Don G

hi, i have a '96 3.4l that shows a misfire incyl4. wires good, plugs good, i noticed that cyls 1 and 4 share the same coil pack- is it possible to have a misfire in only one of the cyl from that coil pack? thanks, don.

nc994run

I have had that issue before and replaced a coil pack that solved the problem. I checked the CEL code multiple times (after doing spark plugs, then again after doing wires) and sometimes it would show a 1 cylinder misfire and sometimes it would show a multi-cylinder misfire, so I would put in a new coil pack and see what happens

97ltd4x4

It is possible,although there is a wire that goes to that cylinder as well(will say #1,wires are marked for coil location,NOT wire location)...If you want to find out swap out coils...If miss moves,you have a coil going..if not..chances are its that wire...This is to assume that the plug is good on that cylinder.

Don G

put in new wires just in case, plug looks good (20,000 densos), ran good for a few minutes then roughness again. drove 10 miles stopped. ran good for a few when i started it. can coil cause this- i'll swap coils tomorrow to see if code moves...

DeathCougar

iTrader: (23)

Yes, a coil failing can cause this.

darksoldier313

know ne one with a vantage or a scope?? easy way to tell

Don G

swapped coil packs, misfire stayed the same- cyl#4. next stop injector??

hross14

when i sent my injectors out for cleaning at 165k there were some that were in poor shape and others were moderate.

but a misfire--if it were me--(just to rule out stuffs or if it is time for changing)-- i would sweep the major sensors and scope it.

chad1041

i have this same problem new coil wires and plugs i have checked everything but the injector will check tommorow a little bit harder on mine (6th cylinder lol ) good luck ill let you know what i find out

Don G

#4 injector it was. thanks for the help guys!