Notices
924/931/944/951/968 Forum Porsche 924, 924S, 931, 944, 944S, 944S2, 951, and 968 discussion, how-to guides, and technical help. (1976-1995)
Sponsored by:
Sponsored by:

hesitation/rough running after right turns???

Thread Tools
 
Search this Thread
 
Old 11-10-2017, 03:31 PM
  #1  
Todd951968
Burning Brakes
Thread Starter
 
Todd951968's Avatar
 
Join Date: Nov 2004
Location: Pennsylvania
Posts: 793
Likes: 0
Received 1 Like on 1 Post
Default hesitation/rough running after right turns???

Can anyone help with ideas on what to look for here? I've been trying to sort out an issue with the 924S . It runs great for the most part but cuts out/hesitates/stumbles a lot when making right turns!!!

I attached fuel pressure gauge to rail with a hose long enough to see while driving and it maintains fuel good pressure at all times, even while stumbling. So, I don't think its a fuel thing. There is a SLIGHT delay in throttle response (maybe a slight hesitation) on initial throttle application and it also doesn't seem to rev up to redline. It doesn't really rev above 5500 rpm.

Is there some sort of electrical connection that could be getting broken on right turns? If so, what?

It seems to run well going in a straight line and on left turns. But, this car is neither a dragster nor NASCAR so I need it to make right turns.
Old 11-10-2017, 05:49 PM
  #2  
ddombrowski
Instructor
 
ddombrowski's Avatar
 
Join Date: Mar 2014
Posts: 237
Likes: 0
Received 2 Likes on 2 Posts
Default

No advice for you other than I am going through the same thing, only on left turns.

I suspect the wiring harness, either the connections to the speed/ref sensors or the injector harness.
Old 11-10-2017, 06:09 PM
  #3  
StoogeMoe
Rennlist Member
 
StoogeMoe's Avatar
 
Join Date: May 2004
Location: Poconos PA
Posts: 2,755
Received 108 Likes on 80 Posts
Default

I had that happen to me, only on right turns! The solution was to unplug and plug back in the AFM. Not saying it will work for you, but I would remove all connectors and clean with something like Deoxit.
Old 11-13-2017, 10:55 AM
  #4  
Todd951968
Burning Brakes
Thread Starter
 
Todd951968's Avatar
 
Join Date: Nov 2004
Location: Pennsylvania
Posts: 793
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by StoogeMoe
I had that happen to me, only on right turns! The solution was to unplug and plug back in the AFM. Not saying it will work for you, but I would remove all connectors and clean with something like Deoxit.
Thanks, it can't hurt to try!
Old 11-13-2017, 03:17 PM
  #5  
Van
Rennlist Member
 
Van's Avatar
 
Join Date: Oct 2002
Location: Hyde Park, NY
Posts: 12,007
Received 88 Likes on 58 Posts
Default

Sounds electrical - try checking the spark plug wires, ARM wires and TPS wires.
Old 11-14-2017, 12:46 PM
  #6  
Scott at Team Harco
Just a car guy
Rennlist Member

 
Scott at Team Harco's Avatar
 
Join Date: Jan 2002
Location: South Lyon, Michigan, Ewe Ess Eh
Posts: 9,927
Received 835 Likes on 524 Posts
Default

Originally Posted by Van
Sounds electrical - try checking the spark plug wires, ARM wires and TPS wires.
Yes - either that, or take up circle track racing...



Quick Reply: hesitation/rough running after right turns???



All times are GMT -3. The time now is 05:03 PM.