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1988 Buick Riviera Computer Trouble

Tiny
RUMPSTER
  • MEMBER
  • 1988 BUICK RIVIERA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 46,000 MILES
Getting a EO41 trouble code. (Cam sensor failure) Already changed out the cam sensor and ignition module. Going by the flow chart from the manual for this error code tells me that my new ignition module is bad. Flow chart has me check cam sensor wiring harness at points A-B and B-C. A-B is low (5 volts), B-C is OK. Ohmed out circuit 633 OK from module to sensor and to ground. Any suggestions.

Thanks.
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Tuesday, February 10th, 2009 AT 2:43 PM

1 Reply

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
I have seen the pick-up magnets fall off the timing gear. That is what the sensor sees going by to know cam timing. Rmove the sensor and turn engine slowly by hand to be sure the little piece is on the cam gear
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Wednesday, February 11th, 2009 AT 7:39 AM

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