Russ In Vegas

Greetings - I've got a '79 and the mechanic is telling me that the Fuel Distributor is bad... does anyone make a kit for rebuilding them that anyone knows of?

I see a rebuilt/remanufactured one on ebay for $500, & the big stores for $600 - $1000+ - but I'm curious if it can be rebuilt relatively easily???

Thanks,

Russ & Russ

blown 87

I know a lot of them get rebuilt/changed that do not need it.

UncleMaz

+1 How well was the system flushed? Was the tank dropped and flushed? Fuel filter changed? Main line into distributor back flushed? How is the accumulator? The one thing I know about these systems is that a little debris or viscous fluid in the system keeps getting pushed around until it is flushed out and will cause all sorts of non-running/poorly running conditions if it isn't flushed. I would make sure all this was done before pointing to the fuel distributor as the problem. From what little I know, those distributors are pretty hearty.

tlsmith1999

I have never tried to rebuild one, but here is a link to a pdf file that describes how to do it.

http://www.porsche928forums.com/down...CISRebuild.pdf

tailpipe

i did mine but it leaks will try to seal it again not sure what did wrong but it was easy to do just replace some o rings worst part was waiting for them to ship in the viton o rings it took 3 weeks to get all shipped in and they were very expensive to about 70 bucks CAN for 10 of them

danglerb

If it was easy to rebuild them its hard to believe the cost would be so high, and not just for a 928, but all the CIS cars. I kind of suspect that many who have rebuilt their own fuel distributors may "think" the unit is fine and the actual performance could be far away from accurate.

tailpipe

When I took mine apart it was full of crap lots of what apeared to be rust but I think now that it was varnish that had crystalized the performance difference after was amazing I think the crap was holding the diaphrams closed it was really easy to take apart and replace the seals I think the hard part is going to be to get it to seal properly after and the only way to test it is to actually put it on a car and try it mine is leakng the first time have to take it off and try sealing it again
what can it hurt to try worst case you have to replace it anyway

Dennis Wilson

A distributor normally requires a rebuild if one or more of the 10 internal o rings go bad. When this happens you either get too much fuel to the injector(s) or fuel dumps into the lower plenum. If he took pressure readings and based his decision on a low or high system pressure it could be the relief valve needs new o rings. If the control pressure was off, the problem is either in the WUR or, again, the relief valve may be bad and pushing most of the fuel to the return line.

I hope this isn't a situation where the mechanic starts replacing parts until the problem goes away. That can get expensive.

Dennis