Just replaced the plugs on my 1994 BMW 318is. Was running strong for about three days, although I notice a lack of power under 800 rpm that totally disappeared after that. Shut my car off for about ten minutes, and came back and it started up strong and clean. After running about 20 seconds it shut off on its own and it hasn't started since. Starter is turning over fine. Car is not getting fuel or spark. fuel pump is good, dme and fuel pump relay are good as well.