Engine quit running Going down the road and the engine quit. The engine did not make any noise when it quit - no backfiring, chugging, loud noises, etc. There has been a noise (like a diesel pickup sound - chattering) and an increase in the engine rpm's as I shift through the gears for the last month. The distributor will not rotate when the engine is turned over. I removed the distributor from the engine. Gears on distributor look fine. Thinking it may be the timing chain but a check in the Chilton Manual indicates there is no timing chain or belt just 2 gears. My next step unless someone has other suggestons is to remove the radiator, fan, and timing cover to check the timing gears. 1994 F-150 with 4.9L (300 cubic inch) straight 6 cylinder. 147,000 miles on truck oil change every 3500 miles truck did not miss, burn oil, etc. Someone posted a site that discussed Ford problems but I can't find the reference. Anyone know what it was? Thanks for any help.