I've got an OBD2 b18b in my 90 Civic Si. I've swapped everything over to OBD0, dizzy, im etc. Everything is fine, except one thing, when i plug in the Map sensor it idles up to 2k instantly. If i unplug it, it drops right down, and runs a bit rich. Could a faulty map sensor be causing this? I should mention, the Map is hooked up to the small nipple on the TB and t's into the map like it should.