Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

Engine stutter at high r's and at wot

Thread Tools
 
Search this Thread
 
Old 05-19-2010, 08:05 AM
  #1  
TECH Apprentice
Thread Starter
iTrader: (9)
 
velox65's Avatar
 
Join Date: Apr 2008
Location: Clinton, Ok
Posts: 367
Likes: 0
Received 0 Likes on 0 Posts

Default Engine stutter at high r's and at wot

Got a weird problem, car runs great with general driving, but when I lay into her she runs good for a bit then baam it seems like a severe misfire (bad coil or fuel?)but no codes are thrown, only codes is the tps. It only stutters at the high end and I can let off and do it again and sometimes it won't miss a beat. I've done about everything I can think of and I'm stumped
Old 05-19-2010, 08:39 AM
  #2  
TECH Fanatic
 
DaveX's Avatar
 
Join Date: Feb 2004
Location: Lexington, KY
Posts: 1,259
Likes: 0
Received 0 Likes on 0 Posts

Default

Maybe it's tagging the rev limiter? If it's an A4 it will typically shift slightly after the set point as it takes the trans a few milliseconds to actually shift. Mine does this once in a while, particularly if it's spinning the tires when it shifts because the rpm's are building faster than they would be if it wasn't spinning.
Old 05-19-2010, 08:50 AM
  #3  
TECH Apprentice
Thread Starter
iTrader: (9)
 
velox65's Avatar
 
Join Date: Apr 2008
Location: Clinton, Ok
Posts: 367
Likes: 0
Received 0 Likes on 0 Posts

Default

Don't think so, it does it around 5500 my limiter is 6700 and it's a little harsher than bumping the limiter
Old 05-19-2010, 12:59 PM
  #4  
Teching In
 
PewterLS-1poweredSS's Avatar
 
Join Date: May 2010
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
Default

Could be your valve springs. Mine had a stutter that started at 5000rpm and lasted till about 5500 then pulled fine until the rev limiter. After I changed the springs out it was gone. Also the motor will make a funny sound when the stutter is happening.
Old 05-19-2010, 04:01 PM
  #5  
TECH Apprentice
Thread Starter
iTrader: (9)
 
velox65's Avatar
 
Join Date: Apr 2008
Location: Clinton, Ok
Posts: 367
Likes: 0
Received 0 Likes on 0 Posts

Default

you have weak springs and switch to the same type or upgrade?
Old 05-20-2010, 03:07 PM
  #6  
TECH Apprentice
Thread Starter
iTrader: (9)
 
velox65's Avatar
 
Join Date: Apr 2008
Location: Clinton, Ok
Posts: 367
Likes: 0
Received 0 Likes on 0 Posts

Default

Bump..
Old 05-21-2010, 10:36 AM
  #7  
Teching In
 
PewterLS-1poweredSS's Avatar
 
Join Date: May 2010
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
Default

I upgraded to yellow ls6 springs. Next time I would definatly go with something stronger, the problem is starting to come back.
Old 05-22-2010, 04:29 AM
  #8  
TECH Junkie
iTrader: (4)
 
Soul TKR's Avatar
 
Join Date: Jun 2004
Location: San Diego, CA
Posts: 3,543
Likes: 0
Received 1 Like on 1 Post

Default

Sounds like your getting valve float... what's the mileage on those springs? I agree... sounds like upgrade time.
Old 05-22-2010, 10:05 AM
  #9  
TECH Apprentice
Thread Starter
iTrader: (9)
 
velox65's Avatar
 
Join Date: Apr 2008
Location: Clinton, Ok
Posts: 367
Likes: 0
Received 0 Likes on 0 Posts

Default

Yellow ls6 springs I was told low mileage, it also seems to do it at lower r's like when it's being lugged but rarely



Quick Reply: Engine stutter at high r's and at wot



All times are GMT -5. The time now is 12:04 PM.