How does the cold start solinoid work?

[RSchwarzli]

We have a cold start thingy ( :-laf ) on the side of the VE. How does it work? What is it actually doing? Is it tied into the grid heater circuit as the signal that it needs to activate?



Thanks! Just nosey!



Robert

 

[DVolk]

It advances the timing when its cold until the engine reaches a miniumum of 160degrees

if you put a jumpwire to that when its running it will bump the idle up a littel if its cold

 

[RSchwarzli]

While we are on the subjct, where is the sensor for the grid heater engagement? It is dang accurate. 49 F it cycles the grid heater. 50 F it does not!

 

[RSchwarzli]

It advances the timing when its cold until the engine reaches a miniumum of 160degrees

if you put a jumpwire to that when its running it will bump the idle up a littel if its cold

Thanks for the reply.



I know it advances the timing, but how? Does it clock the pump internals?

 

[GHarman]

KSB Threads

BSchwarzli, Did a little search for you. I had the KSB leak on my old 91. 5 so I had to replace some o-rings. My thread on the KSB has an exploded view drawing and parts list incase you might need to tear into one (this parts list is for the 91. 5, I do not know if they are the same as that on a 93 VE pump) GregH



https://www.turbodieselregister.com/forums/search.php?searchid=1503665

 

[Paychk]

Linky no work



May be this one:



https://www.turbodieselregister.com...ram-forum-1989-1993/184307-ksb-fuel-leak.html

 

[GHarman]

I hate it whan it does that!

Yep, Thats the one:-laf! GregH

 

[JLEONARD]

where is the sensor for the grid heater engagement

Driver's side into the intake, just under the intake horn. There is a hole in the bracket for access.

 

[Bob Beauchaine]

My understanding of the KSB is that it advances the timming 5 degrees until the engine temp reaches 100 degrees.



Bob

 

[RSchwarzli]

where is the sensor for the grid heater engagement

Driver's side into the intake, just under the intake horn. There is a hole in the bracket for access.

Ahhhh. Yes. I know the one you are talking about!



So why does the block heater make that not engage when it is plugged in? It just runs off the sensor no?

 

[RSchwarzli]

BSchwarzli, Did a little search for you. I had the KSB leak on my old 91. 5 so I had to replace some o-rings. My thread on the KSB has an exploded view drawing and parts list incase you might need to tear into one (this parts list is for the 91. 5, I do not know if they are the same as that on a 93 VE pump) GregH



https://www.turbodieselregister.com/forums/search.php?searchid=1503665

Linky no work



May be this one:



https://www.turbodieselregister.com...ram-forum-1989-1993/184307-ksb-fuel-leak.html

My understanding of the KSB is that it advances the timming 5 degrees until the engine temp reaches 100 degrees.



Bob

Thanks for the info and links! That answers all my questions but one.



Is the pump actually advanced by 5 deg, or is the fuel injection cycle advanced by 5 deg? I would have to assume as it is not electronic injection like a HPCR, it must be the pump advance but how? It is attached by gears.



Then again maybe it is just so simple that I have made it complicated in my head and you guys already answered it!

 

[cerberusiam]

The VE uses a dynamic advance on the fuel distibution rotor that advances the a slot that distributes the fuel to the head. Rotate the plate towards the direction of rotation and the injection event advances. Its all done internal to the pump with a rotating plate to deliver the fuel. Answer to your question is it doesn't advance the pump only the timing of the fuel delivery to the injectors.



The KSB routes extra pressure to a cylinder on the fuel distibution rotor that advances it when cold.

 

[Paychk]

Kinda like this:

https://www.turbodieselregister.com/user_gallery/displayimage.php?&photoid=3741&width=4

 

[RSchwarzli]

The VE uses a dynamic advance on the fuel distibution rotor that advances the a slot that distributes the fuel to the head. Rotate the plate towards the direction of rotation and the injection event advances. Its all done internal to the pump with a rotating plate to deliver the fuel. Answer to your question is it doesn't advance the pump only the timing of the fuel delivery to the injectors.



The KSB routes extra pressure to a cylinder on the fuel distibution rotor that advances it when cold.

Sweet! Oo. Thanks for the detailed info!

Kinda like this:



https://www.turbodieselregister.com/user_gallery/displayimage.php?&photoid=3741&width=4

OOOOOH! The mother of all pictures! Oo. Thanks!