924Board.org

trumpeter · Joined: 23 Nov 2004 Posts: 57 Location: Paxton, IL

First post, but I have been lurking for awhile. I have a chance to get a 77 924 with only about 30K miles for cheap ($500 OBO). Of course it does not run right now as it has been sitting in storage for the past 10 or so years.

My primary concern was that the gas has turned to a delightful varnish over that period of time. Seller says that they have flushed the gas tank, but have gone no further. My concern would be fuel injection issues...

I'm not sure if anyone has any experience with trying to start one after so long, but any advice would be helpful.

BTW, it would be a car for my young daughter to drive, and for me to have fun with autocrossing. Currently, I run my 74 Pontiac Trans Am project that I finished building a 455 for, i.e. I have some mechanical experience.

Any help/input would be appreciated.

Thanks

Trumpeter

gohim · Joined: 02 Nov 2002 Posts: 4459 Location: Rialto, CA

On a car that old that has not run the engine in that long a period, you should expect fuel injection system issues.

Very often, you will need to replace practically the entire injection system and is will be hopelessly gummed up, and/or leaking fuel. Replacement parts need will probably require (5) fuel injectors (4) normal and (1) cold start, fuel pump, and fuel distributor (EXPENSIVE, $500 rebuilt).

You should check the water pump to see if it is frozen, before turning, and replace the timing belt for sure. The engine is non-interference, and belt breakage will not damage the engine, but if the belt jumps time, you will not be able to start the engine, and it will be hard to tell what the problem is.

blargonator · Joined: 22 Sep 2004 Posts: 100 Location: kalamazoo MI

i recently got on just like yours but mine was sitting for 5 years. it was running for maybe 2 days and then it died for no reason. the reason it died is mainly because of the previous owner and his replacement fuel pump relay. one thing is the shifter could possibly break. it was really hard to just sit there and move the shifter aroudn and my brother snapped it just moving it in nuetral. that is not very expensive or hard to replace. it sounds like a good deal because i got ripped off paying 1,000 for mine.....good luck though.

trumpeter · Joined: 23 Nov 2004 Posts: 57 Location: Paxton, IL

SOunds like it could be an expensive roll of the dice. I was thinking that one could just clean the injectors as I don't think they have any moving parts. Of course it would no doubt need new injector seals.

Anyone else have any input?

I think I'll price the parts and see if he will adjust the price a bit.

Trumpeter

My924gtc · Joined: 14 Aug 2004 Posts: 1362 Location: 248

You can clean the entire system. Start with the tank. Clean it out, and have the inside sealed to prevent rust from becoming a problem. Clean the lines, replace the fuel filter, remove and "rebuild" the dizzy yourself with a good carb cleaner (take it apart and clean everything inside), replace the lines to the injectors, and replace the injectors themselves. You can clean the lines and injectors, but proper atomization is key to good performance and the injectors are > $100 for all four.

I'd say this can be done for less than $350 and will yeild a nearly new system.

Trywww.eastwood.com for the sealer and cleaner. You'll want their catalog anyway, they have a great assortment of finishes and specialty tools.
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trumpeter · Joined: 23 Nov 2004 Posts: 57 Location: Paxton, IL

Thanks guys!

Mark, I like the idea of taking apart the fuel distribution unit. I can't imagine there would be many moving parts. Once I get the car and a manual, I'm sure all of this will make sense.

I've also been searching and reading the threads regarding injector cleaning. Of course a Porsche almost 30 years old deserves some new injectors...

Trumpeter

Lizard · Posted: Sat Nov 27, 2004 10:12 am Post subject:

In regards to the injectors, buy new ones, they arent expensive, and you have to have them cleaned by a shop with proper equipment as they do have moving parts and are NOT electrically opened, they are pressure opened
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3 928s,

augidog · Joined: 03 Mar 2003 Posts: 1360 Location: New Jersey

If you’re anything like me, I bet you’re dying to turn it over.
This is what I would do.
Empty the tank from the first hose out of the tank -flush with some clean gas.
Remove the filter before the fuel pump and clean it out (its just a screen) maybe put a temporary plastic see through back in.(temporary only, it will catch some rust if you get it started)
Hook the hose back to the pump and remove the other side and put it into a bucket.
Jump the wire on the fuel relay- run the pump for a min into a bucket.
Change the fuel filter up front and disconnect the hose before the wur.
Run the pump
Disconnect the lines at the injectors
Run the pump.
If your going to replace the injectors anyway,- hook up everything and give it a go.
Run some system cleaner on just a few gallons if you get it going.
Good luck
Watch the fumes.
_________________
1978 924 95 mile daily driver.
Audi TB/POR174M/High Flow Cat/2.25" exhaust
I knew that positive thinking thing wouldn't work.

trumpeter · Joined: 23 Nov 2004 Posts: 57 Location: Paxton, IL

Wow, you guys are GREAT!

The current owner has already flushed the tank, so that will be a good start.

As for injectors, I see that I could get them at the local NAPA. Is there a better place?

Looks like I will head over to Indiana and pick up the Porsche on Sunday. Once I get her home in the garage, I will update evreyone.

Trumpeter

blargonator · Joined: 22 Sep 2004 Posts: 100 Location: kalamazoo MI

keep me updated with your progress because i have a 77 (early half)

trumpeter · Joined: 23 Nov 2004 Posts: 57 Location: Paxton, IL

I will certainly keep you guys updated!

Trumpeter

Vince Ponz · Joined: 02 Nov 2002 Posts: 3581 Location: Florida

4 injectors for $100? Where can I get new injectors for the turbo cheaply?

Vince
_________________
"Never let them see you sweat"
77.5 924 modified track car
79 931 Euro stock
88 924S SE
87 911 Targa stock

alxch1n15 · Joined: 26 Nov 2004 Posts: 261 Location: Madison, Wisconsin

hey, if possible post some pic's

Paul · Posted: Sun Nov 28, 2004 2:44 am Post subject:

emoore924 · Joined: 13 Apr 2004 Posts: 2822

I'd probably get the old fuel drained out then add a gallon or so of new fuel in. Change the oil. Check the antifreeze. Disconnect the high tension lead from the distributor and crank until you get oil pressure. Then reconnect and see if she starts.

You might be surprised.

Then I'd probably add a can of ventil sauber or anything with techron in it and add a few more gallons of fuel. Run for 10-15 minutes or so, then add about 5 gals. If you've gotten this far, you're in great shape.

I would be very very very careful of the braking system. It is likely that sitting 10 years caused the brake calipers to rust worse than the golden gate bridge without paint. So, if you do get it running, *don't* go for a hoot until you're sure the brakes are working properly...