i have a 92 f150 302 5-spd, that has a poor acceleration problem, and today i did a self-test with a jumper wire. i came up with a few codes but some i don't see on the code list. here are the key on/engine off codes: 52, 294, 962, 94, 96.
for the running test, i got the truck to operating temp. turned the steering wheel half a turn and pressed the brake then let off. i floored the pedal when i got the single flash. heres my results for the running test: 255, 225, 52. i'm thinking maybe i messed up its actually should be 25 and 52 maybe? anyway, would any of these codes be the cause for my sluggish acceleration problem?

 

You will not get a mix of two and three digit codes. It's two digit codes throughout the tests or three, not both.

 

ok, now all the codes make sense so key on/engine off codes would be as follows: 52, 52, 29, 49, 62, 94, 96 and engine running test codes: 25, 52, 25, 52 again. i'm not sure why a few numbers repeat but would any of these 2-digit codes cause poor/sluggish acceleration?

 

does anyone know what these codes mean? not sure what to do now

 

92' model should throw three digit codes, chance it could have had the PCM swapped out for a earlier model but should double check make sure if you're counting flashes.

Keep in mind while doing so the codes repeat, a single flash separator between KOEO and CM codes. Seperator code is actually "10" however it is signified by a single flash that method.

If any doubt/trouble stop by a shop offing read codes for free to be sure, call first verify they can read OBD1. Might help to if post your location perhaps another member with a reader lives near by offer to help ya out a minute.

Do not disconnect battery until you've read the codes, they will be lost if you do so requiring drive cycle to rebuild that data again. No big deal but adaptive is also lost by doing so.

 

i was aware of the separater code while i did it. i'll double check to make sure its two-digit codes, but at first i thought there were 3 digit codes too but they didn't make sense lol. i'll go try it again to confirm if its 2 or 3 digit codes and let you know

 

ok with the key on/engine off test i got a 5 followed by 2 then about a four second pause followed by a 5,2 again, but no separator light between. i'm assuming my truck has 2 digit codes then?

 

52 = Power steering pressure switch always open or closed. Regardless you should get the separator flash and then an "11" following it if no CM codes have been stored.

If its responding correctly the KOEO test includes the CM test no way around it, fact you get nothing or have nothing beyond that, the separator flash followed by CM system pass = 11 or trouble codes either one, suggests something isn't right. Either a problem with the PCM itself or something in the way you're running the self test or both.

Two or three digit far as that goes makes no difference.

Previous run for example you do have a CM code listed, "49" = SPOUT signal default to 10� BTDC. its a CM code only not a KOEO or KOER result.

It does tend to look like your truck throws two digit but gotta be sure, don't want to chase incorrect codes. Might be a early run 92 or someone swapped in a computer from an earlier model. Not a problem if it had just need to be sure, work with correct information.

 

My '92, 302, AOD, 4wd is 2 digit codes.

 

Yea going by this, (copy paste from code reader manual)

Ford Diagnostic Trouble Codes are composed of two- or
three-digit numbers.
n
Most early model Ford vehicles (up to 1991) use a two-
digit code system.
n
Most late model Ford vehicles (1992 to 1995) use a
three-digit code system.

That and the fact 92 - 96/97 are grouped together electrically.

Perhaps were had not depleted two digit style PCMs yet in 92, used left over stock until gone.

 

While it is nice to be able to pull codes with a paper clip it is full of caveats. While I do agree your truck displays 2 digit codes your counting method is off. There is always a separator code between the KOEO display and the CM display. Many code readers will display that as a "10" but if you are counting flashes it will be a single flash.

You are starting off okay with Code 52 it looks like it goes awry after that.

Cut from my 1992 Ford Truck Service Manual:

Code 52 (KOEO) Power Steering Pressure (PSP) switch circuit open

Code 29 (CM only): Insufficient input from Programmable Speedometer/Odometer Module (PSOM)

Code 49 (CM only) 1-2 Shift error (E4OD error only)

Code 62 (CM only) Torque Converter Clutch error (E4OD only)

Code 94 (KOEO only) Torque Converter Clutch (TCC) solenoid circuit failure (E4OD only)

Code 96 (KOEO/CM) Fuel Pump circuit open - battery to PCM

As you can see many of those codes are only displayed in one test or the other and the true definition is not valid since you have a 5-speed manual.

Your KOER Codes definitions:

Code 25 (KOER) Knock not sensed during Dynamic Response Test

Code 52 (KOER) PSP circuit did not change states


I think your flash counting for the KOEO and CM display needs to be re-ran because your codes are all over the board and do not make much sense to me.

As previously noted the codes are flashed twice for each test, it's designed that way..