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Almost no fuel to injectors suspect fuel distributor

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Old 01-23-2011, 12:07 AM
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kingster
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Default Almost no fuel to injectors suspect fuel distributor

I rebuilt my fuel distributor now it starts but has so much fuel it is coming out of exhaust. Can someone please tell me where to get a fuel distributor as cheap as possible.

Last edited by kingster; 02-22-2011 at 02:58 AM. Reason: needs more info
Old 01-23-2011, 12:10 AM
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kingster
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It is a 5 speed if that matters
Old 01-23-2011, 12:57 AM
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docmirror
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Most likely clogged fuel dist. If you break a line, have it replaced. It will need to come apart and cleaned completely. Very hard to do in place, but not impossible. The cold start injector is getting it started, but the fuel dist won't pass any fuel to keep it running.

Trans doesn't matter.
Old 01-23-2011, 05:25 AM
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smiffypr
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Have you tested the system fuel pressure or the rate of flow (at the return to the tank). Sounds more like a dead fuel pump, but you need to test those two items before coming to any conclusion.
Old 01-23-2011, 08:49 AM
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jwillman
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I also have a 79 that had been a non-runner and I am bringing it back to life.

First the fuel pump noise. I believe that the pump circulates ecess fuel back to the tank (top return hose) as it supplies more fuel than the engine can consume so a noisy pump would not neccessarly be explained away by back pressure.

My fuel was yellow when I dropped my tank. I put clean fuel in it with along with pumps and filter changes and within a short time it was yellow again and thought on the board was the fuel was cleaning the varnish out of the system. I had the car running but one day it did not start. I pulled the distributor and the screen filter at the fuel intake was blocked. I pulled it out and could not see or blow through it. I cleaned it out with brake cleaner as well as spraying out all the other ports ( did not disassemble and reinstalled.

When I went to test for fuel flow I still had nothing (no fuel out the top ports with pump jumped). I instantly thought I had screwed something up. A Rennlister pointed out that the air fuel plate needed to be depressed slightly to get fuel to flow out of the distributor. As soon as I pushed down on that plate with the pump jumped I had fuel flowing out of all eight distributor ejector ports. I reassembled and she started right up.

Good luck.

Last edited by jwillman; 01-25-2011 at 10:39 AM.
Old 01-24-2011, 08:54 PM
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kingster
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Thanks for the input I started to clean fuel distributor by putting brake cleaner in toop; ports and then push through with air compressor. My car now idles for first time since i bought it a week ago. I am excited at least it's an improvement although completeley undrivable still. I think today i am going to put all injector lines in glass jars and fill with a cleaner and put pump on reverse polarity prop air fuel plate open turn car over and suck cleaner through system backwards. Maybe that will disolve enough crap to clesan fuel distributor. Has anyone rebuilt there fuel distributor put it back on and actually had a perfect running car. I see lots of diagrams on how to rebuild it but none has confirmed results that I saw.
Old 01-24-2011, 09:25 PM
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smiffypr
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1. I don't think you will be able to suck back up the injector lines because of the diaphragms in the fuel distributor acting like one way valves.
2. If you do get any reverse flow, you will pull all the dirt out of the filter into the pump.
Have you tested pressure and flow yet?
Old 01-25-2011, 12:06 AM
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jwillman
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Don't see the reverse thing helping given your previous comment on spray pattern. I am no expert but all the experts say that CIS systems don't like sitting. My recommendation (as given to me by those way more sage than I) is to fill up the tank, put in a can of sea foam and run the car. I found mine ran better with each drive. That assumes you have verified timing (cam marks) as well as ignition timing and ignition system.
Old 01-25-2011, 12:29 AM
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karl ruiter
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I rebuilt my fuel distributor, only to discover that there was a screen inside the its inlet fitting which was clogged. Did not see any other problems.
Old 01-25-2011, 01:01 AM
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kingster
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Does any one know where to get fuel distributor rebuild kit and where to buy or make a new main fuel line because I will have to break it to get my fuel distributor off.
Old 01-25-2011, 09:56 AM
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Dennis Wilson
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No kit for the distributor rebuild as there is only 10 o rings to replace and they are readily available at most auto parts stores. Just make sure they are fuel resistant. There is an excellent write up on the rebuild on the 928 Owners Club site http://www.928oc.org/ but you may need to be a member to access it.

Dennis
Old 01-25-2011, 10:46 AM
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jwillman
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Originally Posted by kingster
Does any one know where to get fuel distributor rebuild kit and where to buy or make a new main fuel line because I will have to break it to get my fuel distributor off.
Are you talking the rigid pressure and return lines to the distributor that run from the left side of the engine and across the top of the engine?

Why do you need to break it? When I pulled mine I don't think it had ever been off and I was able to remove all the lines at the fittings (pressure , return, WUR and all 8 injector supply lines after some application of PB blaster.

Talk to Roger at 928's r us before intentianally breaking anything to make sure you have a recovery plan, i.e. a way to fix!
Old 01-25-2011, 02:23 PM
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karl ruiter
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Just follow the directions in the kit. I got the orings and shellac discussed at the local NAPA. But don't tear it apart until you check for a clogged screen in the inlet fitting.
Old 01-27-2011, 02:49 PM
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kingster
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I rebuilt my fuel distributor I did have clogged screens but my car will still only idle . I think I put it together right but it would seem I did something wrong. I put the top and bottom halves together correct so I know that is not the problem. The only thing I could have done wrong is put the steal plate in wrong. I lined up the wur (warm up regulator hole) for sure. But the thing that bothers me is this can be lined up with the plate put on up or down. Does the plate have a right direction to put on besides the meter hole. I followed a rebuild diagram and it only said line up hole it did not say remember or mark the to different sides of plate. Thanks for everyones help
Old 01-27-2011, 04:05 PM
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Ninespub
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Kingster: No insult intended, but you just kinda bit the hands that are helping you. You had responses from all over the world from people that care enough about 928's to assist newbees like you, and the majority of them are members. There is no mandatory joining of this forum but it could be the best investment you could make for your 928. Since you just bought your 928, I am confident you are going to have to come back to the well for more water. If you **** in the water by quickly dismissing Rennlist with statements like " I am not joining a forum. especially $30 **** that I found a diagram for free" you may find that well either dry or others might **** back. Just sayin. Be gentle little grasshopper.


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