The truck literally runs like dog crap, it’s hard to start, has almost no power and the check engine light comes on... when it dries out it runs perfect... I try to run codes but get different random codes every time.. whatweird is when it’s like this the fuel pump will just run continuously and most times it won’t read codes like the computer is messed up... but if it doesn’t rain it always runs fine, I go out after a rain and it’s crap.

Any suggestions?

93 F350 460Auto 2wd

 

Yeah sounds like you have a computer problem, disconnect the battery and pull out the PCM, I suspect you will see evidence of corrosion from water/moisture penetration and if so that means you need to replace it.

 

Sounds like you have a moisture/humidity problem.

Fill a spritzer bottle with water and lightly shoot the dist and then IGN wires.

 

You posted twice before on issues related to the computer and both times you were told you have a bad computer.

https://www.ford-trucks.com/forums/1...ry-change.html

https://www.ford-trucks.com/forums/1...-computer.html

So for the third time: You have a bad computer. Pull it out and inspect for damaged capacitors and/or burn marks. You can try replacing the capacitors if the damage is minimal.

 

I know, I made a new thread because it really seems to be related to the rain. I plan on yanking the computer tomorrow

 

I know this won't be helpful but I has the same exact problem with my 93 460. Coincidentally my timing cover was cracked. So I replaced my timing cover and I expected to have a no start condition next time it rained and I would fix it then but the truck never did it again and no one has ever figured out how or why the coincidence.

 

I’ve been waiting for dry weather for weeks so I could go out there while it’s running and spray areas with water but it’s been raining on stop... South Florida life

 

This is not the first thread about this problem. Maybe here or other sites. Maybe subford or Steve83? I probably have a link but can't find it.

Seems like there's some weatherstrip issues leaking water on the firewall and the ecm plug needs all of the dielectric grease you can pack into it.

This link might help and you can find more like it:

This one is not the best. Save it for last. I posted better links later in this thread.

https://www.ford-trucks.com/forums/1...ter-relay.html

 

Don't spray anything with water, pull the damn computer and inspect it for F sake!!! You've had some of the most reliable/experienced people on this forum tell you, what appears to be many times over, that your symptoms are indicative if a computer failing. Add myself to that list....

spray bottle is a fine suggestion, but your symptoms are so obviously pointing to the computer, and it's so easy to pull and inspect, that you'd be wasting your time if you did anything but pull it at this point.

Need I say more? I'm exhausted anyway.....

 

So I finally took yalls advice

I got the harness off the front and the two bolts as well as the rubber grommet but the PCM won’t budge out... I’ve tried tapping it from behind but I don’t want to break t... everything I’ve read or seen videos of say it just slides out. What am I missing?

93f350 2wd auto 460

 

Has it moved at all?

 

Seems to have moved like a half inch outwards and it moves up and down pretty easily but I’m afraid to damage it

 

....is it hitting the plastic wheel well?

 

Not even close, it’s like it’s seized to the metal bracket that it fits into... the whole mess is corroded

 

So... You started another thread on it.

https://www.ford-trucks.com/forums/1511872-pcm-stuck-in-93-f350.html

Sigh.

Please take my advice and keep the discussion of one problem within one thread. Most of us do not have the patience to chase everything across the entire board.

Now, as far as getting your ECM out, I would not be at all surprised to find corrosion has built up or welded other parts to your ECM case. I would not hesitate to applying what force is needed. That case is pretty robust and personally I have had good results with prying. Access in the 92 and up is kind of difficult because of that huge cast aluminum brace, but it can be removed with a moderate degree of difficulty should you need access to the backside. Access out the engine side is limited by the plastic inner fender. If removal is this difficult, it would be in your best interests to remove the inner fender. There is a clearance problem anyways and the extra working room will help.