The engine is a 94 d16z6 installed into 93 sedan. What should this engine idle at. The problem we have is when u crank the key, it starts to idle at 600rpm for 5-10 sec then shoots up to 1500rpm and stays there. At 600 rpm the engine is struggling to stay at idle sometimes it stalls b4 it can raise to 1500. I know this isn't suppose to happen, what could be wrong, plus I do not have the vtec wire hooked up. How would I find out where this wire goes.