1989 Lincoln Town Car Repair Question
Topics covered: Sensor, Egr valve, Knock sensor.
Mileage: No information provided.
Mileage: No information provided.
Asked on March 7, 2006
1989 lincoln towncar
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.
Asked by dirrttyAnswer
Replied on March 7, 2006
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.
Basicaly 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.
A couple of articles on knock sensors.
http://www.wellsmfgcorp.com/counterpoints/counterp_v4_i4_2000.pdf
http://www.motorvate.ca/mvp.php/507
Good luck and let us know. :)