Nissan misfire?

i have a 94 nissan maximum 3.0 dohc that has a chance low rpm misfire. it seems to stir away above 2000rpms.
when you disconnect the fuel injector the idle get rougher.
but when connect back contained by the roughness goes away a lilttle bit.

but when you removed the coil (on top of sparkplug) the fester does'nt change.

the coil is fine. it sparks and my spark plug is black. and near seems to be a rich smell from the exhaust.....

anyone hold any suggestions??

t.i.a

Can anyone give a hand?the airbag washout...



Answers:    You should definately try replacing the coil, they are different from front head to flipside head, if it is a flipside cyl. head coil take home sure the coil extender is not leaking, coils are adjectives on this engine.

There no ignition wires on this engine, no disrespect Polkan47, if there be you would have a particularly valid point though, thx.

if the misfire stayed in alike cyl. then you must enjoy either a fruitless spark plug, low compression on that cyl., intake air seepage on that cyl., faulty injector on that cyl.., or a cam or tap problem, I doubt any mechanical problem(internal that is), I am sure the answer is probably simple.

probably a unpromising plug!
these engines are very moody when it comes to the spark plugs, I hope that you are using the proper spark plug!, not some Bosch platinum AZ refuse!

Can u deal in prehistoric vehicle batterys...


I would change ignition wires to.

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