power loss on 1 cylinder?

[Nekoni]

90 Eclipse GSX, stock fuel, stock ignition, 16g, 9psi, stock intercooler.

It first started out with just a misfire in 1st or 2nd gear, it would pop 1 to 3 times as it was reaching into boost but higher RPM it ran like a top. No boost spike or boost creep. My airflow is staying well below 1500, my injector p/w is 15 m/s max, my intake temps tonight were reaching 110.

So anyway, like I said, at first it was popping in first and second gear at about 2500-3500 rpm and higher RPMs I was fine. But just tonight I could NOT get into boost. As soon as it saw a hint above 0 that cylinder was GONE. I believe it was cylinder 4 considering when I first got the car, I started it up and it was misfiring. I didn't clean up the connection on the plug but I plugged it in a few times to clear it off a bit and the misfire went away. I'm currently in the middle of finishing cleaning that pigtail and injector connection as well as the other three. But if that doesn't work, what else do you guys think it could be?

 

[absolute_DSM]

Youre jumping to conclusions. Start with the easy things :

Boost leak test it & make sure you have NGK plugs gapped to .028".

 

[92awddsm]

Replace plugs and wires. The corrosion you are seeing in the coil terminal is from high resistance in the plug or wire itself. Most likely, the plug wire.

 

[Nekoni]

Youre jumping to conclusions. Start with the easy things :

Boost leak test it & make sure you have NGK plugs gapped to .028".

I'm only jumping to conclusions because I own a DSM

I'll run out and get some new plugs tomorrow and throw those in and put an ohm meter to my plug wires.

Thanks.

My plugs were wore down to about .050 so I tossed some new 7131s in, runs better but the misfire is still there. Plus, I noticed this last time my tach was jumping about 100rpm on a decel from a slight rev. I'm thinking my cam angle sensor at this point, anybody else agree or have any other opinions?

 

[Nekoni]

I actually unplugged it before I started it and it was running on two cylinders, so it's def. a different cylinder then the one I first had problems with. I'll keep watching it.