I've been troubleshooting a cylinder misfire over the last month. I'm getting random misfire code plus codes designated to each cylinder(1-4) every now and then.

I've done a full tune up, here is a list of what's been replaced up to now.

Plugs
wires
Cap
rotor
Coil
Fuel filter

Did a Dry compression check, and here are the results.
Cyl 1 - 190 psi
Cyl 2 - 190 psi
Cyl 3 - 100 psi
Cyl 4 - 190 psi

Okay that isn't good, so I did a wet test on Cyl 3, results are 210psi. So that means the cylinder ring is toast.


I was planning on cleaning out the IACV tomorrow and replacing the throttle body gasket, but now I'm not sure if it's worth the money.

What do I need to look at next?
Or should I even bother given the compression on cyl 3?

 

I had a simmilar issue with my DX except my comp is #3 was 25 ! and 63 in #4 replaced the valves missfire/codes weant away all 16 valves can be got on 3bay for 70 shipped if you have the know how/will to learn it's worth a try cheaper than some of the parts i see on you'r list. don't waste you'r money on the TB gasket. give the iacv a clean for the heck of it tho.

 

if the ring is toast i would just keep the maintainance up on it and drive it to the ground until ur saved up to swap another motor... the TB gasket is probably a waste. Its definately not valves if compression shot up with oil in the cylinder. it would have still had low compression with bent valves..... 100psi is well beyond spec but the other 3 are good. so u have 3 good cylinders and one limpping along. unless it starts creating a missfire i wouldnt bother.