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Ok under acceleration my car seems to misfire. My buddy stripped one of the bolts that holds the uper intake to the lower intake the other day, but it ran fine for a day or two after that, i think i am running a lil rich though. what could it be, its a 85 300zxt automatic.
 

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y do you think youre running rich...black smoke and lots of sut in the exhaust may tip you off i spose...check the oxygen sensor...a sensor 30k to 50k miles old is usually going bad soon...times are changin tho and its not unlikely for them to go past 100k
 

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Dam he must have really tightened that bolt. Take your intake off and put silicone around all the ports and tighten it back down and it should be fine that is probably your problem is it backfiring along with the misses?
 
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