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2000 Town Car Signature - cylinder 5 misfire - again

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lasmith

New member
Feb 23, 2022
4
2
3
About 6 months ago cylinder 5 began misfiring. Replaced coil pack and spark plug. Ran fine until today when skipping began and check engine light started flashing before going off, then staying on. Checked the codes and indeed cylinder 5 is misfiring again. Anyone have any ideas why this cylinder keeps failing?
Thanks
 

JuanOrtiz219

New member
Apr 2, 2022
7
1
3
My Lincoln
2006 Towncar limited signature
Im going through this same mess .. except mine is cylinder 6 i also get all kinds of codes. two good mechanics both state my ECM is the culpret i got to replace it. I pray its not that in your case. I changed all the spark plugs the coils the connectors had the Mas air flow checked the pressure in the cylinders everything checks out only thing left it could be is the ECM for me anyway
 

dave42

Senior Member
Jul 6, 2015
720
404
63
Leander, TX C.K.U.
Be sure that your thermostat housing or intake crossover isn't leaking. I 'think' cylinder 5 is the one that is most likely to be affected by some coolant getting into the well.
 

lasmith

New member
Feb 23, 2022
4
2
3
Im going through this same mess .. except mine is cylinder 6 i also get all kinds of codes. two good mechanics both state my ECM is the culpret i got to replace it. I pray its not that in your case. I changed all the spark plugs the coils the connectors had the Mas air flow checked the pressure in the cylinders everything checks out only thing left it could be is the ECM for me anyway
It turns out that the problem wasn't cylinder 5 even though the code was for number 5. Ended up replacing all the plugs which did the trick for me. I hope you will be able to repair yours without too much trouble.
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