Rick's Free Auto Repair Advice

Ford F-450 cranks but no start

P0340 Ford F-450 cranks but no start and intermittent bucking

If your F-450 cranks but won’t start or starts and then bucks, head for the camshaft position sensor. It’s located on the right side of the engine timing cover above the crankshaft balancer. Camshaft position sensor, F-450You’ll need a scope to check it because it creates a 12 volt square wave. Probe the dark green wire to check the signal. If the signal is erratic, replace the sensor. This sensor has a high failure rate and may not even be worth testing. If you don’t have a scope, just replace it.

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© 2012 Rick Muscoplat

Posted on by Rick Muscoplat


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