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Old 02-20-2006, 09:30 PM   #1
5vistoomuch
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knock sensor

i would like to say hello. i just purchased a used focus zx3 zetec with a manual. it has 58k on the clock. however sadly after the warranty ran up i had a few issues. so i plugged in a scan tool and found out that my knock sensor is at 5v at idle. that is just astronomically high. its so high that i believe its working backwards. when i blip the throttle at idle the voltage goes off the charts. furthermore, it seems to be advancing the timing instead of retarding it. anyone else run into this problem?? please help if you know anything. oh yea the knock sensor reads 1023 volts KOEO.


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Old 02-21-2006, 02:27 AM   #2
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nothing guys ... no ideas ??
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Old 02-21-2006, 02:31 AM   #3
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I have a idea ...................opps sorry lost it hopfully someone will comealong and be more helpfull than me so here is another bump for you.
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Old 02-21-2006, 03:31 AM   #4
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you have a knock sensor?
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Old 02-21-2006, 05:59 PM   #5
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do i have a knock sensor ?? that is a good question i plugged in the scantool and it was reading voltage at the knock sensor. 5v to like 75v when i hit the gas
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Old 02-21-2006, 09:41 PM   #6
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anyone??
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Old 02-21-2006, 10:13 PM   #7
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The knock sensor it located on the rear(closest to firewall) of the engine.
About the middle of the engine and I believe it's the one with the yellow and white wires.
It's about 9 o'clock from the oil filter looking at it from the back of the engine.
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Old 02-21-2006, 10:40 PM   #8
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5V seems really high....and 75V is insane (i think....). Are you sure it was reading volts not mV? How does the car drive? Does it feel like the timing is off (sluggish)?
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Old 02-21-2006, 10:51 PM   #9
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exactly how it feels ..... sluggish it kinda has no get up and go ...help please!!
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Old 02-22-2006, 10:58 AM   #10
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where are the zetec gurus ?
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