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Why does my truck crank fine and run good except for a hard random miss every so often while driving down the road?

Check engine light on, indicating cam position sensor. I replaced cam sensor, same thing.. I had a local shop replace distributor with a new one I got from Auto Zone because I don't have the proper scan tools, still same... they replaced the distributor again under warranty and actually didn't charge me labor, but still same

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You'll probably need a shop to check it out.
The code for the cam sensor usually means the computer is not getting a signal, or it is not in sync with the crank. Since you replaced the sensor, the problem could be the cam or the circuit between the sensor and the engine computer.
There is a flow chart with tests to run for each trouble code.

Posted on May 02, 2015

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Posted on Jan 02, 2017

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