i have a 91 crx with a b16 swap and it is idleing around 3,000-4,000 rpm and their is no cel on and it is not the tps, throttle adjustment or any of that, but if i put it in reverse the idle drops like a thousand rpm but then the cel comes on. please help im taking it to a shop on monday but i was just seeing if anyone else ever had a problem like this or could maybe tell me something to check. thanks