Notices
928 Forum
Sponsored by:
Sponsored by: 928 Specialists

flat spot at 3000rpm

 
Old 05-20-2011, 02:31 PM
  #1  
vanster
Addict
Rennlist Member
Thread Starter
 
vanster's Avatar
 
Join Date: Sep 2010
Location: Oakland CA
Posts: 1,892
Default flat spot at 3000rpm

After the embarrassing flat washer in the wrong spot on my Bilsteins, incident .... car back on the ground and on the road to get the suspension to settle down, suddenly I have a flat spot around 3000 rpm over 3500 or so it clears out. Feels like a it loads up or the rev limiter ( don't think it has one) A bit rough at idle
at times as well. I only worked on the suspension and did a lot more cleaning on the underside but why now? I ran like a clock
before.
Any thoughts...I am going to do the "Italian tune up" which is drive it like hell for 25 miles...maybe it will clear out.

vanster
"80 5sp
vanster is offline  
Old 05-20-2011, 02:44 PM
  #2  
Landseer
Addict
Rennlist Member
 
Landseer's Avatar
 
Join Date: Sep 2007
Location: Frederick, Maryland
Posts: 11,262
Default

O2 sensor issue gave my 84 USA 5 speed a flat spot.

When I shifted the exhaust to the 84 USA auto, the flat spot transfered with it.
Landseer is offline  
Old 05-20-2011, 04:56 PM
  #3  
vanster
Addict
Rennlist Member
Thread Starter
 
vanster's Avatar
 
Join Date: Sep 2010
Location: Oakland CA
Posts: 1,892
Default flatspot

Ah!
I just noticed a few drops of fuel hanging around the bottom of my tank...outside of the tank and of course it's full.
Is it possible to have a fuel pressure problem as well?

vanster
vanster is offline  
Old 05-20-2011, 04:58 PM
  #4  
robot808
Addict
Rennlist Member
 
robot808's Avatar
 
Join Date: Dec 2006
Location: Elmhurst, IL
Posts: 2,483
Default

vanster, I believe the pressure is going to come on after the fuel pump, so I don't see how a leak at the tank would effect the pressure. Of course, you should still fix it.

Last edited by robot808; 05-20-2011 at 11:53 PM.
robot808 is offline  
Old 05-20-2011, 08:12 PM
  #5  
vanster
Addict
Rennlist Member
Thread Starter
 
vanster's Avatar
 
Join Date: Sep 2010
Location: Oakland CA
Posts: 1,892
Default

Bob
You are absolutely correct, thank you!
After closer inspection and this is the route of the problem
It was on my list of things to do. It just made it to the top.

Cheers
van
vanster is offline  

Thread Tools
Search this Thread

Contact Us - About Us - 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: