2001 5.4L moisture in Coil on Plugs causing misfire
2001 Navigator 5.4L - I had to replace one of the coils on the driver's side some time ago, and since then, I keep getting moisture under the coil cover that eventually causes a misfire. If I remove the cover and let things dry out, then the misfire goes away.
I don't drive this truck much. Where is this moisture coming from? Is it getting under the cover from outside, or is something leaking/cracked/broken internally? |
Could be leaking intake, you did not say which cylinder or what color moisture.
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Was cylinder #5 this time around. Will drive it for a few days while waiting for F250 6.0L parts and see if/when it happens again and try to see if it's coolant or just water.
Leaking intake? Broken/cracked or a gasket issue? |
OK, it is up front so it should not be water leaking down from the windshield wiper cowl.
Check color and greasiness. Could be either reason you mentioned about intake or a porous head casting. Don't let it take out the coil drivers in the ECU. Factory manifold replacements only if cracked. |
Thanks for the tips, jesse! reps sent.
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You probably do not wash the engine or drive through enough water for the fan to spray it onto the engine do you?
If you had previous trouble around number 3 or 4 cylinders the coolant pipe or hose for the heater sometimes leaks. |
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