There is a "Wiggle Test' for checking connections/ wiring to sensors.

For later OBD1's. the injection system changed from EFI (Electronic Fuel Injection) to SEFI (Sequential Electronic Fuel Injection).

If your engine is a later SEFI OBD1 (Some but not all 95's), you can perform a "Cylinder output balance test". This shuts off each injector one at a time & identifies & aids in locating problems specific to individual cylinders.

See link: https://www.f150forum.com/f10/heads-...05/#post623219

 

Let us hope the ECU ROM is not fried. It would run, but in Failsafe Mode.

 

Ok now I have no idea whats going on!!! Just got the code reader and here are the ELEVEN codes!!!!!! 117, 126, 122, 112, 327, 513, 553, 552, 565, 556, 558....DO I HAVE A FRIED COMPUTER?????

I checked the fuel pressure at the rail and it was 60 psi...so thats good...

 

Read this: https://www.f150forum.com/f10/heads-...05/#post623219

To begin w/, don't give a rat's *** about codes w/ engine running.
Concentrate on KOEO (Key On/ Engine Off) codes only.

Are those (KOEO) the codes you're giving?

60 psi might be too good. What PSI do you get w/ the Vac hose to the Fuel Pressure Regulator removed? If no increase, it implies a bad FPR.

#513 = PCM voltage failure could be the PCM relay pooching, or a bad connection in the socket of the relay connection, which is common. (as w/ the Fuel pump relay connection socket)

 

Not sure where the PCM & FP relay is kept on your year. If you have an under the hood external fuse box, I'd look there. Otherwise they are "usually" mounted to the back side of the air filter housing, next to each other. PCM relay is brown based, FP relay is green based.

 

I just followed the instructions that the code reader said with the car off and ignition in the on position....These are the 11 codes it gave me.

 

You want to see code 11, not 11 codes.

Well, I believe that makes you the KOEO code record holder for this Forum anyway. Glad you got the code reader, you never would have kept all those flashes straight!

Re-read this while I dig up my code book:

60 psi might be too good. What PSI do you get w/ the Vac hose to the Fuel Pressure Regulator removed? If no increase, it implies a bad FPR.

#513 = PCM voltage failure could be the PCM relay pooching, or a bad connection in the socket of the relay connection, which is common. (as w/ the Fuel pump relay connection socket)

 

That would be awesome if the relays were making a bad connection.....How would you rule that out and what does "pooching" mean?

 

Going bad.

 

Are you separating the KOEO's from the continuous Memory Codes.They are denoted as to what they are by the letter O/R/ or C in the upper right hand corner of the code reader display. (See page 21. Item 3, If your manual is the same as mine)

Also engine should be pre-warmed to normal operating temperature, before either the KOEO or KOER test, or you will see some potentially irrelevant codes.