Brent 89-GT

Thanks for all who joined to help me fix the shark when it died at my buddies house a few weeks ago. I finally have it home and am now prepared to fix the bugger. Turns out the beer and beef had more of an allure than fixing the car at the time

I am pretty sure it is the LH. I switched relays around to try and test for bad ones on the LH, EZK and the fuel pump. Nothing seemed to make any difference. My goal at this point, before I yank the LH for a rebuild, is to eliminate the possibility of it being "just" a bad fuel pump. Does anybody have a description of what to jumper to keep the fuel pump energized regardless of what the LH is telling it to do?

Bill Ball

How did you get the car home? Jump 30 to 87 on the fuel pump relay socket (XX). You need to find a volunteer in your area with an 87-91 S4 or GT into which you can swap your LH. If that car fails to run, you have your answer.

Brent 89-GT

Bill, It came home on the trailer. I had to bum a ride home from a friend who lives closer, then I had to go out of town for the week. The 928 was going to gets its fall run but I had to drive the truck instead. Once home from that trip I made a marathon day of it with truck and trailer, 640 miles through the mountains in 11 hrs.

There is a local guy with both an '85 and an '87 that is in the Porsche club. I have his contact info in a club registry. We also did some impromptu canyon carving when we met up in our 928s one day on the road. The way he drives, he must be a good guy

Thanks for the help.

cfc928gt

Brent, I just had to replace both fuel pumps on my '89 GT, which died while driving. I'd pull the fuel pump cover off the back and put power to your external pump and you'll hear if it runs. If you jumper terminals you still won't know if the pump is working or not. I just ran a wire from my battery and touched the positive terminal on the fuel pump. You could hear it try to turn but it was toast, so was the internal one. Easy fix, just have to throw $ at it. Internal pump removal needs a 35mm socket.

Lorenfb

You can easily test the fuel pump relay (& its power) & the pump by grounding pin 20
on the LH control unit connector with the LH unit disconnected. You can, with some
test lights, activate the fuel pump relay by touching pin 20.

Make sure the LH unit has the proper power & grounds by using a test light:

+12 volts - pins 4, 9, 35
ground - pins 5, 17