This is a common problem on Ford systems that use this style of camshaft sensor. In particular the 3.0 and 3.8L engines. The internal bushings of the cam synchronizer housing will wear out and case the shaft to wobble which will damage the camshaft position sensor. Complete replacement of both the synchronizer housing and camshaft position sensor is needed when this happens. Setting the timing for these things can be tricky without the Ford specific tool but they can also be set with a scope. In this video I will show you how to troubleshoot these systems as well as how to set the cam synchronizer timing.

Engine Performance Diagnostics chapter 21 pages 2-16

symptoms 50

  • severe hesitation at high RPM and heavy load
  • possible check engine light with cam sensor codes
  • misfire
  • intermittent loss of power under load

fix 50

  • replace cam sensor and synchronizer assembly

test shown enh 50

  • how to use the O2 at wide open throttle to determine the cause of a low power complaint
  • how to view a graphed pulse width of a fuel injector on a scope
  • fuel injector voltage waveform on a scope
  • when to view injector duty cycle and why it is an advantage over monitoring pulse width in some scenarios
  • duty cycle vs pulse width scales (which one should you use)
  • a review of Chapter 3 page 30
  • how to test a cam sensor (VR type or magnetic type)
  • how to remove the synchronizer assembly
  • how to replace the cam sensor
  • how to set the synchronizer timing
  • proper cam and crank sensor relationship waveform

Tools used

  • scan tool
  • lab scope

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(Chapter 21) Ignition inputs, cam and crank

Related videos:

Ford Cam Sensor Synchronizer Test:


How to test a Ford crank sensor (Ford 2 0L Case Study):


No Start, No Spark, No Injector Pulse (faulty crank sensor):


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For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available as an eBook or paper book.

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