99 f150 wont start

Asked by Dec 05, 2015 at 02:15 PM about the 1999 Ford F-150 Lariat 4WD Stepside SB

Question type: Maintenance & Repair

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?

2 Answers

22,870

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.

2 people found this helpful.
7,075

Another thing to look for is if the theft light is blinking while starting. It could be the theft system activating.

2 people found this helpful.

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