Almost no fuel to injectors suspect fuel distributor
01-29-2011, 06:16 PM
#32
Intermediate
Thread Starter
I rebuilt the fuel distributor again yesternight and today car starts and revs up to 3 0r 4000 rpm. Guess I made a mistake the first time. But now it smokes out my whole neighborhood with gassy smelling clouds of white smoke can the wur make this happen? I suspect the pressure is to high on the wur. Because it seems to fight me when I manualy throtttle and push down the air meter door at the same time under the hood . I siphoned 99% of gas out of car when I started this added a whole can of barrymans chemtool injector cleaner and iso heat with 14 gallons of fresh fuel. Does anyone think it is possible that the fuel is still bad and making it smoke. I used the 14 gallons of fuel and added 5 more today. thanks again for everyones help. I still am going to check the wur pressure but I will have to make my own gage can't find one locally. Also I checked the vacuum line doesn't seem to be a leak.
01-30-2011, 05:53 PM
#36
Intermediate
Thread Starter
Have good reading on the wur with fuel pump jumped and car off I got 11.4 volts. The smoke is white maybe steam but it is full of fuel and burned up 5 gallons of fuel from a few minutes of idling. I hope it is not a head gasket or I will have to learn how to do that next. Does anyone know how to drastically lean fuel.
01-30-2011, 06:35 PM
#38
White is definitely due to water. It could be from water in the fuel, exhaust system or a head gasket leak. Concerning the fuel usage and adjustment, 5 gallons in a few minutes is way more than can be adjusted out, so I wouldn't mess with the A/F mixture until everything else is fixed. Start by looking for fuel in the lower plenum (below the air sensor plate). If you have fuel there the large o rings in the fuel distributor is leaking and needs replaced. If the plenum is dry. unplug the cold start valve. If it doesn't shut off when the engine is running there could be an electrical problem.
Dennis
Dennis
01-30-2011, 08:24 PM
#39
Intermediate
Thread Starter
I just rebuilt fuel distributor twice Maybe the orings I used were wrong size. AAHHHHHHHHH I didn't see any fuel but it was hard to see in there I could only see the sides not bottom. Thanks Does anyone think it is possible to have so much fuel running through that it is turning gas to smoke or vapor? If anyone is interested I am going to sell my 1979 5 speed 928 with 91000 miles on it. The interior is not nice and po sanded car so needs painted. Not sure if it is a euro
01-31-2011, 12:13 AM
#40
Rennlist Member
White smoke (not steam)could be brake fluid, being sucked down the booster line.....pull the vac valve out of the booster body, put a wire in and see if it comes out wet - more than just the tip means a leak from the m/cyl.
jp 83 Euro S AT 53k
jp 83 Euro S AT 53k
01-31-2011, 08:38 PM
#41
Intermediate
Thread Starter
well it is definetley gasoline pouring out my exhaust. I let some drip on a plate and then lit it on fire with a lighter so it is with out a doubt gas. I guess I have to order the exact orings. All of my oring were the correct size except the one on the barrel I stretched on some smaller ones because I couldn't find ones that were thin enough that were that large I called 20 diferent places and some said they had the right size but when I got there they didn't I bought cases of orings just to get most of the sizes I needed. can the pressure valve cause this much fuel to go in my valves and out the exhaust Thanks
01-31-2011, 09:26 PM
#42
Shameful Thread Killer
Rennlist Member
Rennlist Member
Before you do that. Locate the mixture screw in the well between the air damper plate, and the fuel metering head. Down in that well is the screw which will change the fuel air ratio. We have no idea where it's set.
Start the car once more, and while it's running at fairly low RPM, with the damper plate nearly closed use a long 3mm allen wrench and turn the adjustment to the left(CCW or anti-clockwise). It's best to seat the tool into the mixture screw before starting the car because it's difficult to know if it's seated well in the hex receiver. Turn the screw left until the car starts to die. Once you're very lean, leave the mixture there for a while to burn out the overly rich mixture in the system. It may take several minutes.
Keep it as lean as possible with continuous adjustment at low RPM. Hopefully it'll clear out, but if not you can go back and start replacing parts again.
Start the car once more, and while it's running at fairly low RPM, with the damper plate nearly closed use a long 3mm allen wrench and turn the adjustment to the left(CCW or anti-clockwise). It's best to seat the tool into the mixture screw before starting the car because it's difficult to know if it's seated well in the hex receiver. Turn the screw left until the car starts to die. Once you're very lean, leave the mixture there for a while to burn out the overly rich mixture in the system. It may take several minutes.
Keep it as lean as possible with continuous adjustment at low RPM. Hopefully it'll clear out, but if not you can go back and start replacing parts again.
01-31-2011, 10:46 PM
#43
well it is definetley gasoline pouring out my exhaust. I let some drip on a plate and then lit it on fire with a lighter so it is with out a doubt gas. I guess I have to order the exact orings. All of my oring were the correct size except the one on the barrel I stretched on some smaller ones because I couldn't find ones that were thin enough that were that large I called 20 diferent places and some said they had the right size but when I got there they didn't I bought cases of orings just to get most of the sizes I needed. can the pressure valve cause this much fuel to go in my valves and out the exhaust Thanks
http://www.porsche928forums.com/down...CISRebuild.pdf
Dennis
