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Jeep Wrangler YJ
YJ General Discussion
Knock Sensor
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<blockquote data-quote="deadpool1" data-source="post: 439642" data-attributes="member: 21229"><p>this sensor loves to make folks angry, ( justified)</p><p>it was designed wrong.! 91 is the cure.</p><p></p><p>on the intake manifold it does not belong there. it hears valve noised and goes nuts (the intake plenum box i bet acts as a nasty echo chamber)!!</p><p>one if the tests in the FSM is to ground out its KS output pin, to do dizzy timing tests.</p><p></p><p>this kinda hints at what to do, (keep it grounded out (jumper) and time the dizzy the old fashioned way to find ping point and the back off a few degrees</p><p>like we did from 1920 to 1985, (zero EFI)cars.) did mine that way in 1964, a chevy 1961 283 v8</p><p>we had test drive it on a hill , and lug the engine on purpose,then back shop, and lowered the advance,2degr at try.</p><p></p><p>pick a fuel grade and stick with that and turn the dizzy for max advance and no ping.(we called it the ping point)</p><p></p><p>the book even warns us, the KS must be set to spec,torque (wrench) or it fails hard. clear as day stated, and now gone it is.forever and ever. gone.</p><p>none sold.</p><p>that is what I'd do for sure.</p></blockquote><p></p>
[QUOTE="deadpool1, post: 439642, member: 21229"] this sensor loves to make folks angry, ( justified) it was designed wrong.! 91 is the cure. on the intake manifold it does not belong there. it hears valve noised and goes nuts (the intake plenum box i bet acts as a nasty echo chamber)!! one if the tests in the FSM is to ground out its KS output pin, to do dizzy timing tests. this kinda hints at what to do, (keep it grounded out (jumper) and time the dizzy the old fashioned way to find ping point and the back off a few degrees like we did from 1920 to 1985, (zero EFI)cars.) did mine that way in 1964, a chevy 1961 283 v8 we had test drive it on a hill , and lug the engine on purpose,then back shop, and lowered the advance,2degr at try. pick a fuel grade and stick with that and turn the dizzy for max advance and no ping.(we called it the ping point) the book even warns us, the KS must be set to spec,torque (wrench) or it fails hard. clear as day stated, and now gone it is.forever and ever. gone. none sold. that is what I'd do for sure. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Knock Sensor
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