I just recently dropped a b16 into my 89 ef hatch, and im having overheating issues, while driving or under a load, the temp gauge will dip back and forth and the car will fill like it wants to die as if it were running out of gas but i let off the gas and get back in the throttle and the temp gauge goes back down and it the problem goes away for a while. im not sure what the problem could be so any advice will be much appreciated.