I am not sure what this cylinder one is called
Hi all,

Its been a while since i posted but i think i finally found out the random misfire that has been going on with my truck for years. After running all the test (TPS, air temp sensor etc.) i took out the PCM and found these three capacitors that seem to be friend. I was wondering if anyone has ever replaced these before and what exactly they do (i cant seem to find a diagram for them). Also if anyone could tell me what kind of resistor (size) that last picture is along with that black cylinder looking capacitor (i think its a capacitor) that would be great.



This PCM is out of a 1995 F150 5.8L, E40D 2wd

 

That black component looks like a diode.I can't tell exactly all the colors on that resistor from the pic. I wouldn't waste time trying to fix that PCM. Save it for a core and get a REMAN from a good parts source. Myself, I would get one from Rock Auto.

 

Ya thats probably what im going to end up doing

 

The small vertical ones are electrolytic capacitors. They're available cheap, and are easy to replace, if you have a steady hand & understand soldering. Read this thread:
https://www.fordf150.net/forums/view...p?f=21&t=97221

The last one is a high-current power diode. That might take a little more effort to find, and it'll take a MUCH-bigger soldering iron to R&R.

 

Thanks, you dont happen to know what those capacitors control do you? That diode is a bugger to find seems to be old design.

 

They control capacitation. They don't directly control any one thing - they're just parts of their circuitry.