1972 fuel pump options?

teachkenpo · 05-19-2013, 06:08 PM

I have a 1972t with mfi. The fuel pump (located under the torsion tube) is shot. I have been searching the forums to get advice on non-OEM options. Does anyone have a simple answer? Thank you in advance.
John

gptom · 05-20-2013, 09:10 AM

I sent my fuel pump to Fuel Injection Corporation 925.371.6551

Fuel Injection Corporation

They did a great job

Tom

dtw · 05-20-2013, 01:40 PM

installing Zims replacement MFI fuel pump

Britt never updated the thread, but the car and fuel pump are running great.

teachkenpo · 05-20-2013, 05:50 PM

When I removed my non working fuel pump from the 72T MFI and hooked it up to a battery, all it did was hum a bit. On gptom's suggestion I called Fuel Injection Corporation. They offered to rebuild mine for $325. That was better than buying a new one. Then dtw pointed me to the post about the Zim option. While considering what to do, I took the following steps:

1. Soaked it for a few hours in my parts washer.

2. Sprayed Sea Foam penetrating oil in the pump while alternating connecting it to a battery to run it in one direction then the other.

3. Smacked it with a hammer. (it actually started to run when I did this)

4. Continued to circulate Sea Foam Oil through the pump while alternating the pump direction for short bursts.

Remarkably, it is now working. When it finally does die for good, I will use one of the other excellent suggestions.
Thanks Guys.

John

Hezath · Hezath's Garage

Would it be a good thing or a bad thing to run the pump in reverse while it is assembled in a CIS car?

teachkenpo · 05:53 AM

I don't have a comment on that. I have not worked on a CIS system, and don't know how the pump differs. If it is a non-working pump, you have little to loose. However, why not try everything I mentioned without reversing the polarity and direction of the pump first. I don't think the reverse direction was the key to my success. I believe it was the combination of penetrating oil and a hammer.
Best of luck.
John

kugelfischer · 05-21-2013, 06:51 AM

I believe that the general consensus is that the best pump for an MFI system is an original OEM unit. The other non-original options end up making concessions in one way or another.
My recommendation would be to either pick up a rebuilt pump, or to have yours rebuilt.
FWIW the current "OEM" offering from Porsche Classic has a terrible reputation and is apparently made in China (in addition to being hideously expensive).

Hezath · Hezath's Garage

Quote:

Originally Posted by teachkenpo

I don't have a comment on that. I have not worked on a CIS system, and don't know how the pump differs. If it is a non-working pump, you have little to loose. However, why not try everything I mentioned without reversing the polarity and direction of the pump first...

All good. It is a working pump but I was having some problems with the electrics of it and thought maybe it was a bit gunked up and drawing excessive current? Just curious as to whether you thought it was worth alternating the polarity a few times just to free up some crud, but I don't think I'll rush to do that unless someone specifically recommends it.