924Board.org

[jackh]

Hello! I’m new to this whole forum thing, so hopefully I won’t mess anything up. I have a 1979 Porsche 924 NA 2.0. I pulled this out of a junkyard over a year ago. From what I can tell it has been sitting for over 25 years but is not a complete rust bucket. In these last few weeks I was able to get it running it ran decent for a bit, didn’t idle very well, and smoked a lot which I figure is from all the gunk. I have replaced the fuel pump, filter, and injector lines.

My first problem is that the engine is hydrolocking. From my knowledge, to fix that I need to change the FPR, and maybe the fuel distributor. My car does not have an in tank fuel pump, either.

It also has a major oil leak, in which it will leak about 3 quarts in a week. I have no idea where it comes from, but I think it is from multiple places. When I took off the exhaust to look better at the back of the engine, a gallon of gas dumped out all over me.

I also compression tested it last week. Cylinders 1, 2, and 3 held 120, but cylinder 4 only held 60. I don’t know why.

At this point, I’m stumped. I just need answers and information, and advice on where to go from here. I really want to drive this car. So thank you, and please let me know if there are any more questions.

[Fasteddie313]

Your injectors are spraying without the engine running for some reason..
Filling your exhaust and oil pan with gasoline, and hydro locking your cylinders.. Must be a LOT of gas...

With your airplate at rest your injectors should not spray..
Make sure your AFR screw isn’t adjusted too rich and your plate is going back to its rear position..

The plunger in your fuel distributor could be sticking, not coming all the way back to its resting position..

Your fuel pump shouldn’t be running without you airplate moving..

Put the injectors in bottles and jump your fuel pump (haynes injector flow test).. Techron in the fuel tank..
Exercise the fuel system by running it spraying into your bottles, a lot..
Move that airplate up and down to its max travel many times..
Might free it up..


Compression, check your valve lash..
If in spec and still bad compression, something is probably not good inside..
Could just be stuck rings or something and needs to be ran..
I’d try Messi g with the fuel system and running it before tearing it apart to chase low compression (except valve lash, do that)..
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80 Turbo - Slightly Modified

[65sprint]

Hi, Welcome to the elite and exclusive club of 924 ownership. My advice first and foremost, is to restore the vacuum system. As crazy as it sounds, about 3% of 924 engine pictures I see on the internet have correct vacuum lines/routing. For some reason people like to rip those out, maybe because they think that they're smarter than the researchers at Porsche who spent eight years in laboratories and test grounds to make sure the engine was getting the correct air/vacuum amounts to make the car run right. That's why alot of 924's for sale on the internet are selling cheap, because people can't get them to run reliably; while not noticing that the vacuum system is damaged, rigged up, or missing. My car is the perfect example; I bought it for $800 because it was running erratically, hesitating, stalling, losing power, hard starting, etc. So I bought the Chiltons book with the vacuum diagram and restored the whole vacuum system. That included replacing cracked and missing rubber unions, damaged and missing plastic vacuum lines, and correcting all the routing. Then after that, the car ran beautifully. So in the end, a car that was left for junk because of "engine problems" was fixed by me at a cost of $22.