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Old April 11th, 2010, 01:49 PM   #1
Kodiak450r
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Default lincoln 4.6 misfire

got this 99 lincoln town car that has a random misfire. it will run smooth then miss a few times then run smooth again. scanner said cylinder #4. i put new plugs, and plug boots on it, and recently changed the intake manifold so i cleaned the injectors while it was apart. i'm told that the coil packs go bad often but i've never heard of one working part time. all the coils i've seen go bad stop working completely. so am i looking at a dead coil, or a injector going bad? both are expensive to replace so i'd rather have a good idea before i buy the parts
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Old April 11th, 2010, 01:52 PM   #2
Bc1980
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swap coil from 4 to somewhere else see if misfire changes to a different cylinder.
ive seen them crack and only misfire when hot
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Old April 14th, 2010, 01:53 AM   #3
Blksnshn69
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also possibly a ripped o ring on an injector while you had it apart. It's pretty easy to rip them. Any fuel Leak? Or vacum leak?
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Old April 14th, 2010, 09:00 PM   #4
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Quote:
Originally Posted by Blksnshn69 View Post
also possibly a ripped o ring on an injector while you had it apart. It's pretty easy to rip them. Any fuel Leak? Or vacum leak?
neither. i never bothered with it anymore. owner doesn't have the cash to fix it right now so i'm not putting alot of time into it.
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