I just started my 90' integra up the other day and the check engine light is on. I stopped at a gas station to take a look, and when I started it back up it was off. A few days later while driving, it came back on. Now its staying on. its throwing codes 36 and 4, in that order, its converted to obd1 using a p28. At first I thought its my map sensor (motorola 2.5bar) so I bought a new one hooked it up and same thing, so now Im not so sure. Its running very rich, and wont rev past about 3.5k. I'm aware there is no code 36 by the way, but thats what its throwing. Any suggestions?

 

maybe it's not 36, but 27 or 45
for example...maybe your reading the last long light , and it short be a short light