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oharris · Joined: 06 Oct 2014 Posts: 37 Location: Peyton, CO

Hello all,

I just bought an '80 931! It's pretty rough, but it seems to be all there and I only gave $400 for it. It last ran 3 years ago and hasn't been licensed since 1993. I've learned from reading this board that I should replace the timing belt before doing much of anything. I also found the thread about getting a long dead 931 started so I will be following that advice.

The first problem I have is I didn't get any keys. The owner said he had it sold a year ago, gave the keys and the title to the buyer who was going to return later for the car. The guy's check bounced and he never saw him again. He got the title re-issued, but still no keys. Are the door key and ignition key the same? I'm hoping to just remove a door lock cylinder and take it to a locksmith. I found a thread on removing the lock cylinder, but one of the steps was turn the key to acc. Is it possible remove the ignition lock cylinder without the key or am I going to be stuck drilling the thing out? Is there at least a way to get the steering wheel unlocked without the key?

Thanks in advance.

924-76 · Joined: 05 Jun 2006 Posts: 1487 Location: Ontario, Canada

Welcom and congrast on your purchase
BTW need need to see pictures

oharris · Joined: 06 Oct 2014 Posts: 37 Location: Peyton, CO

oharris · Joined: 06 Oct 2014 Posts: 37 Location: Peyton, CO

oharris · Joined: 06 Oct 2014 Posts: 37 Location: Peyton, CO

Well here she is.

oharris · Joined: 06 Oct 2014 Posts: 37 Location: Peyton, CO

The inside isn't too bad really.

The front seats are both splitting at the seams.

The Dash isn't too bad.

This is supposedly the original mileage.

The middle is the A/C control? There are a pair of knobs on the console that appear to go to it.

There is only one switch on the center console, what does it do?

oharris · Joined: 06 Oct 2014 Posts: 37 Location: Peyton, CO

Under the hood. It looks like it's all there.

Something has been munching on the wires though.

What is this sensor?

Brake light switch?

The rubber covers over the fuel lines are cracked pretty badly, but they are just covers right?

Are these just covers too?

These straps that hold the air filter together are rotted through, where can I get new ones?

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

center console switch is to switch the mirror control (which is under the driver's side armrest) from right to left.

Yup, center switch in the gauge cluster is for the blower speed.

911, 928 and 944 seats will fit and there are seat recovering kits as well.

Expect to replace all, and I mean ALL of the rubber under the hood. CIS systems will not work well if there are vacuum leaks anywhere (including the dipstick) and turbo cars are very sensitive to fuel volume.

Yes those are covers for the fuel lines with a braided line underneath that is covering plastic or rubber hose which will likely be brittle and failure prone.

Plus you'll need to pull the CIS system and fuel system apart, clean it all out (starting at the fuel tank and working forward) so while you're in there...

All of the electrical connections under the hood, under the dash and in the trunk will need to be cleaned, repaired and covered in connection grease.

You've got a lot of work ahead of you, I wish you luck!
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

lesworth · Joined: 01 Oct 2014 Posts: 1 Location: UK

oharris · Joined: 06 Oct 2014 Posts: 37 Location: Peyton, CO

I found the straps and the elbows at Ideola's garage and ordered them.

This car was supposed to have been stored inside up until 3 years ago and the seller said it ran when it was moved to outside storage. The license plates that were on it expired in 1993 though so it has been a long time since it was driven regularly. It was stored outside in Black Forest Colorado which had a huge fire last year burning over 500 homes. The car was only a couple hundred feet from the edge of the burned trees so it may have gotten pretty hot. That might explain the condition of the paint on the hood and roof, but I don't know.

oharris · Joined: 06 Oct 2014 Posts: 37 Location: Peyton, CO

I've started working on the wiring which had gotten chewed. I wanted to make sure I'm on the right track as there are several that were chewed and I'm not sure exactly where they go.

I removed the alternator to take this shot. There is a pair of wires that appear to go to an injector looking thing. I took an injector connector off a Ford harness and it clicked right on. I'm assuming it connects to the pair of wires in the harness that I have laid it over here?

Also coming out of that same harness, there is a single wire sticking out. I'm thinking this goes to the ground on the left?

I'm guessing this wire in the center of the picture goes to the sensor on the upper left?

Thanks in advance. My haynes manual should get here tomorrow so hopefully I won't need so much help.

Fasteddie313 · Joined: 29 Sep 2013 Posts: 2596 Location: MI

the injector looking thing = frequency valve

pretty much what it does is open and close all the time at varying frequencies adjusted by the lambda circuit, sending some fuel back to the tank, to fine tune the air fuel ratio against what the 02 sensor tells the computer.. it changes the fuel differential pressure under the diaphragm in the fuel distributor to speed or slow the flow of fuel from the metering ports in the piston due to pressure differential, more difference = more flow

if its a bare braded wire its a ground

that sensor on the charge tube "overboost sensor" cuts fuel in event of overpressure due to a malfunctioning waste gate so it wont just produce unlimited boost..... the wire that goes to this sensor needs to be grounded in order for the fuel pump relay to come on, an overpressure situation ungrounds the sensor and stops the fuel pumps...
in short just ground that wire to get it to run..

I wouldn't advise disassembling the fuel distributor yourself, atleast not without a lot of research, a very clean place to work, and a micrometer style depth gauge to put it back together correctly... yeah that piece is $$$ and very precision

TECHTRON injection cleaner!!
_________________
80 Turbo - Slightly Modified

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

oharris · Joined: 06 Oct 2014 Posts: 37 Location: Peyton, CO

Ian89C4 · Joined: 01 Apr 2011 Posts: 561 Location: North Carolina

probably going to need to clean out all of your fuel lines if the fuel dizzy is sticky. Better safe than sorry on that one. There are numerous tiny passages in the fuel dizzy that can easily get clogged with the tiniest amount of fuel varnish.
_________________
Ian Edgerly
North Carolina

Current:
1981 924 SCCA/ChampCar Weissach Race Car ("Serenity")
1987 924S ChampCar Endurance Car ("Der Weg")
1980 924 Euro ("Wahala")