The canister vent valve is located in back close to the fuel tank. The canister purge valve is located up front on the engine. If you're looking for the purge valve, look for a black plastic vacuum line under the hood that has a green dust cap on it. Follow that black line back to the engine. It will be connected to the purge valve.
it take 4.2 liters of oil
Need to know what engine it has.
what is the firing order for 1990 chev trans sport and where is number one piston locoted
No it will not, not even close.
yes, HEI distributor
yes
No.
intake manifold
Need to know what size engine you have to tell you if it is an interference engine or not.
320 h.p.
Any constant vacuum source.
If it's a Chev V8, then it's at top rear of the engine, next to distributor.