2 engines ? If so how much to change out stock springs ?
Rebel GTO is offline  
Old 07-20-2018, 01:29 AM
  #2  
TECH Junkie
iTrader: (1)
 
Join Date: Sep 2004
Location: Stockbridge GA
Posts: 3,053
Default

Originally Posted by Rebel GTO View Post
I own a 2006 GTO LS2 with 104,000 miles. The car is near mint condition and runs well. I was told I have valve float from around 4,000 RPM to 6,000 RPM. Yes I can feel it nose over. Is this a common problem with high mileage LS2 engines ? If so how much to change out stock springs ?
The mileage would be less of an issue than the years of spring compression. If a car of that age and mileage is in near mint condition, I would guess it has spent a lot of time sitting with some of the springs compressed. If you indeed have valve float, it is a really easy condition to fix, but it will cost a little time and effort to replace all the springs. With all of that being said, I doubt you have valve float. These engines are engineered to last far longer in both time and mileage than what you have described, and the idea that you have valve float at 4000 rpm is stretching the bounds of believability. Whoever told you that is probably a ******* idiot. Post more details of your symptoms.
gametech is offline  
Old 07-20-2018, 07:32 AM
  #3  
Launching!
 
bobfig's Avatar
 
Join Date: Oct 2010
Location: Houston, TX
Posts: 228
Default

im probably going to lean more towards not enough fuel. is there a filter or something on the car?
bobfig is offline  
Old 07-20-2018, 10:08 AM
  #4  
TECH Fanatic
 
MuhThugga's Avatar
 
Join Date: Jul 2007
Location: Wilmington, De
Posts: 1,280
Default

You can always pull a few springs and have their pressures tested. That will tell you if the springs are worn and warrant replacement.
MuhThugga is offline  
Old 07-27-2018, 10:36 PM
  #5  
Launching!
 
Join Date: Jul 2015
Location: Chicago
Posts: 233
Default

Originally Posted by bobfig View Post
im probably going to lean more towards not enough fuel. is there a filter or something on the car?
Try this first. Put a mechanical pressure gauge on the fuel rail shcrader valve. It should read 60 lbs at idle and drop to no less 56-58 lbs under WOT. If it drops to say 50 or 40, the motor will roll over above 4000 rpms. There is a fuel filter also. It is in the tank and inside the fuel canister. It is mesh and designed to screen out larger particles. If the pressure drops off, its probably the fuel pump.
rednari2 is offline  
Old 07-28-2018, 07:21 AM
  #6  
Teching In
Thread Starter
 
Join Date: Aug 2017
Location: North Central Florida
Posts: 20
Default

Thanks for all your responses. I recently spoke with a very good LS tech. He said he has been having problems when his customers use certain fuels like Shell which I have been using. He suggested that I first burn through that fuel and use either BP or Sunoco for a few tanks of fuel. If the problem still persists he will look at the car for me. Again thanks guys.
Rebel GTO is offline  
Old 07-29-2018, 08:30 AM
  #7  
10 Second Club
 
dw456post's Avatar
 
Join Date: Nov 2005
Posts: 515
Default

You should find a new LS tech.
dw456post is offline  
Old 07-29-2018, 07:58 PM
  #8  
Launching!
 
Join Date: Jul 2015
Location: Chicago
Posts: 233
Default

Originally Posted by Rebel GTO View Post
Thanks for all your responses. I recently spoke with a very good LS tech. He said he has been having problems when his customers use certain fuels like Shell which I have been using. He suggested that I first burn through that fuel and use either BP or Sunoco for a few tanks of fuel. If the problem still persists he will look at the car for me. Again thanks guys.
Yeah, this is lame.
rednari2 is offline  
Old 08-18-2018, 10:48 PM
  #9  
TECH Junkie
iTrader: (1)
 
Join Date: Sep 2004
Location: Stockbridge GA
Posts: 3,053
Default

Originally Posted by dw456post View Post
You should find a new LS tech.
Understatement of the year award has just been taken.
gametech is offline  
 


Thread Tools
Search this Thread
Quick Reply: Valve float 2006 GTO


About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: