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:

Fuel Pump Failure or... ?

Thread Tools
 
Search this Thread
 
Old 10-19-2004, 02:13 PM
  #1  
mrmunky
Pro
Thread Starter
 
mrmunky's Avatar
 
Join Date: May 2002
Location: Chicago-ish
Posts: 739
Likes: 0
Received 0 Likes on 0 Posts
Default Fuel Pump Failure or... ?

Hi Everyone,
My car was leaking coolant like a sieve from the water pump, so i decided hey time for a replacement. As i was running it for the last time, the idle was loping very badly and getting worse and worse. Eventually, it died. I let it be dead and replaced the waterpump. Now that it's back together, it will start for 2-4 seconds, like it really wants to, and then it dies. It has fuel, and the AFM is all plugged in. I've checked the intake system over and over.. I replaced the fuel filter because i don't think that had ever been done, but that wasn't the problem. I'm going home this weekend (4 hour trip) and I want to get the po'sh running by the time I leave. Suggestions?
Thanks y'all
Ian
Old 10-19-2004, 04:21 PM
  #2  
mrmunky
Pro
Thread Starter
 
mrmunky's Avatar
 
Join Date: May 2002
Location: Chicago-ish
Posts: 739
Likes: 0
Received 0 Likes on 0 Posts
Default

come on now, i need some help.. bump.
Old 10-19-2004, 04:45 PM
  #3  
theedge
Addict
Rennlist Member
 
theedge's Avatar
 
Join Date: Aug 2003
Location: Canada, Eh?
Posts: 14,242
Likes: 0
Received 3 Likes on 3 Posts
Default

Tried a new DME relay? Old gas in the tank?
Old 10-19-2004, 07:15 PM
  #4  
Mike S
Three Wheelin'
 
Mike S's Avatar
 
Join Date: Jun 2001
Location: San Jose, CA
Posts: 1,598
Likes: 0
Received 0 Likes on 0 Posts
Default

Long list of possibilities here.

1) Fuel pressure regulator
2) DME relay (wiggle and tap it...maybe that'll work)
3) Fuel pressure damper

Check the fuel pump by unplugging the fuel lines and turning the ignition on. You should see fuel coming out of there. Be real careful. Fuel is dangerous. If no fuel comes out...its dead.
Old 10-19-2004, 07:47 PM
  #5  
tod84944
Drifting
 
tod84944's Avatar
 
Join Date: Jul 2002
Location: goodlettsville,tn
Posts: 2,476
Likes: 0
Received 0 Likes on 0 Posts
Default

This sounds just like the problem I had with the 84 that I put together for my nephew. I could keep it running if I kept it up around 2.5k on the tach. It also would get really bad if the cooling fans kicked on. Replaced the dme temp sensor, dme, and dme relay. No change. Found that the ground was loose on the block coming from the battery. Cleaned and tighten it. Also the ground for the dme was really nasty looking. Cleaned and tighten, car runs great !!!!!
Old 10-19-2004, 08:15 PM
  #6  
Zero10
Race Car
 
Zero10's Avatar
 
Join Date: Nov 2003
Location: Calgary, AB
Posts: 4,593
Likes: 0
Received 2 Likes on 2 Posts
Default

Sounds like a FPR. Check the vacuum line leading to it, should have 18" Hg at idle.
If it does, check out the fuel pressure.



Quick Reply: Fuel Pump Failure or... ?



All times are GMT -3. The time now is 09:56 AM.