Crank/ cam position sensors

[Ozymandias]

Then it must be the pump itself as I have sent you the information above, for the start sequence all the VP44 needs is Positive and Negative. Nothing more is involved, everything else comes afterwards when the minimum idle rpm is reached.

 

[SAndreasen]

Then it must be the pump itself as I have sent you the information above, for the start sequence all the VP44 needs is Positive and Negative. Nothing more is involved, everything else comes afterwards when the minimum idle rpm is reached.

I have checked for power and ground at the pump connector that’s how I determined the original pump was bad . Now I guess we’ll see how well thoroughbred diesel stands behind their pumps .

 

[SAndreasen]

Finally had some help today and I have no fuel the cylinders number 123 but I have fuel to 456

 

[Ozymandias]

Now it runs on 3 cylinders?

 

[SAndreasen]

Now it runs on 3 cylinders?

Doesn’t run at all

 

[Ozymandias]

Gotcha

 

[SAndreasen]

Gotcha

Waiting now on the company who sold it

 

[petersonj]

I would be interested in what Thoroughbred Diesel has to say.

Do you know if the VP44 that you bought was tested on the Bosch test stand. I believe that Thoroughbred Diesel sells a two-year warranty VP44 that is tested for 4 hours on the infamous Bosch 815 test stand. Not sure whether or not their one-year warranty pumps are tested.

- John

 

[SAndreasen]

I would be interested in what Thoroughbred Diesel has to say.

Do you know if the VP44 that you bought was tested on the Bosch test stand. I believe that Thoroughbred Diesel sells a two-year warranty VP44 that is tested for 4 hours on the infamous Bosch 815 test stand. Not sure whether or not their one-year warranty pumps are tested.

- John

I can’t imagine they wouldn’t run it ? I’ve bought a pump from them one other time

 

[SAndreasen]

Still nothing from thoroughbred or blue chip wrote them both to see if anyone can tell me what might be going on with the pump . I guess I’ll probably end up buying another one and the boss can deal with it through his credit card company . I’ve got one of these pumps a friend tore apart because he saw you can buy a seal kit for 50$ I’ll have to study it and see just how it works or get an idea anyway

 

[BigPapa]

It was a holiday weekend. They probably haven’t gotten to your email yet.

 

[SAndreasen]

It was a holiday weekend. They probably haven’t gotten to your email yet.

I have a spare ecm that I think I’m going to swap and see what happens. Debating replacing the crank position sensor as well

 

[SAndreasen]

Finally got a call about the pump well I didn’t but the boss did I’ll try to call tomorrow it will be interesting to see what they think the cause of the problem is

 

[SAndreasen]

More questions than answers. How do I check to see if the security system is causing a no start ?

 

[Ozymandias]

Does your truck even have an anti theft system?
My buddies 98.5 SLT came without, which I thought was standard.

 

[petersonj]

Before I condemned any component, I would perform Step #2 and Step #3 from the Blue Chip diesel site below. Just be very diligent when performing the tests. The test results should be conclusive.

https://www.bluechipdiesel.com/runningtests

- John

 

[SAndreasen]

Does your truck even have an anti theft system?
My buddies 98.5 SLT came without, which I thought was standard.

this is a sport model so it may have ??

 

[SAndreasen]

Before I condemned any component, I would perform Step #2 and Step #3 from the Blue Chip diesel site below. Just be very diligent when performing the tests. The test results should be conclusive.

https://www.bluechipdiesel.com/runningtests

- John

Thanks I’ve ran those tests and I do have power and ground to the pins specified . Will it hurt anything to put the power probe to that wire and hit it with power ?

 

[petersonj]

You should perform Test #3 with the wiring harness disconnected from the PSG so that all possible electrical problems will be eliminated.

Supply power to Pin #7 on the PSG (using a 10 amp fuse) and supply a ground to Pin #6 on the PSG.

- John

 

[SAndreasen]

You should perform Test #3 with the wiring harness disconnected from the PSG so that all possible electrical problems will be eliminated.

Supply power to Pin #7 on the PSG (using a 10 amp fuse) and supply a ground to Pin #6 on the PSG.

- John

View attachment 140782

I did unhook the connector and had ground and power but I’m wondering if I could be getting intermittent power supply or ground ? Truck tries to fire every few revolutions but then acts like no fuel supply at all for a few revolutions, That’s why I’m wondering if it might be ecm related ? The guy from thoroughbred said the ecm has to mounted to the engine or it will fry it so Monday I’m going to swap them out just to see what happens