#1&4 cylinder misfire

[DaveBrooks]

I am having a misfire in cylinder 1&4. i have changed the coil and plug wires still nothing , any ideas???????????????????????

[kakarot]

I am having a misfire in cylinder 1&4. i have changed the coil and plug wires still nothing , any ideas???????????????????????

maybe like a model name and a year, that would help a bit

[DaveBrooks]

Sorry for that my brain must be misfireing too. 95 plymouth neon sohc

[m glassburner]

Need more info ???

[DaveBrooks]

it misfires at idle. I pulled plug wires to see what cylinders and when i pull 1&4 nothinh happens. it only stumbles when I pull 2&3

[kakarot]

So, basicaly 1/2 the coil does not work. And you said you changed the coil.
1. check that the new coil is aclually good. Get a voltmitter/amiter and probe the coil. it should be like 1&4/(+)/2&3 or combination of the 3. in short there has to be same resistence between a pair of connectors on the coil. Check the coil resistence too inside.
2. if 1 checks out, you will have to trace the wires all way back to the ECU and cheking for continuety.
3. if 2 checks out, check the connectors for dirt, oxydaxation, etc...
4. if 3 check out then its the ECU

good luck.
PS, did you get the exact same P/N coil as was originally?

[DaveBrooks]

I got the same coil in fact I took it off my running street car. i checked continuity between the engine harness and the coil and it all checked out. then i plugged the engine harness into the main harness and checked for continuity from the coil to the main plug to the pcm. There i found a couple of faults. so it looks like I will have replce the harness from the pcm to the firewall.

[Billhyco]

wouldn't just be A LOT easier to swap the coils around? then pull a plug wire to see which cylinder is dead?

[DaveBrooks]

I swaped the coils cyl 1&4 are dead I retested the harness and found no faults.

[kakarot]

okey, lets take it a step at a time. Check that there is actually no spark in the coil. Can be done by plugging an exta spark plug into the wire and running the engine. Check cyl 1 and 2 that way. To be sure that the spark plug is operational.

On some coils there is +/-/signal, signal jumps between +/0/-
the wires might be fine, but there might be no power going there. I do not have a manual to be sure. I google it a bit later.

Love solving problems like that

[DaveBrooks]

I tried the spark plug and still no luck. Thanks for the help

[DaveBrooks]

Problem fixed. I had an msd tach adapter,shift light and tach hooked up according to the directions, Well it was not letting the signal fire 1&4. Now it runs great. Now all I have to do is find someone whoe kb=knows how to wire up the tach and I'll be set.