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Posted by: Jesco Reient Nov 25 2013, 09:58 PM

OK, I was really happy, I'm 495 days into the "Tune UP" and repair of the D-Jet fuel injection unit. After completely rebuilding the engine, Injection components, Wiring harness for the D-Jet, align boring the Type IV case, The plastic bags were empty! Yay for empty parts containers! I made the decision after check the electrical out to add Gasoline........

The Bosch Pump leaks out of the seams as soon as it pressurized like a sieve, fuel all under the pump.

That wonderful little gem of a NLA fuel pump. Any suggestions, O-ring and seal kits? I would like to stay with the Bosch pump but am I the lone ranger on this?

Is the alternative to just run a single outlet pump (Which one?) and just run the return line direct to the pump? I was really hoping after 9 years to have my wife's 914 running by the weekend.

I appreciate all the help and suggestions out there.
John

Posted by: The Cabinetmaker Nov 26 2013, 06:35 AM

I have a few good 3 port pumps, but I would use the late 2 port pump. Easy swap.

Posted by: saigon71 Nov 26 2013, 07:46 AM

My original plan was to keep the three port pump as well after restoration.

When it started leaking at the seams I looked at buying a used three port pump.

After giving it some thought, I decided to buy a new Bosch 2 port pump. I didn't want to chance a very preventable break down by using a 40 yr old fuel pump.

It's your call, but I would buy a new one - especially on your wife's car.

Posted by: The Cabinetmaker Nov 26 2013, 09:34 AM

The factory changed to a 2 port pump in 75. Napa has a direct replacement. Napa gold series pump. Under a 100. I can get you the part # later.

Posted by: JStroud Nov 26 2013, 10:00 AM

Just bought one, Napa part N69133, around $95.

Jeff

Posted by: ClayPerrine Nov 26 2013, 10:18 AM

Universal fuel pump replacement: Airtex E8445

Bolt in and go. Been running one for 3 years now. No problems with it.

Posted by: Jesco Reient Nov 26 2013, 02:36 PM

Thank You guys Very much!

I've decided that the consensus of the group is to go with the two port inline style pump, Now I'm shopping to get one in my hot little hands today! I'll be replacing the "Y" in the return with a straight through return to the tank. I'm so Glad I only put a gallon of fuel in the tank for testing it all.

Thanks for the one gallon trick to someone here on 914 world.

Posted by: sdthomas Nov 26 2013, 04:02 PM

I'm curious to hear how you re-configure the fuel lines for the new pump. Mine just died and I'm trying figure out how re-route the lines if I go aftermarket.

Wish I only had one gallon in the tank...

Posted by: JawjaPorsche Nov 26 2013, 05:52 PM

I mounted my new pump on the firewall. You don't need the Y-fuel line split back to the fuel pump since it only has two prongs. Here is picture. I used an extra coil bracket to mount the new pump since it has a smaller diameter than three prong. I have a 73. The old pump was under the battery deep in a hole! This is a Bosch pump.


Attached image(s)

Posted by: The Cabinetmaker Nov 26 2013, 06:01 PM

Hmm, the Napa unit is Bosch. Is that aftermarket?

Posted by: r_towle Nov 26 2013, 06:03 PM

Use rubber isolation standoffs, or you may feel and hear vibration

Posted by: Jesco Reient Nov 27 2013, 09:27 AM

OK, it looks like the pump I used, I took pictures so that I could show how I did my install I'll put those up later.

All I have left is the wiring as the original wires were just about an inch short of what I needed. So of course I'll over correct in my fix.

Posted by: Jesco Reient Nov 28 2013, 11:48 AM

OK, So I used the Bosch 69469 Pump. I used the square fuel filter that goes from 7MM inlet to a 12MM outlet as the pump has a 12MM inlet with a 7MM outlet. eliminated the "Y" Changed the ends on the factory wires to those supplied by Bosch in the box. This resolved the fuel pump issue.

I know I promised pictures , However the fine people at Cardomain.com have made their website so hard to navigate that was not possible today. But the picture above is basically how I did the install also, except I did use the rubber isolation mounts.

Again Thanks very much, the next adventure is following Kjell's D-Jet troubleshooting pages, The engine will buck and kick but not start. However that will be the next thread.
John

Posted by: The Cabinetmaker Nov 28 2013, 12:15 PM

Bucking and kicking sounds like timing is way off , or plug wires are off

Posted by: Jesco Reient Nov 29 2013, 05:07 PM

It doesn't "pop" out of the exhaust or intake when it tries to run. I poured a couple ounces of gasoline into the manifold and then tried to start it again. It ran for about five seconds then went back to the bucking and kicking. So my next check will be the injector points. The injectors themselves were just tested and calibrated by Marren Fuel injection in Connecticut, so I'm sure they are working.