PDA

View Full Version : Cylinder 3 misfire


FMCI
06-15-2021, 08:21 AM
I’m having a bit of a problem here with a misfire on cylinder three. I went ahead and replaced all the spark plugs and I also replaced the coil pack on cylinder 3. The car ran great again for two days then the problem came right back with Cylinder three. Not sure what’s up with it now. Any suggestions?

Thanks.
03Merc
06-15-2021, 09:06 AM
Could be injector, You need to run a cylinder contribution test on a professional scan tool.


Sent from my iPhone using Tapatalk Pro
FMCI
06-15-2021, 11:41 AM
Alright so I just took the spark plug back out and it still looks brand new so I decided to put the old coil pack back on to see what happens and so far it’s eliminated the misfire and it’s running smoothly again. My guess is the new coil pack I bought was faulty.
keeping my fingers crossed the problem doesn’t come back.
03Merc
06-15-2021, 11:42 AM
Alright so I just took the spark plug back out and it still looks brand new so I decided to put the old coil pack back on to see what happens and so far it’s eliminated the misfire and it’s running smoothly again. My guess is the new coil pack I bought was faulty.
keeping my fingers crossed the problem doesn’t come back.

It could be injector, coil, or plug that causes a mis. Or a wiring issue.


Sent from my iPhone using Tapatalk Pro
blazen71
06-15-2021, 12:25 PM
Only use OEM Ford COP's
FMCI
06-15-2021, 01:44 PM
So now the marauder is throwing a P0325 code after figuring out the misfire and clearing that up.
I’ve been looking all over the web for the location of the knock sensor but can’t seem to find it.

Would anyone be able to point me in the right direction to locate it?

Thanks.
03Merc
06-15-2021, 01:55 PM
So now the marauder is throwing a P0325 code after figuring out the misfire and clearing that up.
I’ve been looking all over the web for the location of the knock sensor but can’t seem to find it.

Would anyone be able to point me in the right direction to locate it?

Thanks.

Knock sensor is under the lower intake manifold in the valley of the engine block. Check the harness to make sure it's not burnt or torn. May have to remove upper and lower wiper cowls.


Sent from my iPhone using Tapatalk Pro