fuel problem

I have tried to start  my golf without  much success. The startup injector works and produces a  good spray of fuel, stopping after 5 secs or so.
However I have taken No 1 injector out and there is no fuel coming out of the injector. Like wise if I take the injector off and put the pipe in a jar, I get nothing from the pipe which is clear.  All done with the starter motor running of course. I shall have to get another injector off I guess to check them all eventually. I was trying to avoid pulling the injectors as they are a real pain to get out, even with a tool I have made for the job. Should I be looking at problems with the fuel distributor or something else?

Use a piece of wire to temporarily short the fuse box connections were the two large copper connectors fit on the fuel pump relay so that the fuel pump runs with the ign on.

Lifting the round plate in the metering head (use a magnet) should send petrol to the injectors

best to remove lines to the injectors or even better the injectors if doing tis for any length of time or you will fill the cylinder bores with petrol

I shall try that and report back

More than likely metering head plate is 'stuck'.

Do not pry the metering head, use a magnet to move it.

I do like the stuck metering head plate suggestion.

a) it would be an easy fix and
b) the vehicle was sitting outside in a field for 7 years before I bought it as a project so anything could be stuck.

I'll certainly have a look at that first thanks.

It's pretty manky in there
However with a magnet on the centre bolt it moves up and down freely and seems to be concentric with the venturi, so I'm hesitant to fiddle with it. I might try a gentle vacuuming of the venturi tho'

You seem mechanically minded and I think you'll probably get your head around Kjet relatively easily, but I'd caution against starting to fiddle / dismantle parts of it until you're at that stage.

This is a contradiction, but as a system it's both very simple / robust, while at the same time aspects of it can be complicated / easily damaged.

Break something and it can be very expensive / time consuming to find and replace (if at all).

Quite a few old school sites scattered about when you search and well worth a read first.

Just a random one to start you - https://tasteslikepetrol.net/2020/02/bosch-k-jetronic-basics/
 

golfy1 said

It's pretty manky in there
However with a magnet on the centre bolt it moves up and down freely and seems to be concentric with the venturi, so I'm hesitant to fiddle with it. I might try a gentle vacuuming of the venturi tho'

Post some pics, how do you mean manky? has some wildlife been in residence? Has it drawn stuff into the inlet manifold/engine?

Is fuel getting to the injectors by running the pump and lifting the metering flap?

I've tried to post picture, but it's not working for some reason. I find picture posting on this site a bit flaky at the best of times

think components inside the meterhead can still be stuck even if the flap moves (either when starting or manually)

if you run the pump and lift the flap do the injectors work?

Short answer is: No

Should be a tad bit cleaner which would make me thing the plunger is sticky a wee bit.

As usually I see them bright and shiny.

I've rattled the flap up and down a good few times and the injector I have got out, sprays fuel out when I link the two large blades in the fuel pump relay socket. However when I replace  the fuel pump relay it runs momentarily, as though once the starting jet fuel is used up all goes quiet.

I'll try  leaving out the fuel pump relay and just join the two large blades in the relay socket. Could be the problem with the ignition switch has come back. I'll do some more fettling tomorrow