I recently purchased a 1994 Ford F Super Duty with a 7.3 IDI e4od dually(5.19 rear gears) Now I replaced the throttle position sensor(fipl sensor) and vehicle speed sensor(in the rear diff) and can't drive more than 100ft without transmission going into limp mode. When I pull codes(after changing sensors) koeo I get 23 and 29. 23= throttle position sensor out of range, 29= insufficient input from vss or insufficient input from psom. I don't know how to check vss but from everything I've read online the speedometer acts up when the psom goes bad, mine acts normally. I adjusted the tps/fipls until I have 1.1v at idle and 3.8 at wot. That is what everyone says specs are for it. The only thing I can think to do is take the sensors back and exchange them. I'm not a mechanic but I know enough to get myself into trouble. Anything helps. Thanks

 

The code 23 happens if you don't hold the accelerator pedal on the floor during the key on engine off test.

The PSOM can run the dash while sending bad info to the PCM.

 

Thanks,Do I have to hold the petal down or can I push the throttle linkage back with my hand, and can I just clean the connections on the psom or do I need a new one?

 

As long as the sensor sees that you're holding the pedal down it doesn't care if your foot is on the pedal or you're holding it with your hand.

You can just clean the PSOM connectors. If your problem is dirty connections that will fix it. If the problem is a bad PSOM then it isn't going to fix it.

 

Do I need to wait to be prompted to hold throttle down because my code scanner flashes cade 10 and I can't find code 10 anywhere, I think code 11 means ok, I think I've read some where that 10 ment to hold down throttle but I didn't know they ment koeo I thought it was koer . I learn something new everyday. Thanks

 

on my scanner I have to
press the pedal to the floor
turn on the ignition
turn on the scanner
tell the scanner to activate


It shows the operating/active codes (followed by O) first then will flash a "10" if everything is ok then it will check the constant/codes in memory followed by a "c", if all is well it will flash an "11"


so it sounds like you have no active codes by getting the 10 and then you have a stored code 29c, is your O/D light flashing?
as Mark said above 23 is for not having the pedal to the floor

 

Mark you were right all I had to do was take the connectors off and clean and I put some dielectric grease in while I was there, everything is back to normal. Scott, my o/d light was flashing but cleaning the connectors and adding some dielectric grease to the psom connector solved the problem. Which scanner do you have, I have the Innova yellow Ford odb1 scanner from autozone. I'm going to run the scanner when i get home to see if i missed any thing. I'm sure it'll work this time time, now that you two walked me through the process.

 

Glad to hear it's fixed. I also have an Innova scanner


For some unknown reason I couldn't erase my codes with the scanner and I had to disconnect the batteries for about 20 min. to finally make my Constant/memorized code erase

 

I erased the codes on accident by holding the memory button down, I think. I know this is off subject but when the water pump goes bad does it leak from the bottom? I now have a coolant leak that I believe to have traced up to the bottom of the water pump.

 

I'm not smart enough to trouble shoot the water pump, you're better off starting a new thread with it in the title.

 

If an IDI 7.3 has a place to connect a scanner I would like to know where.

I know the DI 7.3 Power Stoke does, from the second half of 94.

Just asking!

 

the connector is on the rear of the driver's side engine compartment,
not sure if it's a early 94 or E4od exclusive or earlier years or manuals have it,
you can do a search and probably find pictures,

 

It would only be on trucks with an E4OD. If the truck doesn't have an E4OD there is no computer, so no place to connect to the computer.