tm2wrench

help needed,new to forums,bought a 1978 928,car will run with starting fluid,was told it has new fuel pumps and,filter,disconnected the inlet fuel line to the fuel distributor,got great flow,bought a fuel distributor off ebay, was told it came from a running car,also getting low fuel pressure to the injectors,and the,warm up regulator,getting voltage to the warm up regulator,also before installing the fuel distributor,made sure the control plunger moved freely .Thanks Mike

James Bailey

to do anything with CIS you really need the two fuel pressure gauges to measure system pressure and control pressure... you are chasing a problem which the prior owner failed to resolve.

You might try pushing down on the disc that floats in the air column with fuel pump jumpered (briefly) to see if you can hear fuel going through the injectors.
I am guessing your control pressure is way off keeping the metering plunger from moving..the Delorean I helped start after 20 years had that problem then the fuel dist seized up

tm2wrench

Thanks James,i pushed down on the disk,i could something ,but didn't sound like strong fuel pressure,I don't own a set of Gauges,and local parts stores gauges appear to be for American cars(fittings won't fit the cis)I would have to try and rig something up.Thanks mike

928 at last

Pretty sure Roger has a kit for the gauges....

SteveG

He means Roger Tyson at 928srus.com; 817-430-2688.

The other major supplier is 928 International in Anaheim, CA. 714-632-9288.

928 at last

Didn't realize the OP was new.

danglerb

Post your location and somebody near you may be able to help, or have the gauge set. If you buy one from other than the mentioned vendors, make certain it works with Bosch CIS so it will have all the fittings etc.

BTW I hate to hear it, but get it all the time from sellers, it starts with starting fluid, tells you almost nothing useful as the spark might even be weak and still work on starting fluid.

SteveG

So true, could be weak batt, or bad ground.

tm2wrench

Thanks guys ,I'm going to try and get some gauges from somewhere or someone ,btw the car will start,and run, if you pour a little fuel down the intake,does anyone have the specs for fuel pressure,and control pressure,and how do you adjust it.Thanks Mike

ammonman

Contact Roger Tyson @ 928sRus and ask to buy a set of "Morehouse CD's". The 3 CD set compiled by Jim Morehouse has just about every piece of technical info Porsche produced for the 928 including a complete factory Workshop Manual, all the annual Service Updates, and troubleshooting guides for the major systems. Unless you are going to pay someone else to work on the car you will not survive without these CD's.

Mike Hays

tm2wrench

I'm located in Henderson NV,anyone out in las vegas or Henderson got any fuel pressure gauges ,let me know.Thanks Mike

jeff spahn

see if polecat has some. search for him on this site. his 928 is older but perhaps he does or knows someone in LV that does.

soontobered84

Jeff,
Polecat's 928 is an '89

VegasGnome

I have a pressure gauge set you can use--it has all the fittings but with only one gauge. I'm in Henderson also, PM if interested.

tm2wrench

Thanks Glen,I send you a message.Mike