924Board.org

[Darkfae]

Hello, I picked up a '79 924 that had sat for about six years. I replaced the water pump, the external fuel pump, fuel filter, hoses, belts, starter, alternator, fuel injector gaskets and a bunch of other stuff like brakes, etc. The issue I'm having now is car runs real sluggish, it's slow to rap up but it seems to idle fine. After the car has been running for a while it dies and sometimes back fires a few times. I've noticed that when it dies the fuel pump is not making it's normal whining the electric fuel pumps make and you can't start the car again for 15-30 min. Before I started the car for the first time I drained the old gas out of the tank and put in 5 gal. of new gas with a full does of fuel injector cleaner. I hooked up a fused power line from the battery to the fuel pump and ran the new gas with fuel injector cleaner through the system several times. The injectors were spraying nicely and the system was cycling 4 gal. of fuel about every ten minutes.

While looking in the Haynes manual I noticed the power to the fuel pump is routed through the cold start system but I have no idea where or how to start testing to see if the issue lies in there.

Please help
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'79 924 convertible

[gohim]

Welcome to the Board.

You posted your message in the wrong area. This area is for 924S cars, not 924s.

Sounds to me like the engine is running too lean. Did you mess with the idle mixture or idle speed, or ignition timing?

A vacuum leak or vacuum leaks could also cause the problem that you are having.

[Darkfae]

Sorry about posting in the wrong area, I didn't see a spot for non s type 924's.

As far a messing with stuff goes, I am running it a little lean at the moment until I go through emissions as I'm using a "high flow cat", which is Greek for it just looks like a cat. Exhaust is the next thing on the list. And a little lean is about an 1/8th turn on the lean side. The mechanic I took the car to did what emissions testing he could and said when I'm done with emissions to just turn it to the rich side 1/8th turn and I'll be good to go. I replaced the cap and rotor and the ignition coil and had the same mechanic set the timing so I'm sure it's OK.

It's interesting you brought up vacuum leaks, that's the one thing my 924 book does not have. do you know a place where I can find a good vacuum diagram?
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'79 924 convertible