txhokie4life

'82 Euro CIS

I've been fighting some issues with my CIS.

The other day I was adjusting my CIS Fuel Distributor Adjust Pin,
The spring relief 4mm? adjustment screw/pin

I was trying to determine where I was since I had messed with it prior
but was having other issues. I think I resolved those issues but
now as I adjusted all the way CCW, then all the way CW.

I never seemed to reach the end of the CW (I've done that before).
Now when I try to do any adjustment -- I'm not feeling any resistance,
like something has come loose or broken.

Before I pull it all apart (yikes), anyone have any idea what I am going to find?

thanks,

Mike

Jadz928

CCW has a 'stop' because you are screwing into a thread (righty-tighty).
CW hasn't a 'stop' and the adjustment barrel can 'unthread'... this is probably what happened.
If the adjuster hasn't fallen in, you may be able to restart the thread (CW).
Good luck!

For reference, a safe # of turns from full CW is 32.

9two8

Don,t know if you have seen this, or not,.. may or may not help, hope it,s the former, lot,s of links re CIS system.

http://928classics.com/4/post/2014/0...ide-78-79.html

Ken
80 928 S
5 Speed

UK

txhokie4life

Thanks JADZ,

I'm going to guess that is what happened -- if I can't get it to restart,
I assume disassembly will be required -- how far apart will I need to go?

thanks,

Mike

GlenL

Just for all other people with a fussy CIS:

You can not fix a poor running CIS system by adjusting it. Once it's clean, moving freely and the fuel pump is supplying enough pressure you can tune it for performance.

txhokie4life

A quick history: (okay maybe not that quick)

I had a very rich running car. Had it running "ok" but not great. Did note if I had the mixture
not set right -- it would not run -- I couldn't remember if that I could kill idle and then it would
not start unless a 1/2 turned the mixture back.

My main issue at the time was having to adjust my WUR to drop the control pressure.

Anyway, I had it at a body shop for an extended period of time (they were slow).
6 months after dropping it off with them I call them up to check on it and they tell
me it wouldn't start.

I had never had a no start issue -- So I run out there, try a few things including disassembling
and reassembling the WUR to no avail.

I give up -- flatbed the car to my friends shop -- but it sat all summer.

Assumed at this point it was the Fuel Pump. Finally get ready to attack that and
I thought I would give it a go replacing the FP. However I try to start
it, fired up and ran like crap -- rich as rich can be, but it idled for 10 minutes
and would re-start fine. Go figure.

But I also had a leak at the thermostat -- a helicoil was done poorly (by me)
and needed to be redone -- but I didn't have my helicoil tools with me.

A few days later, I pull the WUR, fix the thermostat, reassemble.
Wouldn't run.

That's when I went around and tried the mixture adjustment, but wanted to reset it
to the middle and start again.

Subsequently, I found I had reassembled my WUR incorrectly and have fixed that.

I also think the gas is bad as we had reasonable control pressure, but couldn't get it to fire
(yes there is spark).
We pulled the plugs -- dried out the cylinders and got it to cough, but not run.

pulled the plugs again -- and its flooded again.

Drained the gas, aired cylinders out again -- will dump the oil as well.

Tonite I was going to put new gas in it and try my luck.

But that gets me back to getting my mixture screw operating again.

Mike

AirtekHVAC

It's not as bad as you think....I had mine off multiple times learning to rebuild...so my fuel lines were loose...I did the same thing...just unbolted the FD and pulled it up, then removed the 2screws holding the adjuster, pulled it off, and the screw was right below...in my case, adjusted too far down, and was unable get it to come back up. A few turns with the Allen key, and it raised up. Then reassembled...only took about 15 min.

txhokie4life

Attacked tonight

Had to loosen the FD pulled 4 lines off the FD.

Looked like a combo of the adj pin wear and the internal pin too low.

Cleaned out the internal pin, adj it up a bit and reassembled.

Still have issues. Need to get my WUR rebuilt. Control pressure too high and not reacting to wur pin height

Will order that in AM

Thx for help,

M

jwillman

Mike,

I don't remember from the other thread if you had the WUR apart?

I had high control pressure and the pin was tapped about an 1/8/ below the base of the WUR.

I took WUR apart, it looked very good inside, tapper the pin out about 3/8 inch above top of WUR and reassembled. Still high pressure and pin adjustment had no effect.

I took it apart again and this time replaced the o ring under the pressure plate (first pic shows plate and 4 screws, second pic shows o ring with no o ring installed) held on by 4 screws that the large spring rests on.

Once that was replaced and WUR reassembled I was able to tap in the adjusting post to lower control pressure into range - note - very sensitive a small tap goes a long way.

I have some of the o rings left over and can drop one into an envelope or get it to you. Let me know.