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psmoore's avatar
psmoore
Explorer
Jun 16, 2013

Crankshift Position Sensor????

Workhorse chassis, 7.4 V8 454. Had an extended crank, and it didnt catch, turned it off and restarted and fired right up. Service engine soon light came on. Stop at a repair shop and they got a code for the crankshift position sensor. Also a 1 and 4 ignition coil. He told me the coils could be in relation to the csp. In clearwater, fl heading to disney then back to nort westeren il. The engine fired right up after cooling all night. It is not missing while running. Running as smooth as it had the last two days. Not sure if I should worry about it here, or finish my trip and get it fixed at home? Any suggestions??

13 Replies

  • You had a no start event and you have a trouble code that indicates a problem with the crank position sensor or the circuitry to it. From my experience, I would suspect that you will have trouble with it in the future. These issues don't generally heal themselves. When it will fail again is anybody's guess.

    Did your shop run any test on the senor/circuit? A simple resistance test at the PCM connector will often lead to the source of the problem.
  • Might have been a one time hiccup or the sensor is starting to fail. When it fails you will need to be towed. If you have time while in Orlando and the kids are enjoying It's A Small World take coach somewhere and get it replaced along with the coils. The sensor is part of the ignition timing loop. Without the sender the system does not know when to trigger the spark plugs to fire. Replaced the mechanical distributor.
  • I have seen engines get a fault code like you described, why it didn't start right away may never happen again, clear the codes and see if they return. I would not worry about it. All those electronic controls sometimes act just like my personal computer and "get a mind of their own" and it never happens again. I hope this helps, Bill