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Thread: Knock Sensor #4
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Old 09-27-2007, 07:29 PM
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sc 540i sc 540i is offline
Location: CT
Join Date: Apr 2006
Posts: 1,343
Mein Auto: 540/6 Sport
Originally Posted by cn90 View Post
Anything vibrating in the same frequency of spectrum that a knock sensor is designed can trigger the knock sensor.

Knock sensors picked up a binding water pump and tried to adjust the engine accordingly. Made the entire car rock at idle! Let's just say anyone who rode in the car at that time was less than impressed with the crown jewel of the BMW line-up! The defecytive WP can barely be turned by hand.
And in typical fashion that incident was followed shortly with a failed radiator!

What is your year and mileage?
WP original???
99 109,000, waterpump was replaced 500 miles ago. I think it might try and find a stock intake because I deleted the stock intake muffler, and put a plug in so that's a possibility, and I might try that crc maf cleaner. I appreciate all the help cn90 this is what the forums are about . Anymore ideas?
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