i put a 1998 b18c1 in my 1995 civic ex. it starts but it idles eratically. when i drive it it sputters and feel to have only 50 horse power. it also was back fireing a little bit. there is coolant leaking from the line that goes to the iac valve. i replaced the line and it still leaks. it almost seems as if it is not leting the coolant pass through there. i took the iac off and tested it according to the helms manual and it works fine. could someone please help me out ive been trying to fix this problem since the last week and can not figure it out.