I have a 1991 Acura Integra, only 140,000 miles. My car is running on 3 cylinders and oil is leaking from the oil drain plug. My friend, he's pretty good mechanic says to change the spark plugs. I found the last spark plug wasn't firing. After I changed all the plugs, same problem. Next, he says it could be the Fuel Injectors. I ordered some Venom Injectors and replaced them. Still the same problem. N/E body know what could be the problem? Thanx....