Notices
928 Forum 1978-1995
Sponsored by:
Sponsored by: 928 Specialists

89 S4 Stumbling / No Power ( Problem Solved )

Thread Tools
 
Search this Thread
 
Old 11-27-2011, 04:40 PM
  #16  
pjg
Racer
Thread Starter
 
pjg's Avatar
 
Join Date: Dec 2009
Location: Mass
Posts: 423
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by ROG100
Beru full factory wire set $335 at 928sRus.
Roger,

Add the Beru wires to my black Friday order if you still can.

Last edited by pjg; 11-27-2011 at 09:30 PM. Reason: typo
Old 11-28-2011, 08:16 PM
  #17  
pjg
Racer
Thread Starter
 
pjg's Avatar
 
Join Date: Dec 2009
Location: Mass
Posts: 423
Likes: 0
Received 1 Like on 1 Post
Default

Pulled all the injectors sending out for cleaning, maybe they can bring the dead one back to life.
Old 12-02-2011, 10:58 AM
  #18  
pjg
Racer
Thread Starter
 
pjg's Avatar
 
Join Date: Dec 2009
Location: Mass
Posts: 423
Likes: 0
Received 1 Like on 1 Post
Default

Just got the call from the injector cleaning tech, 1 was totally clogged, 2 very low output, the rest working but out of spec, He was able to bring them all back to life and in spec, should have them back soon to reinstall.
Old 12-02-2011, 11:07 AM
  #19  
jej3
Three Wheelin'
 
jej3's Avatar
 
Join Date: Feb 2004
Location: Jacksonville and sometimes St. Aug Beach, FL
Posts: 1,727
Received 342 Likes on 171 Posts
Default

You might want to do yourself a favor and pull/check/replace the Fuel Pump relay. My 1990 S4 developed some stumbling at SITM and that was the root cause.
Old 12-02-2011, 11:11 AM
  #20  
Mrmerlin
Team Owner
 
Mrmerlin's Avatar
 
Join Date: May 2004
Location: Philly PA
Posts: 28,523
Received 2,605 Likes on 1,468 Posts
Default

I sent off a set of injectors from a 86 the engine had a rough stumble when idling and warmed up.
Anyway the tech at Witchunter gives me a call and says so what do you want me to do with these injectors?
throw them out or send them back to you, they are all junk.
Turns out these were Accel injectors.
Though they looked new the PO had gone and bought lots of less expensive parts to fit to the 86 this made a lot of running issues appear.
After some searching on Ebay I got a set of Denso/Ford rebuilds from a 5.0 Mustang plugged them in and the engine ran smooth as glass.
I hope the injectors clear up your running faults
Old 12-02-2011, 11:26 AM
  #21  
pjg
Racer
Thread Starter
 
pjg's Avatar
 
Join Date: Dec 2009
Location: Mass
Posts: 423
Likes: 0
Received 1 Like on 1 Post
Default

These are the stock Bosch injectors with 60K on them, so they should be good as long as they are kept clean, will change out the fuel filter before I fire it back up.
Old 12-02-2011, 08:54 PM
  #22  
dr bob
Chronic Tool Dropper
Lifetime Rennlist
Member
 
dr bob's Avatar
 
Join Date: Oct 2001
Location: Bend, Oregon
Posts: 20,506
Received 549 Likes on 412 Posts
Default

My car had similar symptoms until I plugged in the rebuilt LH box. Try yours in another car and see if the symptoms move with the controller. If the refurb'd injectors don't do the trick, this might be your next step.
Old 12-02-2011, 10:03 PM
  #23  
pjg
Racer
Thread Starter
 
pjg's Avatar
 
Join Date: Dec 2009
Location: Mass
Posts: 423
Likes: 0
Received 1 Like on 1 Post
Default

Some pics of the old spark plugs, 3, 4, and 8 look brand new, not much if any combustion going on, make sense little or no fuel from clogged injectors.
Attached Images   
Old 12-02-2011, 10:07 PM
  #24  
123
Racer
 
123's Avatar
 
Join Date: Nov 2006
Posts: 295
Likes: 0
Received 0 Likes on 0 Posts
Default

Any particular reason why plugs 1 and 7 are a different kind than the other ones?
Old 12-02-2011, 10:13 PM
  #25  
pjg
Racer
Thread Starter
 
pjg's Avatar
 
Join Date: Dec 2009
Location: Mass
Posts: 423
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by 123
Any particular reason why plugs 1 and 7 are a different kind than the other ones?
Just recently purchased the car, no idea why they are different.
Old 12-02-2011, 11:23 PM
  #26  
Lizard928
Nordschleife Master
 
Lizard928's Avatar
 
Join Date: Apr 2003
Location: Abbotsford B.C.
Posts: 9,600
Received 34 Likes on 25 Posts
Default

There is your problem! replace plugs with WR7DC+ bosch coppers!
Old 12-02-2011, 11:35 PM
  #27  
Mrmerlin
Team Owner
 
Mrmerlin's Avatar
 
Join Date: May 2004
Location: Philly PA
Posts: 28,523
Received 2,605 Likes on 1,468 Posts
Default

^^^^^what Colin said,
use the Bosch Silver Tips Plus
PN 7900 from autozone
Old 12-02-2011, 11:40 PM
  #28  
pjg
Racer
Thread Starter
 
pjg's Avatar
 
Join Date: Dec 2009
Location: Mass
Posts: 423
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by Lizard931
There is your problem! replace plugs with WR7DC+ bosch coppers!
Thats one of the first things I did, replace the plugs with Bosch copper 7900,
it was still running terrible, so I started to listen to the injectors
and noticed at least 1 was not clicking so I pulled them all and sent them
out to be cleaned, should have them back on Saturday to test out.
Old 12-05-2011, 06:40 PM
  #29  
pjg
Racer
Thread Starter
 
pjg's Avatar
 
Join Date: Dec 2009
Location: Mass
Posts: 423
Likes: 0
Received 1 Like on 1 Post
Default

Just got the injectors back today, here are the test results. It was worse than I thought, should see major improvement once I get them back in.
Attached Images  
Old 12-05-2011, 06:48 PM
  #30  
Dave928S
Rennlist Member
 
Dave928S's Avatar
 
Join Date: Jun 2008
Location: Tasmania, Australia
Posts: 4,681
Received 64 Likes on 42 Posts
Default

Wow .. they were bad. Your car should be a rocketship when you get them back in ... .


Quick Reply: 89 S4 Stumbling / No Power ( Problem Solved )



All times are GMT -3. The time now is 03:31 AM.