okay i just got a 90 civic hatch with a b16A swap,the car is my daily and has a few problems that need fixed soon. 1. car runs rich, has adj fuel reg,fuel rail, 255 fuel pump how can i get it to run right? It smells really bad! 2. car uses a lot of oil but it is leaking, noticed alot of oil comes out of breather on valve cover, the breather is soaked in oil. is this bad? should i get a catch can? 3. cel for tps but car still runs fine, big concern? also has aem wideband o2 setup, when it did work sometimes it would go to 15-17 is this bad tune? shouldnt it be near 12 all the time? and the gauge randomly quit working and says 14.7-8 all the time, heard this was bad sensor but when i drove it on gravel again it randomly worked again for a few and quit (i checked all connections so idk what the deal is). 4. there is a wire ran from the stock obd0 o2 connector to the exhaust like before the cat, there is nothing connected to it, i did notice like i have an exhaust leak and there is no o2 in the hole before the cat!! I noticed my car gets crappy mpg and call me crazy but does not run as strong as it did, could having no 02 be why? and shouldnt it be throwing a code for o2 as well? car is running on obd0 ecu. any advice will be greatly appreciated! p.s sorry this is a lot of sh** lol.