This is for 84-89 Carrera; might be helpful (in a general way) to you:

http://forums.pelicanparts.com/uploa...1308072776.jpg


Can anyone share a similar schematic for a 77?

Dale

http://www.pelicanparts.com/911/911_Parts/Electrical/911_electrical_78SC_USA.pdf

This is for a 78 but is basically the same as a 77 I would think if you have a bad pump then the wiring is just fine unless it overheated and melted.

Thanks guys for the help. The new fuel pump arrived today. Now maybe I can get somewhere.

update: new fuel pump is installed, ill put the tank back in in the morning, add gas and pressurize the system, look for leaks, grab the fire extinguisher for safety and try to fire her up. Keep your fingers crossed I really dont want to have to troubleshoot CIS issues.

2 steps forward, 1 step back.

so I put the car back together today. put the tank in, hooked everything up, put fresh gas in it and then pressurized the system to check for leaks. So the old fuel pump was def bad. I turned the key and the new one spooled right up and I could hear it run and pressurize the system. all good news. Now for the step back. it would appear one of the fuel lines has a hole in it. its the line that runs from the pump over the front suspension and connects to a fitting. The hose looks fine but when I put pressure to it it started leaking like crazy. good thing I didnt try to start it!! anyway, so it seems its back under the car to remove and replace the fuel hose. im so close to getting this car running! more to come..

oh yeah, thanks for the electrical diagrams on the pump. I was able to sort that out

making progress! I pulled out the hose that was leaking and found out that the PO really really didnt know anything about cars. First, the hose is transmission cooler hose, not designed to stand up to the solvents and second their was a HUGE split in it. pics below for your enjoyment.

replaced the hose and sorted out all the leaks from the front of the car. Pressurize the system no leaks! excellent. now onto the back of the car.. I hear the CIS turn on..its pretty loud. the top of the engine looks good as far as I can see, the fuel filter and accumulator are dry. So, I try to start the car. it turns over but wont catch. Last time I was able to spray some fuel directly in and get it to start but now nothing. :( Also, to add insult to injury fuel is leaking from somewhere around the engine. I cant quite locate it but if you crawl under the back side of the car you can see fuel dripping down the exhaust pipes on the drivers side to the lowest part and dripping off.

I guess I will be reading the CIS issue threads unless you think I should be looking in a different direction.

Transmission hose??? geeze
http://forums.pelicanparts.com/uploa...1308425806.jpg

Like you say, making progress. Big benefit is now you have peace of mind regarding everything you've worked on so far. Keep up the good work and keep us posted.

Dale

With you in porsche brotherhood......

Thanks everyone for the support. I have some questions and need some advice. As I mentioned, it is leaking for fuel from some where on drivers side of the engine. The top is totally dry including the injectors, fuel filter, and accumulator. So I was thinking originally that it might be a fuel line going across the back of the engine that I couldnt see. This morning it hit me, that It might be an injector that is frozen open and just praying tons of fuel into the cylinder until it leaks out the exhaust. The CIS sounds really loud do you think there is something wrong with it? also the high pitched whine seems strange. im including a couple of short videos so you can hear what it sounds like and one so you can see the fuel rate of the leak. What do you guys think and what would you do next?? Thanks

Marc

CIS Whine.
IMG_0648.mp4 video by ricerocket1967 - Photobucket


Rate of fuel leaking

IMG_0647.mp4 video by ricerocket1967 - Photobucket

I forget what you have tried and haven't tried, so if I'm repeating please excuse me.

In regaurds to the whine: When you lift on the sensor plate do you feel any resistance or is there a dead spot? If you don't feel resistance then the piston is stuck.

As far as the fuel leaking goes: do not try to start the car with a puddle of fuel under it. The vapors get trapped on the underside of the motor and the starter will ignite it. Always have a fire extinguisher handy at least till the leak is fixed. Its possible that one of the fuel lines that runs under the back seat is leaking. If you think an injector is leaking then pull out all six and position them in glass containers. Run the fuel pump and see if any of the containers are filling up. If all six fill up equally then the problem is back at the fuel distributor.

Let us know how that work out.

First thing I did when I started dealing with fuel issues was buy a new fire extinguisher and put it in the garage next to the car. currently Ive got a pan under the leak, it only leaks when pressurized. I do not plan on trying to start it until the leaking is resolved.

Ill give the suggestions a try. Forgive my ignorance, is the sensor plate located in the air box right under the fuel distributor? If it is, then when I push up on it, there is no resistance at all and it will even just stay up there sometimes.

I can also try the injectors as well

Thanks

Marc

You got it right on the air flow sensor. The piston is stuck so you need to deal with that first. You can disconnect the fuel line (at the fuel dist) that goes to the WUR and hit it with air pressure. If that doesn't kick the piston loose you have a problem and may need a new fuel dist. But there may still be a way to fix it one you get it off.

ok, so I disconnected the line and hit it with pressure several time and no change. :( so by take it off, you are referring to the fuel dist? I guess I need to try to do that next and then what? is there a rebuild kit?

Thanks

OMG.. I just looked up what a fuel dist cost and im really hoping there is a way to either verify or rebuild/fix the issue.

Go to Lowes and get a gallon of wd40, to dollar store and get a half gallon container with a top. Pull the fuel distributor and soak the FD for a couple days.
The center pin is the part that needs to move up and down freely. If you blow high pressure air into the center hole and put your fingers over some of the others you can blow out the pin. With the pin out spray cleaner over the FD and blow it clean and dry. The pin will now slide freely up and down.
Bruce

There is no rebuild kit, but you can buy a rebuilt unit. In order to remove the FD you will probably have to lower the motor to access the three screws on top. By the looks of your FD its not going to come out easy. Be sure to cap the holes in the FD. There are little filters in there and they will fall out. Let me know when you gt i out and I'll tell you about the next step.

I had a piston stuck in mine once took it off and soaked it in oil for a few days and it freed right up if you get in a bind I have 2 2.7 fuel dist. avail. 1 is soaking in oil the other was running before I did my EFI conversion.

Thanks guys for the advice. one last thing. If im going to have to lower the engine, and the FD going to be a pain to get off because it looks rusted, plus the fact that this car was sitting for two years and leaks oil as well and I have no idea of the condition of the fuel lines running behind the engine. Would you just suggest I bite the bullet and just go ahead and pull the engine? Thoughts?

Thanks.. depending on what happens I may be asking you about that.