hi
1992 honda accord
i just bought this car with 400.000 kms on it and i drove it home and proceeded to do a tune up(spark plugs, rotor, cap,wires,fuel system cleaner) after i replaced everything i start it up and cylinder 2 does'nt fire at all i checked the wires and timing and i am geting spark and fuel WHAT THE HELL COULD IT BE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! it does not make any sense!

 

How did you come to the conclusion that it's not firing, when you have both fuel and fire? Is it missing or something.

First thing that comes to mind with 400k on an engine, would be possibly blown rings or the top piston land let go. I would do a compression test on all 4 cylinders and see what you get.

 

well i concluded its not firing because when i pull the spark plug wire the motor runs the same and when i pull the injector wire it also has no effect on things, but i will do a compression test and see what that tells me

 

So are you absolutely sure that you have both fuel and fire going into the cylinder? Have you physically checked both? Pulling the wire from the spark plug and the injector clip from the injector dose not confirm or refute actual fuel & fire to that cylinder. You need to physically check for spark at the end of the spark plug and fuel at the end of the injector.

If you pull the spark plug is it wet or dry? If you pull the spark plug and turn the engine over does fuel spray out of the spark plug hole?

 

yes i am absolutly sure , i pulled the sparkplug out and saw it sparking when the engine was turning over and while the plug was out i saw fuel mist come out of the hole

 

Compression test!

 

yup compression test since you did the tune up of the ignition system it put out its max potential causing more compression thus causing something to fail that was on the way out. ive seen this happen on old engines that get the head redone to new and once you start the car the piston rings blow due to the new head putting up higher compression numbers. if compression test is low. the next test would be a leak down test to verify where the leak is exactly it could be the piston ring went the exhaust valve went it it could also be the intake valve went