[Diy_efi] Re: Diy_efi Digest, Vol 9, Issue 11

[Bill Washington]

All the diesels  have owned had a cold start mechanism which adjusted the 
injection advance and throttle. If this has seized up as they often seem to do 
and then the engine adjusted for the correct cold start idle, as the engine 
warms up the cold start mechanism cannot back off the throttle and advance to 
maintain that idle rpm, therefore it will rise to ~1200rpm .... moral of the 
story, check the cold start mechanism - if it is a mechanical injection - Bosch, 
Roto Diesel, lucau, or any of the many clones of these systems, there is likely 
to be a bowden cable coming from the injection pump, and disappearing into the 
head of the engine .... they normally seize in the head, and most people just 
ignore them, thereafter....

Bill
> 
> Whats puzzling me more at the moment is why its running fast at idle. 
> The throttles at minimum, right on the endstop, and after a start it 
> idles at the right speed (~900 rpm). a couple minutes later, though, and 
> tis idling at ~1200 rpm. the vacuum actuators on the IP arent the cause, 
> they arent doing anything at idle anyhow.
> 
> Anyhow, this is now wildly off topic for this list, so I'll shut up now :)
> 
> 
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> End of Diy_efi Digest, Vol 9, Issue 11
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>