IPR Sending unit question???
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Posting Guru
Joined: Feb 2007
Posts: 1,327
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From: Las Vegas, NV
IPR Sending unit question???
On the IPR there is a sleeve held in place with a cheap nut and two wires for the electrical connection. My question is how does this this sleeve pick up the signal or amount of pressure? I only ask because mine fell off. Apparently the nut came loose and the sleeve was dangling by the wires. I am wondering if this is what has been causing my truck to stall out when doing a hole shot. I just did the Hutch Mod and installed a mechanical fuel guage and am getting 60 PSI, so Im guessing my fuel pump is O.K. (or not?) I don't know. Still stalling on a hole shot. Next I will be rebuilding the fuel bowl with deisel O rings new billet FPR housing. Im just throwing money at parts at this point.
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
You believe the IPR is a sensor. It's not.
The wires just go to an electro-magnetic coil. When current is applied, the resultant magnetism will cause a small plunger to move, moving the position of a poppet valve that allows the high-pressure oil to re-circulate back into the pump, thus controlling the pressure.
That current is supplied by the PCM, which senses the pressure on the driver's head high-pressure oil gallery. It also knows RPM, throttle position, and a host of other things with which it calculates the HPOP pressure necessary to fire the correct amount of fuel to meet the engine's power demands.
Pop
The wires just go to an electro-magnetic coil. When current is applied, the resultant magnetism will cause a small plunger to move, moving the position of a poppet valve that allows the high-pressure oil to re-circulate back into the pump, thus controlling the pressure.
That current is supplied by the PCM, which senses the pressure on the driver's head high-pressure oil gallery. It also knows RPM, throttle position, and a host of other things with which it calculates the HPOP pressure necessary to fire the correct amount of fuel to meet the engine's power demands.
Pop
Thread Starter
|
Posting Guru
Joined: Feb 2007
Posts: 1,327
Likes: 2
From: Las Vegas, NV
You believe the IPR is a sensor. It's not.
The wires just go to an electro-magnetic coil. When current is applied, the resultant magnetism will cause a small plunger to move, moving the position of a poppet valve that allows the high-pressure oil to re-circulate back into the pump, thus controlling the pressure.
That current is supplied by the PCM, which senses the pressure on the driver's head high-pressure oil gallery. It also knows RPM, throttle position, and a host of other things with which it calculates the HPOP pressure necessary to fire the correct amount of fuel to meet the engine's power demands.
Pop
The wires just go to an electro-magnetic coil. When current is applied, the resultant magnetism will cause a small plunger to move, moving the position of a poppet valve that allows the high-pressure oil to re-circulate back into the pump, thus controlling the pressure.
That current is supplied by the PCM, which senses the pressure on the driver's head high-pressure oil gallery. It also knows RPM, throttle position, and a host of other things with which it calculates the HPOP pressure necessary to fire the correct amount of fuel to meet the engine's power demands.
Pop
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
Without an active IPR, your injectors are not spitting the right amount of fuel each shot for the conditions.
So the only answer I can offer is, "Could be".
I know, that's not very definitive....
Pop
So the only answer I can offer is, "Could be".
I know, that's not very definitive....
Pop
Senior User
Joined: May 2010
Posts: 178
Likes: 0
From: Spring Valley, CA
If the IPR is not operating correctly your truck will run like crap, sometimes no start and sometimes intermittent or erratic behavior. A loose nut (besides the one at the wheel 
) on the IPR coil can certainly cause problems.
) on the IPR coil can certainly cause problems.
Lead Driver
Joined: Jan 2007
Posts: 6,708
Likes: 5
From: Kiowa CO
You believe the IPR is a sensor. It's not.
The wires just go to an electro-magnetic coil. When current is applied, the resultant magnetism will cause a small plunger to move, moving the position of a poppet valve that allows the high-pressure oil to re-circulate back into the pump, thus controlling the pressure.
That current is supplied by the PCM, which senses the pressure on the driver's head high-pressure oil gallery. It also knows RPM, throttle position, and a host of other things with which it calculates the HPOP pressure necessary to fire the correct amount of fuel to meet the engine's power demands.
Pop
The wires just go to an electro-magnetic coil. When current is applied, the resultant magnetism will cause a small plunger to move, moving the position of a poppet valve that allows the high-pressure oil to re-circulate back into the pump, thus controlling the pressure.
That current is supplied by the PCM, which senses the pressure on the driver's head high-pressure oil gallery. It also knows RPM, throttle position, and a host of other things with which it calculates the HPOP pressure necessary to fire the correct amount of fuel to meet the engine's power demands.
Pop
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Thread Starter
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Posting Guru
Joined: Feb 2007
Posts: 1,327
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From: Las Vegas, NV
So Pops is right, and my problem is finally solved. The most amazing thing is I made it all the way home from CO, a good 800 miles, towing my 5er. I guess on one hand lucky, on the other hand just shows how reliable and bullet proof these trucks really are. The big question was any damage done that I don't know about, like injector damage for example.
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