Diesel cold start 'choke'

[Bugsy_malone 666]

now im back from vanfest im looking at putting my bus back to diesel ( need a starter motor still mind)

while I now have a sump to go TD i think i need to go back to just normal diesel for the time being as I cant keep spending so much on my conversion, i need to get it plain reliable and easy.

something I did discover is on the fuel pump on my 1600 diesel is it has like a small arm on the inside of the pump next to the block, i presume this is a cold start 'choke'?

if this is the case, how does it operate? is it just a case of a sprung loaded cable type solinoid so that when you turn on the ignition you can turn on the choke, start then turn it totally off?

then its also time to work on my cooling system get it all running again.
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Doing Thing Differently.

[Regis]

I have a diesel jetta with the 1.6 turbo diesel . There is a knob that you pull out to the left of the steering wheel to move the arm on the pump. You can pull it out a little or all the way depending on the engine temp and outside air temp. The lever actually advances the fuel pump timing a few degrees for easier starting.
Some sort of ridgid choke cable would work, but it will have to be pretty long to use in a van. Sort of like the cables that move the heater controls in a lot of cars.

[Bugsy_malone 666]

ah so thats how it works.

i know on our old tractor you have like a push button enrichment thing on the fuel pump you press in when you start it and i just presumed it worked something like that, i didnt realise it adjusted the pump timing.

I might have to rig up a servo control for it then as i have a few spare sections of wire going front to rear on the van, running a choke cable could be a right pain in the arse though!
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Second Gear All The Way Baby!

Doing Thing Differently.

[Bugsy_malone 666]

Well I got some servos arrived today, just waiting for the small controller.

I started looking at the mechanism on the fuel pump and I attached an aluminium rod to it to see how it would opperate in practice, what i did notice is the fact that the lever was sat in the 'choke on' position (lever on dash pulled out) meaning it was in start mode!

so now the question is what might that have done, the engines been running with changed timing for 1000 miles odd?

could it be that it will actually start better with the lever off?

could it damage the fuel pump?
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Second Gear All The Way Baby!

Doing Thing Differently.

[Norway]

As far as i know it is not verry dangerous for the engine..... the engine runns abit "harder" with the cold start on.
You might experience a bit lower fuel consumption....
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Subsyncro =)

[madmatt]

the cold start only advances at low rpm after that the internal pump pressure operates the timing as normal.later motors had a factory fitted solinoid that is operatered via a temp switch on the water system.