[Diy_efi] Re: Diy_efi Digest, Vol 9, Issue 13

[Bill Washington]

Ian,
	The cold start mechanism on my diesels is mechanical, ie a cable to a lever on 
the side of the pump - that lever controls a mechanical advance in the IP - I 
have now seen this on Bosch, Roto-diesel and Lucas Diesel injection pumps. the 
same function could be done electronically, and probably was on some the 
generation after mine ... and then.... in the new common rail diesels its all 
done in a computer and the injectors have changed to electronic and the IP is 
simply a 'very' high pressure delivery system.

	I would check the resistance of your temp sensor(s) hot and cold  and compare 
them the the manufacturer's spec.

Regards
Bill
> 
> 
> Ok, more data points...
> 
> This IP attaches to the engine by means of a belt and three injector 
> pipes. the pump body is fixed in place and doesnt rorate or anything 
> clever to achieve advance.
> 
> If it does do any form of advance I cant see how. there is no direct 
> mechanical sensor connected to the engine.
> 
> There are a three wires attached. two are the RPM sensor. I *think* this 
> is the cutoff relay.
> 
> All the temp sensors appear to be functional (although now Im wondering 
> what the third one is for... hmm.)
> 
> (just been out and checked - 3rd sensor makes no difference to the idle 
> speed.)
> 
> This IP is from my previous engine - which DID idle properly at 900 RPM.
> 
> I tried crimping the hose from the boost compensator, but no change.
> 
> 
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