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Old March 20th, 2012, 01:38 PM   #21
ThinICE
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I second the ďhuh?Ē Did you bump your own question thread? Get Autozone to scan the DTC out of the ECM. DTCs on old trucks usually tell more than the modern day 4-wheel computers.

The base oil pressure shows no indication of the high pressure side. I guess if your low oil pressure is way below spec. you could rob your high pressure oil pump and cause this issue, but it would unlikely show up on the gauge.

Fuel pressure should be 45 PSI at the head. If itís low, fuel filters first, then run a separate fuel line from the fuel pump inlet into a 5 gallon plastic fuel tank. This eliminates restrictions on the fuel tank pick up which happens on 7.3Ls.

I saw "low power and runs rough when hot" and that could be a leak from the high pressure oil system. Hot oil is low viscosity which finds the leaks easier. Verify the ICP sensor is not damaged or contaminated with oil, which equals new sensor and pigtail. If thatís okay, it could mean the injector o-rings are leaking or the high pressure oil pump is garbage, especially after IPR replacement.
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Old March 21st, 2012, 06:55 PM   #22
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if you're talking about an exhaust system sensor, the only thing i can think of on a 7.3 would be an EBP(exhaust back pressure sensor). the tube that they're on is known for plugging and reading inaccurate readings, or the tube itself may be rotted out.
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Old March 22nd, 2012, 07:57 AM   #23
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if you're talking about an exhaust system sensor, the only thing i can think of on a 7.3 would be an EBP(exhaust back pressure sensor). the tube that they're on is known for plugging and reading inaccurate readings, or the tube itself may be rotted out.
It's been a while since I've worked on the 7.3L, but I thought the EBP was strictly used to control the butterfly valve on the turbo during engine warm up? I think you can plug the EBP sensor solid and it wouldn't affect the engine performance.
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Old March 22nd, 2012, 08:38 AM   #24
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It's been a while since I've worked on the 7.3L, but I thought the EBP was strictly used to control the butterfly valve on the turbo during engine warm up? I think you can plug the EBP sensor solid and it wouldn't affect the engine performance.
I believe it also controls fuel mapping. You can unplug the butterfly at the turbo, but not at the sensor.
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Old March 22nd, 2012, 11:40 AM   #25
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White smoke is usually unburnt fuel, on startup it usually means one or more of the glow plugs are not working, but the no power could be something else.

This will be really hard to diagnose via the internet without a scan. Do you think your turbo took a shit, or possibly that fuel line blew off something that would regulate/read boost?
sure about that?
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Old March 22nd, 2012, 07:20 PM   #26
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sure about that?
You're such a tease... please enlighten us. And if you say coolant, I'll smack you.

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I believe it also controls fuel mapping. You can unplug the butterfly at the turbo, but not at the sensor.
Ya, it's been a while. I know for sure the 6.0L suffers from this but couldn't recall on the 7.3L.

Last edited by ThinICE; March 22nd, 2012 at 07:26 PM. Reason: derp
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Old March 22nd, 2012, 08:23 PM   #27
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sure about that?
Yup, why else would i post it?
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Old March 22nd, 2012, 08:56 PM   #28
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I dunno about ford so much but on other diesels white smoke means your head pressure on the injection pump is to high. usually a plugged return line orifice. on the older roostamaster pumps anything above 7psi sent the pump into advance timing mode (3 degrees) it would white smoke like crazy once warmed up if the advance didn't let off.
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Old March 22nd, 2012, 10:38 PM   #29
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The part i put on was called a egr pressure regulator right from orileys
But bump for anymore ideas
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Old March 23rd, 2012, 06:59 AM   #30
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The part i put on was called a egr pressure regulator right from orileys
But bump for anymore ideas
Have you tried what has already been suggested or what?

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I dunno about ford so much but on other diesels white smoke means your head pressure on the injection pump is to high. usually a plugged return line orifice. on the older roostamaster pumps anything above 7psi sent the pump into advance timing mode (3 degrees) it would white smoke like crazy once warmed up if the advance didn't let off.
older IDI's yes possibly, but Powerstrokes are set up different
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Old March 23rd, 2012, 07:22 AM   #31
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Cant get it anywere to scan it and been working to much havent even touched it but im gonna test to fuel pressure tonight.......what should the pressure be at the fuel dock?
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Old March 23rd, 2012, 07:23 AM   #32
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and i replaced the line to the manifold also with the sensor so it isnt pluged
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Old March 23rd, 2012, 08:43 AM   #33
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The fuel pressure through the entire system should be 45 PSI or higher under all conditions. It is best to test under all operating conditions because it could drop below 45 PSI under a load only which could identify a restriction. At that point, follow the fuel tank trick.
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Old March 23rd, 2012, 06:48 PM   #34
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Put a cam sensor in it.
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Old April 4th, 2012, 11:11 AM   #35
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Anymore ideas? And is it possible to put a smoke switch on a 95? Srry first powerstroke i only mess with cummins but the price was stupid cheap
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Old April 4th, 2012, 12:57 PM   #36
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huh, smoke switch? So it's not running right, you don't know anything about powerstrokes and you want to mess with it? sounds retarded
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Old April 4th, 2012, 08:33 PM   #37
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The 7.3 powerstroke is a great engine. It is very simple to work on also. A POS autozone scanner will not do the job. You need someone with a snap-on MT2500 brick scanner to look at it. You first need to do an injector buzz test. If it fails inspect the wiring harness where it goes through the valve covers. The glow plugs are also powered through these plugs and on a duty cycle they draw a ton of juice and will melt plugs. If it passes that you need to do a cylinder balance test. If it passes that You are pulling all the injectors to replace all the o-rings and disc seals. The white smoke once it warms up under load is unburnt fuel. Bad o-rings or disc seals will let fuel leak into the cylinder. This being the white smoke. The only way to diag that truck is with a scanner and not a cheap one. I have been a powerstroke tech for ten years.
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Old April 4th, 2012, 08:37 PM   #38
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The 7.3 only has a small hand full of problems. Most of the time I can diag the truck over the phone. They are very simple. Best engine out there if you ask me. And by far the cheapest fuel pump on any diesel.
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Old May 5th, 2012, 04:18 PM   #39
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Ok replaced the cps senser ebp sensor and tappit cover gaskit on drivers side and unpluged the fuel bowl heater it runs now but stalls once hot? Any ideas? Seems to be electrical somewere cuz it smoke white sometime then clears up?
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Old May 5th, 2012, 04:22 PM   #40
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Any has about 45psi at shrader vavle for fuel pressure at idle
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