Hello all,
I have a 1992 F150 Flareside 302 automatic 2WD that won’t start. I bought it last year and it had a rough idle along with misfires when downshifting. Did a tune up and the problem was slightly fixed but still present. 2 months ago it just would start. It cranks but won’t start. I checked for spark and there is none. The ECM looks decent. Changed MAP sensor and ICM as well as the ignition coil. Still no start. Just pulled codes and got O34 O67 and O85. Any thoughts on what it could be? Thanks in advance!

 

The first thing I would do is check to see if I have power up to the coil through one of the small wires that hook onto the coil. Turn the ignition switch on while doing this test.

 

Starting is a long complex process with many steps - you need to be very specific about what IS happening, and what isn't. Pics might help. You should also put ALL the truck's details & history into your signature as this page explains:

(click this text)


Phone apps don't always show signatures, so you may need to switch to a real browser in desktop mode on your phone, or just use a desktop/laptop computer.

 

I HAVE A 1995 F150 with the 300 inline 6. The check engine light will not go off nor will the OBD I read the codes. I have changed the EEC computer with a rebuilt one preprogrammed for this motor. I am getting spark and also gas. The truck will crank but not start. The distributor cap and rotary button along with the coil have been replaced. This was done prior to me getting it. I am getting approximately 50 lbs. of rail fuel pressure so that is good. I replaced the fuel rail injector switch. Since then it will turn over and blow back through the intake. I am no mechanic so not sure where to go from here. Any suggestions would be appreciated.
Thanks in advance.

 

Try pulling codes with a paperclip, and if you have fuel pressure, make sure that the injectors are firing and that you have spark. Also, there is no fuel rail injector switch.