I have a 1996 F150 XL 300 6cyl. It's not firing consistantly. It took about thirty minutes to crank it. It turns over but it only fires about one out of thirty times.I am getting fire to the coil but it's not getting past the coil. I would appreciate any advice you can give me.
The only thing that I can think of looking thru my diagnostic routines is that the TFI / Pickup coil in the dist is the problem . The TFI instructs the coil to saturate and fire and since yours is firing spordically I would suspect thats the problem . Since the coil fires sometimes it makes me want to lean toward the TFI as the cause . Usually coils either work or they dont . Replacing the pickup coil in the dist along with the TFI seems to be the best practice when the TFI fails . How many miles on your truck ? Any other problems before this current one , any related problems ?
WHAT KIND OF FIRE TO THE COIL?12 volts BATTERY
POWER AND SWITCHING SIGNAL?OR ONLY THE 12 volts?
IF YOU'RE ONLY GETTING BATTERY POWER CHECK ALL
YOUR IGNITION ELECTRICAL CONNECTIONS AND GROUNDS.
USE CAUTION WITH TEST LIGHTS AND MULTIMETERS,THEY
NEED TO BE HIGH IMPEADANCE TYPES TO PREVENT DAMAGE
TO THE ELECTRONICS.