924Board.org

[tbramich]

well i'm new here and just picked up a 1980 931 that hasn't run in a few years. i was told it died due to a fuel issue, it came with a lot of spare parts but no fuel stuff so im not sure what is really wrong with it yet.
this is my first porsche but i built a few other cars so i have a good mechanical history (plus i do mechanics for a living).
a previous owner has started to convert the car to look like a gts -fenders, rear flares wing,and front bumper have been done. i was given the gts hood scope but it has a stock scope in the hood currently. the headlights are the flip up ones but i'm going to have to swap them to fixed some how once i get it running as i want to install a front mounted intercooler.

got it in the garage tonight so i'll be getting going on it tomorrow.

thought i'd say hello to all you techi guys since i'm sure i'll be needing some help to get it going.

oh yeah also forgot to mention my car has rear drum brake so i fear its got the old vacuum / digital ignition.

[ideola]

Is it black? Listed for around $1500 or so on Craigslist recently?

As a 1980 (series 1), the car will NOT have the digital (DITC) ignition system, it will have the earlier CD setup with coil and vac advance/retard on the ignition distributor.

If you haven't seen these already, here are two MUST READ threads for the new 931 owner, particularly one that needs the work you describe:
931 Resuscitation - how to resurrect a long-dead turbo
A Systematic Approach to 931 Diagnostics

Welcome aboard, and best of luck! It will be great to see another one brought back from the abyss!!!
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erstwhile owner of just about every 924 variant ever made

[tbramich]

why yes you hit the car on the head exactly. but i didnt get it for $1500 - it was a much better deal
thanks for the links

[ideola]

[tbramich]

got a link?

so far this is what i have done:
1- oil change
2- inspected and tested antifreeze
3-tested compression all 4 just over 100 psi. - guessing thats ok with such low comp ratio but im used to seeing over 140.- could be stuck rings also since its been sitting a while- i fogged the cylinders.
4-tested spark of all 4 plugs and wires- strong.

next i'm planning to drop starting fluid in all 4 cylinder and see if it will pop off for a second. if it does pop im moving on to the fuel system (drain and flush) i got a measuring cup to see if it does the 750 oz in 30 seconds (cheap alternative to pressure gauge & i already had it)

** never heard the fuel pump click or turning on.

[tbramich]

anyone nearby that has some experience on the 931 feel free to drop me a line or stop by.

[tbramich]

forgot to mention as i installed the new battery i saw a wire that came off the + terminal and went throught the little fire wall and directly to a relay. it has a large black connector that looks like a fuseible link- didnt take it apart yet.

so 2 things about it :
1 mine looked connected but was not actually making contact to the terminal. it was stuffed in tight but just looks like it was broken off (saw it before i installed the new battery)

2 what is that for? - got my fingers crossed that the car starts up when i reconnect it. doubt it though

[tbramich]

that wire is a fusible link and it tested good.

i sprayed starting fluid into each cylinder and cranked it but had no luck. so i connected that wire (mentioned above) and still no luck.
i then sprayed it directly into the air box and still nothing not even a pop.
am i mistaken that the car should at least pop with this method? other cars that i purchased that had not run in over 10 years would pop and rumble before dieing so i figured this should do the same.>????


i opened the fuel line on the engine side of the filter to check the flow and as i thought there was none.

my relay has been pulled for the fuel pump not sure where it went but there is some rigging of a new relay hanging below the fuse box & i think that was some homemade fix for it. i will dig into that tomorrow

[ideola]

Before you do anything else or crank it over again, you should change the timing belt and the tensioning roller. The parts are cheap, it's easy to do. If the belt breaks or strips teeth you will incur thousands of dollars of damage to the valves because the 931 is an interference design, so don't take a chance.

Do a search at www.jcwhitney.com for item # 18126G (the link to the product changes periodically) or search for the Hoffman CIS Tester. This item used to sell for $60, but when I just checked it was only $34.99. What a deal!
_________________
erstwhile owner of just about every 924 variant ever made

[Smoothie]

Whoa - $34.99 will get you the wrong one, and the correct one is still $59.99.
Here's the current link to the CIS tester (SKU Number: 1JA 123617) - <click>

The $34.99 one states "For all fuel injection systems except CIS-K-Jetronic Bosch® systems and..." - <click>

-And they still have their pics [and titles] screwed up, so disregard them. (They're showing the CIS tester image under both the wrong one and the right one.)
_________________
"..it's made in Germany. You know the Germans always make good stuff."


'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

[ideola]

Yeah, but this one says specifically that it is for the Bosch CIS K-Jet, and it's only $34.99 <CLICK>

I'm confused...
_________________
erstwhile owner of just about every 924 variant ever made

[tbramich]

i now this sounds stupid but before i start tearing into the engine heavily i wanted to hear it pop off to make sure that it will start. i would hate to do a lot of work to find out i need to tear out the motor and rebuild it. at that point i would probably be looking for a replacement motor- from what i saw it might cost less than a good rebuild.

the belt doesn't look bad, i dont see any cracks on it but the writing is warn off & i know thats a good sign to replace it.



thanks for the JC Whitney#'s

[ideola]

Changing the timing belt is hardly tearing into the engine. It's less than $35 in parts and can be easily done with standard tools in 2 hours or less. If you don't change the timing belt and keep cranking it over to see if you can get it to pop off, you are taking *significant* risk at incurring thousands of dollars of damage. For the sake of the 931, DON'T DO IT! Change the timing belt. Please!
_________________
erstwhile owner of just about every 924 variant ever made

[Smoothie]

[emoore924]

I'll give you $50 for that hood scoop that was in the trunk. PM me if you want to sell.

Oh, and welcome to the board. I had a feeling we'd be hearing about that car again!!