"If the catalytic converter is the OEM unit, and the Thermactor Air Injection Pump (smog pump) is missing, then the catalytic converter is NOT working. It can't."With the cat not working, does it hinder anything? Better to remove it or leave it there for looks? It's fairly new, looks better...
I should specify, it is the vacuum reservoir canister. The coffee can is gone. The charcoal can is in tact and all vac lines are good.The cat is replaced, my header pipe was rusted out and the replacement y-pipe came with the cat. Originally I think I had two. Unfortch, 3 of 4 exh to...
long time reader, first time poster.Great info!I have a 90 4.9 IL6 5 spd.When I bought this beast the air pump was bypassed, black (smog thing?) cylinder was gone, even the vacuum canister is gone. I had a horrible exhaust leak so I replaced from the pipes/cat/muffler from the manis back...