Btufts

Car started misfiring about a week ago. The engine light would flash right after i felt the engine murmur. It would only misfire on acceleration, never at idle.

I did a full tune up with new plugs, new wires, new distributer cap and rotor. I noticed the car would drive smooth in city traffic until i began driving back roads and had my engine around 2500 rpms for a longer period of time.

I have checked my injectors for any discrepancies in rythm and rhe voltage in the wires as well. They checked out fine. I have done a compression test on all four cylinders and they all checked out fine at 180 psi. Performed a wet test and they all reacted the same with very little to no change.

I acidentally yanked the tops off my spark plug wires and replaced them. Today, i drove about 30 miles on the highway without any misfires. As I hit 30 miles it began misfiring again and sending off a flashing engine light again. Only about 2 to 3 times. Before it was anywhere from 3 to 17 times. Very sporadic and all over the place.

I guess im confused as to why it would run so smooth for that many miles and then come back. I noticed that it starts misfiring between 2250 and 2500 rpms. Not a violent misfire, just a gentle hickup.

I put seafoam in the gas tank. Hoping it is a clogged injector. Will be taking it out this week to check. Other than that i can't think of any other causes besides a distributer misfire on one of the sensors. Could it be the ignition coil? I know there is only one so i cant think it would effect only one cylinder. Any body have any ideas? I really dont want to dish out money to have a mechanic tell me something i could have eventually figured out.

I will also mention i just replaced my catylitic converter and both O2 sensors. Though, the misfire was occuring before i replaced it. Could there be an issue there?
Any feed back is greatly appreciated.

MAD_MIKE

Have you checked your EGR manifold and ports are clear? This would coincide with part throttle cruise bucking.
Have you verified the valves are correctly adjusted?

Btufts

I will check the EGR manifolf next. As well as the injectors. I am not familiar with adjusting valves. Will probably have a friend help me with that if the EGR manifold doesnt check out.

Thanks for the advice.