hey im new to the forum and i was wondering if anybody can help i just pulled out the engine of my 93 rx7 to replace stupid vacuum hoses and doubled checked everything but now the car will not start i have good compression all the hoses r where they need to be at i cant figure it out. the car did start i ran it for a little bit then turned it off white and black smoke came out, then i tried to turn it on again but it stalls can anybody help me please

Mmmmm, usually the vacuum hose replacement doesn't require the engine to be removed. It will take time, but you might want to double check all the routing, if your not careful to do one at a time, it's easy to make a mistake. Check valves are a bit easier, but worth making sure they're working normally. Finally check the BOOST SENSOR, the small black sensor mounted on the firewall near the throttle-body with a single vac hose leading to it. If it's unplugged, it tends to give similar symptoms. It also sounds like it might be flooded now so I'd also check your plugs.