sr20 misfiring randomly, help please

[got2b240]

What could cause a cylinder to misfire randomly. I have a redtop sr20det, stock turbo (t-25), w/ greddy fmic, greddy bov, full exhaust w/testpipe and 3 inch hotpipe, running around 11 boost. But the problem is noticible around idle, it just hesitates and shakes a little when it misfires. and around 1,700 rpm it sounds like it does it more often, i guess cause engine is moving faster. I tried checking the sound of the injectors and one of them doesnt tick as loud. I would appreciate any help possible on this issue.

Also my oxygen sensor is smoked and Im wondering if that makes any difference in this issue. I will be replacing it when I find the part number for it.

[Eurotuner325i]

mabey the spark plugs? idk id check them just in case

[180fan]

if that aint it, check the CAS for misfire. Next thing to check easily is the coilpacks, they are supposed to have ~1 ohm between + and -. Mine all had about 0.7 and 0.8. Ignitor might need to be checked too but I think that info's already up on NICO.

[got2b240]

thank you verry much, i will ohm out the coil packs tomorow, and check the spark plugs. How would I go about checking the CAS and the Ignitor? If you can hook me up with a link I would appreciate that. Thank you for your help so far.