Will 88 Fuel Pump Work on 81?
08-17-2008 | 04:08 PM
#1
Thread Starter
On the Bandwagon
Rennlist Member
Rennlist Member
Joined: Feb 2004
Posts: 2,408
Likes: 2
From: Texas
Will 88 Fuel Pump Work on 81?
Been messing with the 81 today trying to diagnose no-start issue.
I replaced the green wire with a new one as it was pretty corroded - I haven't checked for spark yet but moved on to the fuel system
When fuel pump relay is jumped, I get power to the pump, but pump doesn't run.
I think I have a spare pump lying around somewhere for my 88. Anyone know if that will work before I go looking for it (I guess from a hook-up and pressure standpoint)?
Thanks
I replaced the green wire with a new one as it was pretty corroded - I haven't checked for spark yet but moved on to the fuel system
When fuel pump relay is jumped, I get power to the pump, but pump doesn't run.
I think I have a spare pump lying around somewhere for my 88. Anyone know if that will work before I go looking for it (I guess from a hook-up and pressure standpoint)?
Thanks
08-17-2008 | 04:38 PM
#3
Basic Sponsor
Rennlist
Site Sponsor
Rennlist
Site Sponsor
Joined: Jan 2003
Posts: 16,839
Likes: 897
From: Double Oak, TX
In theory different pumps - in practice if you can hook it up maybe.
__________________
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
08-17-2008 | 04:55 PM
#5
Thread Starter
On the Bandwagon
Rennlist Member
Rennlist Member
Joined: Feb 2004
Posts: 2,408
Likes: 2
From: Texas
Thanks!
Hacker - I think I was going to look for a flywheel for you - I looked yesterday but couldn't see it - it may have been attached to the engine when I sold it - I'll keep looking
Hacker - I think I was going to look for a flywheel for you - I looked yesterday but couldn't see it - it may have been attached to the engine when I sold it - I'll keep looking
08-17-2008 | 10:28 PM
#6
Administrator
Joined: Aug 2001
Posts: 1,631
Likes: 2,249
From: Up Nort
Cool, thanks Rob. I have one for the 81, but the 79 is just around the corner (same project).
08-18-2008 | 12:56 AM
#7
Rennlist Member
Joined: Dec 2002
Posts: 5,283
Likes: 49
From: Australia
My 83 K-jet had an S4 pump in it when I got it, no issues with it. IMHO if its an efi pump and you can fit it into the connections properly, it out to work. L and LH use pressures of ~45psi max, where K-jet needs 65-75psi to run.
jp 83 Euro S AT 51k
jp 83 Euro S AT 51k
