88 560SEL - Emissions Fail

[Jigglybus]

Hi,

I live in Ontario and emissions are required up to 25 years.... just my luck my MB is 24.5 years old.

It's been sitting a while and recently brought out of the garage. I changed all fluids, spark plugs, wires, cap and rotor, and air filter.

It passed everything at idle (although it has a strong stumble... see other post) but failed HC's at cruise. The belt for the air pump is not there, but I thought as long as the CAT was warme up, it should be ok?

Am I wrong? Should I replace the belt? I'm not sure if the pump even works.... it was disconnected when I bought it.

(ps.... you might notice I have a few new posts on here, sorry for the flood, I have quite a few gremlins... thanks for your help!)