924Board.org

AndreasNystrom · Joined: 09 Jan 2006 Posts: 15

Hi!, i have a 924 n/a -79 that is running very rich on fuel, so my sparks gets black!, and then wont start the engine at all.

Ive noticed its going very rich, and today i saw that there was fuel in the airfilter.
So, i removed the whole thing with fueldistrubutor and the sensor plate.
When i removed the fueldist, the "control plunger" dropped out...

it didnt have any seals at all?, should it be like that?. I guess the fuel is going out this way then, and into the air, and the car goes very rich.

and if it should have seals (o-rings i guess?) where should i put them on the piston (control plunger) ?

moone924 · Joined: 05 Feb 2003 Posts: 868 Location: Douglas Wyoming

On a '79 there two o-rings in the fuel distro..... but to replace them means completely separating the two halves. Then you run into the problem of resealing the halves together.
_________________
Ryan Moone

Always shopping for a nice s2 931 to baby.
New philosophy : one car project at a time.

AndreasNystrom · Joined: 09 Jan 2006 Posts: 15

Are you sure?.. because I saw in hayes about to remove it gently... ?

Then it doesnt say anything about to remove the halves?..

(Im from sweden, so i might talk like Yoda to you guys btw)

Smoothie

Smoothie · Posted: Fri Apr 14, 2006 3:29 am Post subject:

Could the mixture be so rich that fuel's getting into the oil? It's normal for some oil to be in the air cleaner...
_________________
"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

AndreasNystrom · Joined: 09 Jan 2006 Posts: 15

No, its dropping from the plunger and down... thats what i saw when i removed it anyway so I guess thats why.

Its probably not a high precision anymore, since the fit isnt that good... :/
thats why i thought it would be a o-ring there.

Is there any leak at all when its better? or is it normal with drops under?

moone924 · Joined: 05 Feb 2003 Posts: 868 Location: Douglas Wyoming

you should probably look for a good used distro from someone
_________________
Ryan Moone

Always shopping for a nice s2 931 to baby.
New philosophy : one car project at a time.

AndreasNystrom · Joined: 09 Jan 2006 Posts: 15

Thanks for the answers!. Actually i will probably try to do a new plunger with better fit...

Another question.. the co-adjustment screw, is there any standardsetting for it?.. like screw it in, and then 2rounds out?

Smoothie · Posted: Sat Apr 15, 2006 11:01 pm Post subject:

There is a rough starting point, but you still need to fine-tune it with a CO tester or other technique later.
For the mixture approx. starting setting, you turn the screw out, jumper the fuel pump, then turn the mix screw in just to the point where fuel starts to flow, then back it off 1/2 turn. (This is done with the metering plate at zero position and without exerting any pressure on the screw that would move it from zero.) That's the rough setting - 1/2 turn out from where fuel starts to flow.

From the Haynes manual - "Be careful not to scratch the bore or piston since these are mated on assembly and a new piston means a new distributor body."
_________________
"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

AndreasNystrom · Joined: 09 Jan 2006 Posts: 15

so how do i know when the fuel flows? i need to take off the fuellines to the injectors?

Smoothie · Posted: Sat Apr 15, 2006 11:10 pm Post subject:

No. Listen closely to the fuel distributor. You should hear the fuel flowing when it starts.
_________________
"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

AndreasNystrom · Joined: 09 Jan 2006 Posts: 15

thanks for all the help

I will try this out! *thumbs up*

edit : and yes, i have a accsess to a fuelmeter so i can check CO.
it was over 10 the last time :/