• Tiny
  • dirrtty
  • 1989 Lincoln Town Car

Check this out, I had a code 34 for the egr valve I replaced the egr valve and sensor, reset the timing and also released the code for the egr valve by disconnecting the main lead. My timing was off and I had it reset every time it is reset it ends up changing itself. How does this happen and why? Also what is a knock sensor and what purpose does it serve.

Do you
have the same problem?
Tuesday, March 7th, 2006 AT 10:48 AM

1 Reply

  • Tiny
  • peppermrj
  • Member

When you check or adjust timing there is 1 wire that you disconnect at the distributor. This is to adjust the initial timing. Once that wire is reconnected the computer will adjust timing based on different sensor inputs.

Basically a knock sensor detects detonation and signals the computer to retard timing. The are very sensitive to installation torque. They cannot function properly if the installed too loose or too tight.

Good luck and let us know. :)

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Tuesday, March 7th, 2006 AT 7:08 PM

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