I've been working on restoring the D-Jetronic EFI on my 73 2.0L. I've installed SS fuel lines, relocated the fuel pump to the front trunk, reinstalled the manifold and throttle body, installed the injectors, and plumbed the system.

My first test was going to be pressurizing the system to check the pump, regulator, and all the hose connections. I connected across the fuel pump relay socket on the relay board and all I got was a "clicking" noise from the fuel pump. Worse, I find that the fuel pump is leaking fuel from around the electrical connector.

Looks like I need a new pump. Anyone have any advice? Can I use a 75-76 pump in my '73? They appear to be significantly less expensive. What's the difference? Also, does anyone have any experience with the rebuilt pumps available from Automobile Atlanta? Would you go for a rebuilt pump or find a used pump off a parts car?

(This was in response to someone asking how I plumbed the "Y" fitting and suggesting that the later pumps were preferred. They seem to have deleted their post. I'll quote next time.)

The "Y" fitting is under the tank with one leg connected to the return line from the engine, one leg connected to the return line from the pump, and one leg connected to the narrow pipe on the tank. All connections are with 7mm fuel hose (the German cloth-covered kind) and hose clamps at both ends.

Do you know the difference between the 70-74 pumps and the 75-76 pumps?

The later style pump has only 2 ports and they are different sizes. You can use the later style pump if you get the same year fuel filter and do away with the Y fitting. (I think that's right.) I have a late pump and filter on my 72 and it all works.

also - the O-ring that seals the electrical portion is a common failure item (age, heat...). the pump can be *carefully* opened for O-ring replacement. once it's apart you may find that a careful cleaning of the pump components with carb cleaner may restore operation. good original D-Jet pumps are nto scarce but they are expensive, and depending on how much time you have for fiddling, you may be able to rejuvenate yours.

or not; there's always the risk you'll invest a bunch of time and it'll still be dead.
your call...

Yeah,

I replaced the pump with a newer one with 0 probs (for now).

I heard you can use a domestic version as long as you get the correct volume/pressure (someone used one from a jeep!)

T

Use a later pump. Ditch the "Y", get the later filter and the piece of hose that goes from the filter to the pump. The Cap'n

How have you folks mounted the new pump? Its a smaller diameter than the old pump (51mm vs 58mm). I'm inclined to fabricate a rubber spacer to fit around the new pump and install it in the old pump's bracket. What have others done?

QUOTE (billd @ Sep 13 2005, 08:52 PM)

How have you folks mounted the new pump? Its a smaller diameter than the old pump (51mm vs 58mm). I'm inclined to fabricate a rubber spacer to fit around the new pump and install it in the old pump's bracket. What have others done?

That'll work fine, and make the installation quieter as a bonus. The Cap'n

I had some aluminium (sp?) from some flooring that i made/rolled a custom bracket.

It is a little loud, so maybe the rubber bushing thing would be a good idea.

T

QUOTE

I had some aluminium (sp?) from some flooring that i made/rolled a custom bracket. It is a little loud, so maybe the rubber bushing thing would be a good idea.

Did you mount your aluminum bracket on the rubber shock mounts that held the original pump? They should provide some isolation.

did I mount it on those rubber mounts??

of course not, that would be too smart.

T

http://www.914world.com/bbs2/index.php?act=...5147&hl=mallory

Wish I had known about this Mallory pump before I bought the 75-76 914 pump. It looks like a better pump at a lower price with the bracket attached. Next time (which I hope won't be a for a while). I'll call up Summit Racing and get one of these.