99 f150 wont start
99 f150 turns over but wont start. just purchased a couple months ago , so I thought I would change plugs plug wires and coil packs. after that it still wont start. the fuel pump switch is not tripped. Any ideas what it could be?
Use a spark detector attached to each plug to make sure each plug is firing. If they are, then the problem lies elsewhere. Check the fuel pressure at the rail with key on. Pressure readings can be obtained from the net.
Another thing to look for is if the theft light is blinking while starting. It could be the theft system activating.
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