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Hello guys. I'm fairly new to this forum page because I just received a honda from my father in law. I need it to pass smog to get plates and it won't due to a misfire on cylinder 2. It past all test except low speed and only does it after warmed up. I've checked the intake manifold and gasket. Spark plugs and wires brand new. New distributor cap and rotor. And still doing it. What else could it be and what can I do to check it cheaply? Thanks in advance
Check compression and if low I'd follow with the leak down test. Could be something as simple as a valve lash adjustment or worse like shot rings or bad valve (burnt or needing to be lapped).
Oh and have you pulled your spark plugs to look at them, they can tell you a bit. Any of them oily, black instead of tan or other weirdness?
I don't think I've ever seen a misfire code on an obd1 civic before. I didn't think it was smart enough to sense it.
Originally Posted by TomCat39
Check compression and if low I'd follow with the leak down test. Could be something as simple as a valve lash adjustment or worse like shot rings or bad valve (burnt or needing to be lapped).
Oh and have you pulled your spark plugs to look at them, they can tell you a bit. Any of them oily, black instead of tan or other weirdness?
I have not pulled the spark plugs. I can next time I find time and look. What would those mean?
Well if one is oily then your car is spitting a lot of oil into that cylinder. If it's carbon fouled, it's usually too low of compression to burn properly.
Google how to read spark plugs, it can show you all kinds of things.
It could also be, if you haven't replaced them, the plugs are old and worn causing the misfire. NGK V-power is what works best in the old D series including your D16Z6.
Well if one is oily then your car is spitting a lot of oil into that cylinder. If it's carbon fouled, it's usually too low of compression to burn properly.
Google how to read spark plugs, it can show you all kinds of things.
It could also be, if you haven't replaced them, the plugs are old and worn causing the misfire. NGK V-power is what works best in the old D series including your D16Z6.
that whole part of system was replaced..but I'll definitely look into the plugs some more,, thank you
Replaced but not looked at? I assume you didn't do the work and the shop didn't bother to inspect and inform....
I still would do compression and leak down tests to see if it's a compression issue causing it.
And even a short run if it's spitting oil would show on the new plugs. To put them back in, you should get some permatex anti-seize in the grey bottle it's aluminum based. And the plugs get torqued to 13 ft-lbs. no more. Steel thread plugs in an aluminum head can be a very bad thing if yer not careful.
1995 Honda Civic Ex misfire
