KPUT KSB

[cougar]

Any one know where I can get a KSB? Mine has gone South for the winter.

[dieseljack]

Somewhere on here it tells you how to hotwire it or something like that

[Begle1]

How do you know it's broken?

A Bosch distributer/ pump shop could probably get you the part, it'd probably be cheaper to buy a whole pump off eBay. I kinda doubt that the KSB differed between applications.


However, it's not like you really need the thing anyways.

[Ace]

I would make sure it's not the air temp sensor or the wiring between it and the KSB and the PCM before I went looking for a KSB. You can test the KSB itself by just hot wiring it. Clip on to it and then stand there and clip the other end to the battery and you'll be able to hear the engine note change with timing advance at cold idle if it's working.

[cougar]

Electrically everything works as advertised. The plunger on the wax motor doesn't move. The truck is about to spend another winter as yard art if I can't get another one.
FYI. The intercooled and non intercooled KSB's work opposite of each other.
My 91 is intercooled.

[Mark Nixon]

Do you need the WHOLE assembly that bolts to the side of the pump, or just the solenoid piece at the top of it?
I guess I'm asking if your solenoid part good?

I may have an assembly, but the electrical part is bad.

Mark.

[TWorline]

If Mark can't hook you up PM BGilbert I know he has one.

[Richie O]

I know the non and cooled trucks are different ( non needs power all the time and cooled only needs power to activate ) but I thought it was the non i/c trucks with the wax activator??? My 93 is instant if you apply power to it and the 89 takes a couple of minutes to change the timing ( as it takes a couple mins to heat the wax ).

[Mark Nixon]

Okay, my ignorance of these things shines through.

Where is the "wax" located in the KSB?

Mine is likely gong to junk, as it's on a burned engine.
It JUST got the electrical connection, but if there's wax anywhere else, it's FUBAR, because I think it may have been hot enough to burn wax.

I was going to pull it the I/P off to-day or to-morrow and see what remains.
In any event, the pump is parts.

Mark.

[cougar]

It might be that my 91 book only covers non intercooled and not the later intercooled versions. Im not sure what is really going in on with the truck. I spent the day shifting some parts between my two and it made no difference on the start up. Everything seems to be normal except it is having trouble with starting. It takes a lot of throttle to get it to catch and when it does there is a lot of dark blue smoke that clears up quick as the engine smooths out. You need to hold the throttle or it will die until warm. But it runs smoothly during the warm up. Absolutely no other indications of an issue.
Any Ideas??

[IowaCummins]

just manually advance the timing by rotating the pump 1/8th inch. my truck was at stock timing and it sucked to start. and when it did i would have to idle up for 10 min with huge amounts of white smoke. i advanced it 1/8th inch and bam awesoem starts barely any white smoke after started. milage went up quite abit cause im not letting all that fuel go out the exhaust anymore and actually builds heat by the time i get to school.

[MMeier]

Someone reeducate me on how this thing works on a '93 again .

[PToombs]

Intercooled engines- when the engine is cold, the switch on the intake feeds power to the KSB which advances timing about 7* and increases case pressure. When it warms up, the switch opens, letting the piston in the KSB return to the normal timing position.

Non-IC- when cold, NO power to the KSB, so timing is advanced. When it warms up, the switch on the manifold closes and a wax pellet in the KSB is heated. This expands and pushes the timing piston, which retards timing.

[MMeier]

Any idea at what temp it kicks in ?

[cougar]

Supposed to be something like 59°. Thing is it was working up until last winter. Then I thought my fuel had jelled but it hadn't.