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 F-250 7.3 L diesel SES light AGAIN! 
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Do a search for "Ford Powerstroke dead pedal". Throttle pedal position sensor. Pretty common problem.


Thu Aug 08, 2019 6:55 pm
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Rustywrench wrote:
Do a search for "Ford Powerstroke dead pedal". Throttle pedal position sensor. Pretty common problem.

Yup. On my truck it's called the FIPL.

On everyone else's vehicles, it's called the TPS or Throttle Position Sensor.

And seriously, all of the above symptoms point to it.

delliottg wrote:
Selador wrote:
Does this have a FIPL? (Ford diesel truck's equivalent to a TPS.)

All of that including the engine light, sounds like the FIPL is bad or at least badly out of adjustment.


No idea what that is.


See above.

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Thu Aug 08, 2019 7:10 pm
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Selador wrote:
Rustywrench wrote:
Do a search for "Ford Powerstroke dead pedal". Throttle pedal position sensor. Pretty common problem.

Yup. On my truck it's called the FIPL.

On everyone else's vehicles, it's called the TPS or Throttle Position Sensor.

And seriously, all of the above symptoms point to it.

delliottg wrote:
Selador wrote:
Does this have a FIPL? (Ford diesel truck's equivalent to a TPS.)

All of that including the engine light, sounds like the FIPL is bad or at least badly out of adjustment.


No idea what that is.


See above.


Thanks for the information guys. After a bunch of reading, I'm going to go with a bad/failing throttle sensor as Jeff & others surmised. I've ordered a new sensor off of Amazon, should be here tomorrow, and I can install & test it.

Crossing my fingers it's as simple a fix as it looks.

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Fri Aug 09, 2019 7:19 am
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David, another common fail that will leave you on side of road is cam position sensor. I carried a spare in glove box of my 95 F350.and a wrench.
Cheap insurance .


Fri Aug 09, 2019 7:34 am
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Rustywrench wrote:
David, another common fail that will leave you on side of road is cam position sensor. I carried a spare in glove box of my 95 F350.and a wrench.
Cheap insurance .


I'll look into that as well, thanks!

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Fri Aug 09, 2019 8:15 am
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Rustywrench wrote:
David, another common fail that will leave you on side of road is cam position sensor. I carried a spare in glove box of my 95 F350.and a wrench.
Cheap insurance .

Good thinking. But I don't think the CPS affects the transmission the way the FIPL does.
delliottg wrote:
Thanks for the information guys. After a bunch of reading, I'm going to go with a bad/failing throttle sensor as Jeff & others surmised. I've ordered a new sensor off of Amazon, should be here tomorrow, and I can install & test it.

Crossing my fingers it's as simple a fix as it looks.

Carefully mark in as many ways as you can, before you take the old one off. Maybe try to take a video or some pictures from every angle.

If you can get the new one back on there exactly the way the old one was on, you just might not have to adjust it...

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Fri Aug 09, 2019 9:47 am
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Occam's razor says loose vacuum hose, is why it's intermittent.

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Fri Aug 09, 2019 11:09 am
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PW45 wrote:
Occam's razor says loose vacuum hose, is why it's intermittent.


Burns oil, not gasoline, says the woodsman.


Fri Aug 09, 2019 11:32 am
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Old Growth wrote:
PW45 wrote:
Occam's razor says loose vacuum hose, is why it's intermittent.


Burns oil, not gasoline, says the woodsman.

Mine has a vacuum pump.

Recently replaced the rusted out, collapsed tin can they used for a 'holding tank'. Thing wasn't a reservoir, it was just one big vacuum leak.

With one I made myself from PVC and ABS. That new 'can' will outlive me...

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Fri Aug 09, 2019 12:06 pm
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Well, they do have a baro sensor. Sense manifold pressure, ie; boost. Early powerstroke had problems with the hose. 1999 model I don't think so. I suspect transmission, not tranny concern, related to throttle pos sensor. A "tranny" concern could happen after drinking too much in Thailand.
Cam sensor failure would be no start, stalling, tachometer inop.
2 cents worth from ex Ford mechanic.


Fri Aug 09, 2019 1:07 pm
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Selador wrote:
Old Growth wrote:
PW45 wrote:
Occam's razor says loose vacuum hose, is why it's intermittent.


Burns oil, not gasoline, says the woodsman.

Mine has a vacuum pump.

Recently replaced the rusted out, collapsed tin can they used for a 'holding tank'. Thing wasn't a reservoir, it was just one big vacuum leak.

With one I made myself from PVC and ABS. That new 'can' will outlive me...


I dont think a vacuum pump leak would cause runnability issues with the engine like on a gasser.


Fri Aug 09, 2019 2:31 pm
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Old Growth wrote:
Selador wrote:
Old Growth wrote:
PW45 wrote:
Occam's razor says loose vacuum hose, is why it's intermittent.


Burns oil, not gasoline, says the woodsman.

Mine has a vacuum pump.

Recently replaced the rusted out, collapsed tin can they used for a 'holding tank'. Thing wasn't a reservoir, it was just one big vacuum leak.

With one I made myself from PVC and ABS. That new 'can' will outlive me...


I dont think a vacuum pump leak would cause runnability issues with the engine like on a gasser.

I don't think so, either. But then, I still haven't checked out everything that is run by vacuum on my truck, yet. Vac lines all over the place!

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Fri Aug 09, 2019 2:36 pm
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OK, so I'm now wondering if I bought the wrong thing. Are there two sensors for the throttle? One inside the engine compartment attached to the throttle body, and another on the accelerator linkage? I can see one (or what looks like one) above the accelerator linkage in the cab, but videos (and I can't find a 1999 specific video) seems to show a different location for the sensor in the engine compartment attached to the actual throttle body, right next to the butterfly valve.

This video shows the accelerator linkage one I'm talking about. Can't seem to get the YouTube link to work properly.
[youtube1]https://youtu.be/uflxLZcEKE4[/youtube1]

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Sat Aug 10, 2019 2:35 pm
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Your 7.3 Diesel is a powerstroke. It is computer controlled. Some of the information shared by others here does not apply to 1999 7.3 DI.
A 7.3 Direct Injection Diesel, Is what you have.
7.3 IDI, indirect injection is old style, with sensor mounted on injection pump, on engine, called FIPL. So, the sensor inside the cab on throttle pedal is the only one your truck has. Hope this helps.


Sat Aug 10, 2019 3:54 pm
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Rustywrench wrote:
Your 7.3 Diesel is a powerstroke. It is computer controlled. Some of the information shared by others here does not apply to 1999 7.3 DI.
A 7.3 Direct Injection Diesel, Is what you have.
7.3 IDI, indirect injection is old style, with sensor mounted on injection pump, on engine, called FIPL. So, the sensor inside the cab on throttle pedal is the only one your truck has. Hope this helps.


Thanks! That makes me feel better!

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Sat Aug 10, 2019 3:59 pm
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