why does cylinder 7 keep misfiring even after I replaced the coil, sparkplug, and wires on my 02 Jag S-Type 4.0L?
after my mechanic replaced the ignition coil and sparkplug on cylinder 7 and fixed any wiring as well, #7 cylinder will misfire and engine light comes on after a driving for a little while. This has happened 5 times
Do a compression test. See if #7 is lower than the others
That,s the only way,to know,,
i was told that you must replace all coil packs when you replace one or the one you replace will keep going out! Have anyone else heard this?
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