924Board.org

mr_hyd3 · Joined: 28 Jul 2010 Posts: 9 Location: Washington

So I'm looking at buying a 924 but I'm worried about the lurching problem it has. It starts up fine but when it's going down the road apparently it starts to lurch after a minute or two. I think it may be a gear problem but I'm not sure.

Any ideas would be extremely helpful

Scorpio · Posted: Wed Jul 28, 2010 11:58 pm Post subject:

sounds like an Adams Family car
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1979 NA
MS1..EFI..
GARRETT T25 TURBO
BILSTEIN SHOCKS
GT BASED CUSTOM BODYKIT

Brisbane , Australia
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all youll see is
my Porsches Arse!!!

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

Could be fuel delivery or ignition related.

Can you tell us what year 924 you're looking at?

How old is the gas in the tank?

When was the fuel filter last changed?

How are the fuel lines under the car?

Any idea on the age of the fuel pump?

What condition does the wiring under the hood look like?

How about the fuse panel and under-dash wiring?
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

brealytrent · Joined: 28 Dec 2008 Posts: 414 Location: Goldsboro, NC

My car does the same thing. After a year of daily driving, still alive.
I've tried multiple things, changing the timing, changing the plug wires, checking the egr valve, nothing. It has to be an electrical problem, but where?
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1977 Porsche 924 - sold
1980 Porsche 931 - sold
1984 Porsche 928 'S2' Euro - sold
2016 Ford Fiesta ST - sold
2009 Porsche Cayman

mr_hyd3 · Joined: 28 Jul 2010 Posts: 9 Location: Washington

its an 89, fuel filter replaced not too long ago, fuel pump has been looked at and there are no apparent issues, all parts original except for new fuel filter and new injectors not too long ago. As well as a new exhaust system if that makes any difference

mr_hyd3 · Joined: 28 Jul 2010 Posts: 9 Location: Washington

and i have images now of the things you asked about but i dont know how to post them in the thread[/img]
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joejax · Posted: Thu Jul 29, 2010 8:00 am Post subject:

Wow! An '89? Talk about rare.

Definitely sounds fuel related.
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I got nothin'
Uhhh...you got any pics?

Zeek · Joined: 09 Jul 2010 Posts: 107 Location: Shady Side, MD

Do you have an issue with sudden spasms of your right leg?

No? Never mind, then.

D Hook · Joined: 02 Nov 2002 Posts: 3158 Location: Omaha, NE

They didn't make an 89. How 'bout a '79?
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'80 924 n/a SOLD

mr_hyd3 · Joined: 28 Jul 2010 Posts: 9 Location: Washington

yeah sorry 78

mistype on the date. So what should be the first things i look for as to whats causing the problem? I've looked up all the troubleshooting info i can but nothing pertains to a lurching issue after you get it on the road
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!tom · Posted: Fri Jul 30, 2010 2:37 am Post subject:

Fuel pump relay and associated wiring.

Ignition switch.
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78 924 NA
5-lug

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Lean running. Check system and control pressures, and check WUR function. If pressures are good, adjust mixture.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

mr_hyd3 · Joined: 28 Jul 2010 Posts: 9 Location: Washington

Ok so what would be the best way to go about testing those pressures?
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Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

There's some dude on the Board who sells the appropriate pressure test kit for CIS, but his name is slipping my mind ATM. . .

Maybe he'll reply to your inquiry.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

mr_hyd3 · Joined: 28 Jul 2010 Posts: 9 Location: Washington

how much would it cost for said kit? If there's an easier way to go about testing for the problem i would rather do that seeing as this is a first car and i would prefer to not put all of every paycheck into it
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Go big or go home