Sab

Well first the alternator gave in and left me stranded with a dead battery and now that I got it fixed, the car died right before I came home from a seemingly perfect 30 mile test drive.
After we finally reinstalled the alternator everything seemed perfect. Voltage checked out at 13.3 volts while running and the car ran perfect. Once I came close to home after the long drive I felt very confident in the car and took off fairly fast merging into traffic. After shifting from first to second the car died. Just as if I ran out of fuel. I pulled of the road and tried to restart. No odd noises, but would not start. It seemed to fire severall times, but no start.
Cameron came down to help and possibly give me a tow back home.
I wnet to listen for the fuel pump in the back while I he turned the ignition on and nothing, just silence.
I swapped the fuel pump relay, no change.

We tried to install the tow hook, bot it had some sort of plug in it that would not come out. Is there supposed to be a plug screwed in...?

So I just left the dead beast on the side of the road. Very frustrating way to end a day.

I had my fuel pump and filter replaced less then six month ago. When I was on the track last month it seemed to run out of fuel at a quarter tank in sharp left turns. Now the car died at under a quarter of fuel in the tank upon fast acceleration. Could the fuel pump have burned out?

Would the fuel pump come on if the LH brain failed?

Rod Underwood

The plug has a screw-in filler to keep dirt out of the threads. It will come out with an allen wrench. I don't know if the tool kit has one or not, but it's easy to remove, at least mine was.

Good luck.
Rod

Chris

Well you can bypass the fuel pump relay (as Jim says relay, relay, relay) with a piece of wire to see if it is the relay and/or the brain. I think the fuel pump relay is the same as some of the others in the fuse box too.

People at Porsche were pretty stupid putting an aluminium plug in a steel thread for the front towhook. GTS had a rubber bung ....

I hope you get back on the road with a minumum of fuss.

Chris

Jim R.

Try jumping the fuel pump relay to see if it runs. Also, check and clean or replace any related fuses. We solved a no cooling fan problem on a local shark with just a clean new fuse to replace the still intact but corroded old one on an '88.

When you replaced the old fuel pump, did you change the internal pump? (if you have one) A bad internal pump can kill a new or old external pump. I change out both of mine after the SC install just to be safe.

Did you hear the injectors clicking away with the ignition on and the car not running?

Good luck,

Jim

Sab

I almost broke my alan key using the tow hook as leverage trying to brake that plug loose. It felt like it was welded in there. That is the dummest thing I have seen so far on the 928. A real hazard if towing is needed...

Sab

No injectors clicking, good point Jim. I remeber that sound when my LH failed on my '87 S4 a couple of years ago.

JP Rodkey

Sister Cleo says, ".....fuel pump....."

The description of problems at the track don't sound relay related, but pump related.

Bill51sdr

Check the EZF relay as well (just swap it with the horn relay). Sounds similar to symptoms I had with another 928 I owned & a new EZF relay did the trick.

Sab

Hi JP,
the '87 S4 is still running with your engine...
regards,
Sab.

SharkSkin

Is it still alongside the road? Are you serious? Dang, call all your friends till you find someone with AAA and go get it you never know what some knucklehead might go and do....

Louie928

Check the in tank pump. The hose between the pump and the outlet comes apart and a piece will get into your outside the tank pump and cause it to jam. Sometimes you can reverse the wires on the outside pump so it will run backward and spit out the debris. This same scenario has happened to me ('90 GT) and several others too. Probably safe to say that it will happen to everyone with an original in tank fuel pump. Then again 10 or 15 years later.

jpitman2

The early towing hook plug was alloy, and would corrode in place. The current replacement plug is black plastic thing that looks like a baby's dummy (comforter). I suggest it gets checked and fixed if it cant be easily removed - the allen key provided to unscrew the plug is brittle and will break readily, leaving a very undesirable situation. I drilled a plug out for somebody a year or two ago. The thread in there is (hold on to your standards now) 20mm OD x 8 tpi Acme....I had a tap made up at work for this.The earlier cars with the smaller thread (15mm x 8 tpi) is a std Acme thread spec, but at 20mm, 8 tpi is unavailable AFAIK. A month after we fixed the aforesaid car's threads, it had a battery failure and needed to be towed.
jp 83 Euro S AT 49k

Sab

OK, I had more shark repair then I can handle for a week. Once I saw that the car was still in one pieceon the side of the road this morning I called a tow truck and send it to the shop. Comes to a point where my time is better spend working and paying a pro to fix the "old bag of bolts".

My tech said it's te fuel pump. Once I reminded him that I had him replace the pump after the supercharger install, he stated that he then has to check all other components. I just checked on the car and heard that the in tank pump is busted as well and that must have caused the new pump to brake. I might get the car back shortly.

How do these pumps relate and will the intake pump cause trouble to the external pump once it fails?
Also would the failed in tank pump have caused my car to run out of fuel in hard corners?

Daniel Dudley

Yes and Yes. Hope that does it for you.

Louie928

As Daniel D. said "yes & yes". I think I explained what happens with the in tank pump in an earlier post. I can post a pic of a hose failed in-tank pump if you want. There is a short ~1" long hose that comes apart, and breaks. Then you have no filter for the fuel going to the outside tank pump.