When to replace knock sensor?
Thread Starter
Drifting
Joined: Aug 2001
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From: Minneapolis MN
When to replace knock sensor?
There was a recent thread saying knock sensors degrade over time, but I'm wondering should these be a regular maintenance item? It seems after 16 years it might be time to replace it. Do knock sensor need to be replaced?
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Re: When to replace knock sensor? (Lone Ranger)
first I've heard of it, but the concept would seem to make sense.
It is also curious that in three plus years of following this section closely, this is the FIRST time I have ever seen this. You would think, that if replacing the knock sensor improved performance, MAD and Eck;ers would be all over it :D
They would package a new knock sensor in their existing "20 Hp improvement kits" and Get more big $
I also refuse to believe that you should mix 1 gallon of coolant with 3.5 gallons of water. I have always used distilled water, on that I will agree!
:steering: [ I love that Lil Guy! ]
Team Owner
Joined: Aug 2000
Posts: 40,156
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From: San Pedro CA
Re: When to replace knock sensor? (jackdaroofer)
It was my thread that started this discussion... :)
however, the logic that we are using makes an element of sence.
the quartz crystal is under stress inside the sensor, it makes sence that over time, it won't work to optimal efficency.
at some point, the sensor almost has to degrade a small amount. if you're gonna take the time to pull old ones out at 100k miles or more, why not replace them. They ain't all that expensive!
I guess the old axiom that nothing lasts forever applies here.
What is your problem with a 1 gallon of coolant to 3.5 gallons of water?
[Modified by bogus, 7:50 PM 2/3/2003]
however, the logic that we are using makes an element of sence.
the quartz crystal is under stress inside the sensor, it makes sence that over time, it won't work to optimal efficency.
at some point, the sensor almost has to degrade a small amount. if you're gonna take the time to pull old ones out at 100k miles or more, why not replace them. They ain't all that expensive!
I guess the old axiom that nothing lasts forever applies here.
What is your problem with a 1 gallon of coolant to 3.5 gallons of water?
[Modified by bogus, 7:50 PM 2/3/2003]
Burning Brakes
Joined: Feb 2000
Posts: 824
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From: Camden SC
Re: When to replace knock sensor? (bogus)
If a marginal O2 sensor is possible, it may not require a leap of faith to suggest a 12-16 year old knock sensor may be on the way out. Oddly enough, just bought one today after spouse heard a "pinging" noise under acceleration (driver has high freq hearing loss). With no other symptoms, 12 year old sensor, $35 for a GM part made in Mexico, not going to hurt. I seldom buy parts without testing first but some situations will motivate me to buy new parts, regardless. Should one buy a used vette, a new O2 and knock sensor may not be a bad investment, along with a fuel filter. Having replaced pistons due to detonation, learned my lesson.
Of course, if codes are set, sensor with bad resistance check, much easier.
dlmeyers 90 coupe zf6 3 speed shocks
Of course, if codes are set, sensor with bad resistance check, much easier.
dlmeyers 90 coupe zf6 3 speed shocks
