Maybe compression?

[bcjjones]

Figured out my car has a little miss. Has new plugs and wires. So with the car running I started to pull one wire at a time till I found it. When each one is pulled the car immediately dies except for one. The car will stay running but I can tell a little difference when that one is plugged in and when its unplugged. So its kinda firing but not as efficiently as the other three that make the car die. So what are all the possibilities? Im thinking either compression or maybe the coil pack going bad. What do y'all think?

 

[Evil94Evo]

This could be a stuck injector or a bad plug. A compression test is in order to begin with. You could pull the injector plug see how it reacts, pull the plug wire and put another plug in it to see that you have spark for sure. If pulling the injector plug changes things, plug another injector in the plug you have pulled and see if it clicks when the motor is turned over (better yet, unbolt the cas and spin it by hand with key on ((unplug coil pack to keep motor from sparking fuel etc as the car will think its trying to start)).

I've seen plenty of dead individual injectors in my time. PM me if you want more help on this specific subject.

Good luck!

 

[bcjjones]

Have already done both. Switched plugs with another cylinder and no difference. if I unplug the injector on that same cylinder it has about the same effect as unplugging the plug wire. Will slow the motor down but not kill it like when I unplug the other injectors. If that tells you anything?