Ok I need some help with this one.

Spark plug #5 on the spark plug wire and 2nd on from the fire wall

I have 1 spark plug not firing...I disconnected the spark plug wire and the engine had no reaction. I turned the engine off and I found the spark plug wet with gas. The rest of the plugs are firing.

I changed the spark plug wire with a spare one and I have no change didn't make a difference. I changed the the coil aswell no change.

would it be just a faulty spark plug?

will the TPS have any affect on the spark plug firing.

I have fuel
I have air
just short 1 plug for firing

1989 m20

Thanks


Later on that day...........................................

Put a new plug in, I swaped out the rotor and cap and still have the same problem. that one plark plug not firing.

-changed the spark plug
-changed the spark plug wire
-changed the rotor
-changed the cap

still plug number 5 (2nd from the fire wall) not firing

Question? will the TPS or the AFM send signals to the computer not to fire that plug?

I have a spare AFM and throttle body that I will try tomorrow.

I did change the CPS 2 twice and no change in the engine

I have all new hoses

What about ICV will that send signals to the computer?

Thanks