I put a DOHC ZC in my CRX, It starts, but runs rought. I have several issues with timing.
1. AEM cam gears alignment marks are way off being accurate, I tried to line them up but once lined up, valves were opened, so I set them up by just looking at the camshaft lobes
2. I don't have a timing belt cover, so to set the bottom end at TDC, I inserted an 3/8 extension through the sparkplug hole, and tried to feel when the piston was at TDC
3. code 9, cyl sensor

I think that all of these things are related to the running rought issue, so:
how can I check if the timing is right?

BTW, I'm not ghetto for setting up the timing like that, I'm something like McGyver, lol.