NOOOO is not my Firebird what is wrong, it is the 93 Ford Aspire of my roommate. It suddenly shut down when driving, deccelerating and finally swtching off. The ignition is working, but the engine does not start. It does not start and stalls, only it does not achieve to start. It does not seem a problem of the battery, the lights and electrics work well, but I have noticed a blue powder accumulation in one of the electrodes. At the beginning I thought it was because some spark plug failed, but I talked to my father (who turns out to be a good mechanician) by phone and he told me it should start even stalling with only three spark plugs. And it seems unlikely that the four spark plugs failed at the same time. Do you know what could be the problem? And please do not answer: take it to the mechanics, I already know that answer. Thanx.