7.3 No start

[silverpsd_06]

Fuses are all good cranked for several minutes with the hpo lines plugged from the pump will still only build 210-230psi

 

[Arisley]

With a new pump and IPR?

 

[silverpsd_06]

Yep nothing changes with it new ipr and pump it built a little more pressure but still not enough to fire

 

[Magnum PD]

Buzz test rules out bad PCM and IDM correct?

 

[silverpsd_06]

Correct.. What are the odds of a bad ground or a open circuit. The only thing I've ever heard of similar to this was Charles red truck where the ipr just decided to do its own ***n thing rather than what was commanded, iirc he never figured it out either

 

[Magnum PD]

Check the ground connection at engine block.

 

[silverpsd_06]

Got any pictures of where to look or a general location? I know the one that jumps from body to frame on the passenger side is pretty well hosed

 

[Magnum PD]

There is one on both sides of the block beside the harmonic balancer.

 

[silverpsd_06]

I'll check it out.. What do you think the odds are that the ipr wires may be chafed on down the line? Truck only has 46k but 3000 hours on it.. Spent most of its life with a crane and boxes on it

 

[Magnum PD]

See if any ground out.

 

[Magnum PD]

May help.

http://www.powerstroke.org/forum/94...ssion/31351-97-powersroke-wiring-diagram.html

 

[Arisley]

Stick an volt meter across the IPR wires, see if the voltage varies.

You did replace the little electromagnet on the IPR also, correct?

 

[silverpsd_06]

Yes replaced the entire IPR ill try the ground tomorrow and check for voltage.

 

[Magnum PD]

Good luck.

 

[Justin@DP-Tuner]

This may sound dumb, but I have seen it before... Are you sure you do not have the IPR wiring harness connected to the EBPV solenoid and the EBPV solenoid harness connected to the IPR? They are the same connector.

 

[silverpsd_06]

You mean the icp connected to the ebpv no they are not interchanged I never disconnected the ebpv

 

[Magnum PD]

They are similar.

 

[lincolnlocker]

what about fuel bowl plug and ipr plug? I think they are close to the same.

live life full throttle

 

[silverpsd_06]

I took the whole harness off the fuel bowl, fuel heater ect.. Never touched the ebpv. As far as I can tell with the schematic that was posted up power to everything in that area is the red wire, the red/yellow stripe is the voltage signal from the PCM as to what percentage the IPR closes. To me the problem lies somewhere along that wire either it's rubbed through or has a bad connection at the PCM

 

[Justin@DP-Tuner]

You mean the icp connected to the ebpv no they are not interchanged I never disconnected the ebpv

No, not ICP. The IPR connector is the same as the EBPV.

EBPV

IPR

Just wanted to make sure, as no one really thinks to check that and it has been done before.