toilet plunger knock test?

[Mark Romans]

With or without the plunger and tap the block near the sensor,  just the
equivalent of dropping it from 2-3" onto the block.  I have seen guys use
1/2" extensions too.  It's not necc to get carried away.  Just a few bumps
should let you know if the sensor is working.
Mark
-----Original Message-----
From: Jake Sternberg <chickens at ccwf.cc.utexas.edu>
To: diy_efi at esl.eng.ohio-state.edu <diy_efi at esl.eng.ohio-state.edu>
Date: Saturday, October 24, 1998 10:13 AM
Subject: toilet plunger knock test?


>
>With or without the rubber plunger part attatched?  And how do you
>drop the end of the handle near the knock sensor onto the block if
>the sensor is screwed into the bottom side of your V8??
>
>-jake
>
>ORIGINAL MESSAGE:
>
>> From: "Mark Romans" <romans at pacbell.net>
>> Date: Fri, 23 Oct 1998 20:14:28 -0700
>> Subject: Re: No knock, knock
>>
>> According to the GM Training Center Classes I have had the approved
>> "J-Tool"  for checking the knock sensor is a wooden toilet plunger
>> handle. Use it to tap on the block near the knock sensor, like dropping
>> your pencil vertically on the eraser to watch it bounce.  The knock
>> sensor should pick this up as an engine knock and retard the timing.  If
>> no knock is noted, it's time for a new knock sensor.  Mark
>
>