Heres some good links that explain the KE system:

www.auto-solve.com/mech_inj.htm
www.volvoclub.org.uk/k_jetronic3.htm
www.users.bigpond.com/INTERJECT/KJETRON.HTM

I finally took mine apart. It was very clean inside but I did find one bad o-ring. I doubt it was the cause of my misery but it needs replacing anyway. For anyone about to tackle taking a FD apart, I suggest you take pictures as you go. While not the most complex gizmo I've ever seen, it does have quite a few parts. Being unfamiliar with it could cause some headscratching during reassembly.

Attached Thumbnails

 

Was the bad o-ring a cause of your problem/s?
Thanks
David

__________________
_____________________________________________

2000 Honda Accord V6 137k miles

1972 300SEL 4.5 98k miles

_____________________________________________

If one of the 'O-rings' on the central plunger does not seal , fuel intended for that cylinder leaks into the intake manifold, resulting in a lean cylinder and overall rich mixture condition.

Very precise adjustment of the springs in the top half--under each fuel line connection- is what balances the flow distribution. The equipment needed to properly make this adjustment is very expensive and not usually found anywhere except at special overhaul shops.

The central plunger is what determines the total fuel flow.

If the main diaphgrahm cracks it also leaks fuel into the intake manifold and results in a rich mixture.

MTBE in gasoline is not kind to the 'rubber' parts.

These parts are not designed to be serviced internally. i would hate to see a bunch of you spending the next year or two filling these pages with questions how to make your car run right again after such an adventure.

My guess is that no more than a few distributers ever get put back together with the original design criteria intact. That diagphram is stretched by the spring underneath and thoroughly resists returning to its exact position. The diagphram plays a central part in the action of the differential pressure valves (the six holes with springs are part of the diff press valves). The diaphram has to be exactly in its original position or the spring rate will change between valves, just one of the smaller more long term problems.

As far as I'm concerned this is the simplest fuel distribution system man ever created (for a multi cylinder engine). If you obey a few rules they are a piece of cake. My first rule is don't waste time taking it apart. I have doe it for fun and to try and fix my own stuff. All I ever accomplished was wasting time and a little education. The best I have ever done was to put one back together and have it run. I have never fixed a problem inside.

I hope I don't get too involved trying to help someone test a car that has had its distributer apart. So if you do this please include it in the data of your following posts as to your problems

__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician