I have been chasing a miss for a week or two now....since I installed a wet kit. The only thing I could figure is I screwed up a wire or plug. It has a low rpm miss and shakes and shudders...pops through exhaust. I replaced wires...problem did not go away. In the LT1 forum someone suggested I check the resistance of the new NGK TR6's I put in. So I did..here's the results.
3680
3868
3920
4033
4184
4265
4706
5122
Does anyone know the range of acceptability? Do any of these look odd or abnormal? I used a fluke digital meter to ohm them out.

 

Did your car start missing after you ran the nitrous one time? If so, have you checked all of your plugs since you ran the nitrous? Maybe you fried an electrode?

I know with my old vortec setup (350, 9.9:1, vortec heads, XE274 flat tappet), the TR6's were too cold and fouled extremely easily. Maybe you are having the same problem?

 

No I haven't even tried to spray yet. I noticed the miss as soon as I pulled it out of the driveway. The hotter the motor gets the more noticable the miss is ...thats why i thought I fried a wire.

 

That could be, I would pull a spark plug to make sure they aren't fouled as well. I wound up having to drop down to TR55's with my setup.

Good luck.