Question about 1988 Nissan 300ZX

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Z31 missing on #4 cylinder

I have a 1985 300 zx missing on # 4 cylinder. Wires, plug, distrib,
checked out ok. I changed the ecu and it still run the same. What
could be the problem?

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Could be a sticking valve. Get the compression tested at a garage just to eliminate it from the equation. It may also have a faulty fuel injector.


Posted on Feb 02, 2010

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You could have a bad head gasket or piston you should do a compression test on the motor to look into the problem further. to do this you take out the spark plugs and screw the tester into the hole were you took out the spark plug and crank over the motor. do this to all of the cylinders and compare the compression in ever cylinder

Posted on Feb 02, 2010

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