Brentb1

Today I was approached by a gentleman that is selling a 924 turbo. The car is in good shape 7.5/10 but when you start it, it will run for a few seconds and die. He told me it is a bad turbo which I don't believe is the case because the turbo does nothing on start up. I could be mistaken but if not does anyone know what this could be? He is selling it at a very good price but said he is selling it as is and does not want anyone messing with it to try and figure out what the problem is. Also it idles fine for the few seconds then shuts off, almost like you turned the key off, it doesn't jerk or seem like it is starving for fuel. I am not sure of the year I believe it is an 85

931guru

If the price is very, very low, then consider it.

Otherwise, RUN AWAY!

admiralkhole

No kidding...something like <1k

Could be a great find/deal though.

924-76

You are correct, sound like a CIS (continuous injection system) problem; auxiliary air valve, warm-up regulator, poor air to fuel ratio, etc...

What are you considering a good price?

79-80 924 turbo S1
81-82 924 turbo S2
no turbo was produced in 85


I have an 80 924 turbo S (sport package available only in 1980) and I love it, fun car.
I'm not an expert with CIS but few guys here would be able to help and you should get some pics and join "924.org", forum specialized on 924 with few really good guys that can help you.
Important question, how long the car has been sitting?
And one last point, there are no cheap Porsche. The lower the purchase price, the higher the bills to get it back on the road will be.

admiralkhole

More info?

kcoyle

Repairing the fuel system can get expensive especially if it's been sitting.
Sounds like it may be running on the cold start valve only?

CIS explained below.

Brentb1

The price is $1,000 which I think is a good price. I have a 951 and want to buy this one as a father son project. After completion I want to give it to my son for his first car. From what I have read on the site the 924/931 has more problems then say the 951, so I just want to have an idea of what is a head of me. What are the most common problems I would want to remedy before handing it over to my boy. The car is rust free but has faded paint, the interior is in really good condition. He told me it would cost 3 or 4k for a new turbo. I am not sure where he got that price from but one thing is for sure he knows very little about a turbo. This car is just down the road from me so it wouldn't cost anything to get it home. He actually seen my 951 pulled in the driveway and asked if I would be interested in his 931.

Brentb1

The car has been sitting for 6 years but is in a building with concrete floors. I am assuming the gaskets, belts, tires, etc. would need to be replaced.

Alpineace

It could be like the one I recently got, it was simply the Warm Up Regulator (actually more of a fuel regulator) I rebuilt it and it it works fine.

its really not that complicated.
Dont listen to these morons.

could be a fuel pump/filter

See if you can rev it a little when it runs, If so, then you are good to go.

See if he will let you atleast pull out a fuel injector and see if it sprays (you have to push down on the CIS meter plate (connected to the snorkle next to the air cleaner)
youll have to jumper the fuel pump under the dash.

It really doesnt sound too bad. see if you can get it for less, but either way, it should be relatively simple fix.

924-76

The S package included:
-four-wheel ventilated disc brakes
-five-bolt hubs
-forged 16 x 6-inch trash can
-upgraded front springs
-23mm front and 14mm rear anti-roll bars

My 931 is a 937 want to be:

-dropped about 300lbs, fibreglass hood, plexiglass hatch, GTS headlight, manual seat, manual mirror, manual window, delete A/C, delete driver and passenger sound reducer mate, delete rear seat top and bottom, delete rear sound reducing mate, delete rear carpet, no spare tire and jack, delete radio and speakers, delete rear ¼ inside panel, light weight battery (12lbs), remove sunroof inside panel, cut bottom part of center console (GTS style)...

-new Bilstein HD all around
-sway bar 23mm front, 16mm rear with KLA link
-poly bushing on sway bar, torsion bar, front and rear arms
-solid bushing on torsion bar carrier mounting point
-solid KLA top strut

-915 pressure plate, rebuild clutch and resurface flywheel
-new poly shifter bushings and short shifter
-new clutch master and slave cylinder

-redline roll bar

-RUF in cabin manual boost controller
-GT top mounted inter-cooler
-ceramic coated S2 exhaust manifold and J pipe
-high torque starter
-rebuilt alternator

-new weather strips (hatch, hatch lock, sunroof, door, window scraper and ¼ window)
-944 rear spoiler
-AIR fibreglass GTS front bumper, rear flare, hood scoop and rocker panel
-944 front fenders
-euro rear bumper
-944 script door handle

-951 fuchs, 7x16 with 205 and 8x16 with 225

And I probably forgot few more things
I’m currently running 10lbs of boost, planning on going to 12lbs later

admiralkhole

I like what you've done to your car! Very cool. I also never knew about the S trim. Thanks!

kcoyle

Correct sir. The 931 is an interference engine so timing belt is key. It's also cheap and relatively easy to do so that's a plus.
There are a few NLA parts for these but no real show stoppers.

Here is some required reading.
http://www.924board.org/viewtopic.php?t=22724

konakat

This guy specializes in 931's if you need any parts. http://garage.ideola.com/

morghen

Maybe its just the fuel pump relay...they are supposed to run for a short amount of time and then turn off the pump if they dont get signal from the coil that the engine is runing.
Buy it or post the details on 924board.org as someone there will buy it.
The 924 turbos are getting very rare and expensive.

morghen

Your 924 looks pretty cool and i guess its fast too, should be above 200HP.