Parked my neon for about 48hrs, started it today and it was running very badly all of a sudden (misfiring) with check engine light flashing. I got codes 12 and 43 cylinder misfire. Now I have a MSD coil pack, bosh +4 spark plugs and fairly new spark plug wires. Can it be that my PCM is DEAD or ****ed? Again I find it very odd that it was working fine and now its doing this. I checked all sparkplugs and connections all ok.

 

well you can do away with getting the +4's next time they do nothing for power gains
seems as if everyone that parks their car for a few days it then acts up

its cause your car hates you cause you think you neglect it.
i once parked my car for a year and then charged the battery unlocked the rear hub then started right up with no issues

maybe a timing belt?

 

Timing belt was changed last summer....

 

Put some stock Champion plugs in there, reset the PCM and see what happens.

 

if u dont know how to re-set the PCM, just unplug the negative terminal for like 20-30 min. or take out the fuel pump fuse for about 5-10 min.

 

Sadly I dant have the car at my house to try it out. I had a road trip with the guys from work, left monday night got back tonight and car was just not running right. So I will try to do that once I get it back home. Not good to drive the car when its misfiring eh?