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PO300 help

I'm having the same issues, exact same... so far ive:

-checked for vaccum leaks
-new wires
-new plugs
-cleaned butterfly
-had ICM tested at autozone
-new coils
-changed crankshaft position sensor
-2 bottles of seafoam, 1 lucas injector cleaner
-cleaned intake filter

still missfiring...
 


well. I think I've got it solved this time. Put in a brand new PCM with fresh programming. No more misfires.
 
Ok. here's all that I did.
1. Alt rewire + volt booster (Thinking that the wire from the alt was shorting a bit)
misfires went away for a while but then came back just like before
2. had the code read again and it was now a 3 cylinder misfire
3. ICM replaced
4. Now it was reduced to a 1 cylinder misfire
5. replaced coil and injector for said cylinder (did not help at all)
6. replaced and reprogrammed PCM
7. Still misfire free after several hundred miles. Usually the missing would have returned by now.
 
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