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Automotive/Engine Misfire
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Question
Hi there Sean, We have a 1996 Nissan Maxima it won't pass emissions due to a misfire. How do I diagnose and repair this problem thank you
Misfire is caused by one of 3 things,no spark,poor compression or no fuel.Test fuel pressure at the rail,check for spark and then do a compression test on the cylinder thats missing.99% of the time it is a bad wire.A basic tune up will help if the compression reads approx 120psi.Fuel pressure will be 45psi.
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Questioner's Rating
| Rating(1-10) | Knowledgeability = 10 | Clarity of Response = 10 | Politeness = 10 |
| Comment | Thank you for the response. turns out i had a bad wire hey thanks again | ||
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Automotive
Answers by Expert:
Sean Halliday
Expertise
general auto repair,japanese,bmw,mercedes,mini cooper 1960/2009,general british cars,ford.I DO NOT work on automatic transmissions.Manual transissions i install clutches only.Many people ask me to diagnose noises from their cars,unfortunately i cannot do this unless i hear it.As you appreciate,vehicles can and will make a variety of noises.I DONT UPGRADE or fit aftermarket performace kits,parts,chips,only replacement parts.
Experience
40 years experience on all general auto repair.
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