Crank/ cam position sensors

[petersonj]

I did unhook the connector and had ground and power but I’m wondering if I could be getting intermittent power supply or ground ?

Did YOU supply a separate power and ground to Pins #7 and #6 respectively to the PSG? It may be that you did, but I can't tell from your statement.

- John

 

[SAndreasen]

Did YOU supply a separate power and ground to Pins #7 and #6 respectively to the PSG? It may be that you did, but I can't tell from your statement.

- John

no I haven’t yet but that’s the next step if there’s power and ground to the pump side of plug then there is power and ground unless the connector pins aren’t making contact which I have seen in other applications a few times .

 

[petersonj]

if there’s power and ground to the pump side of plug then there is power and ground unless the connector pins aren’t making contact which I have seen in other applications a few times .

Step #3 (Blue Chip Diesel) is the most important test for you to do right now. This step eliminates any potential electrical problems prior to the PSG connector including the ECM and all related wiring and control circuitry. It also eliminates possible voltage being applied to Pin #5 in the PSG (mentioned in Step #2) which would shut down the VP44.

Should you decide to perform this test, the engine may still be difficult to start because the injectors may not be fully bled. I would make sure that you make temporary power and ground connections that will be reliable while the engine is cranking.

- John

 

[petersonj]

Double Post.

 

[SAndreasen]

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

I can not see well enough to hook up a power supply direct to the pump and I’m not going to go probing around pins with the power probe . There is 12 volts and ground to the pump side of the connector and also no power to the wire purple I think it is can’t remember now . checked it all that’s how I determined the original pump was bad . And no it’s not completely impossible for connector to not have a connection with the pump but the pins on both look fine and not distorted so I think that’s a stretch but still not impossible

 

[SAndreasen]

Does anyone offer a new harness for the injection pump?