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Car Forum / Honda Cars / August 2005valves or pinging?
Hi, how can I tell the difference between valve misadjusment and pinging? next time I fill up I am going to try higher octane, 93 instead of 87, if the noise goes away I conclude it is pinging, if the noise remains I think it must be the valves. is this logic correct or faulty? thanks > Hi, how can I tell the difference between valve misadjusment and > pinging? next time I fill up I am going to try higher octane, 93 > instead of 87, if the noise goes away I conclude it is pinging, if the > noise remains I think it must be the valves. is this logic correct or > faulty? thanks valve adjustment does not affect pinging. nor does bad valve adjustment sound like pinging either. pinging is detonation, much like the noise a diesel makes. if you're getting it, either your timing is wrong [most likely], your combustion chambers are coked up, your oxygen sensor is failing and you're getting too lean a mixture, or there is something seriously wrong with your gasoline. high octane is more detonation resistant than low octane so yes, if the noise goes away, it's detonation with low octane gas. again, don't get fixated on the valves. they rattle, they don't ping. Thanks, I also noticed that this noise occurs under load when I push the gas pedal, but if I push even harder it goes away! In other words only in a certain range of acceleration, too little or too much and the noise is gone. Also, it is hard to describe the noise, but to me it sounds like a vibrator or something like that, i.e. one of those electric thingie used used for engraving or marking, (don't think of the vibrator some might use in bed!!!); is that pinging? > Thanks, I also noticed that this noise occurs under load when I push > the gas pedal, but if I push even harder it goes away! In other words [quoted text clipped - 5 lines] > used used for engraving or marking, (don't think of the vibrator some > might use in bed!!!); is that pinging? I have always compared the sound of pinging to beans being shaken in a tin can. If that's what your pinging sounds like, either your timing is off, or perhaps you have a cheap quality gas brand (not necessarily low octane) in the tank. My '93 Accord exhibited the same symptoms with cheap quality gas. > Hi, how can I tell the difference between valve misadjusment and > pinging? next time I fill up I am going to try higher octane, 93 > instead of 87, if the noise goes away I conclude it is pinging, if the > noise remains I think it must be the valves. is this logic correct or > faulty? thanks You did not mention the type of car you have. I have a 99 Accord and it came from the factory with a Knock Sensor. If your vehicle came from the factory with a knock sensor--it might be defective. I believe it works by retarding the timing when the sensor detects pinging or knocking. After the sensor determines that the knocking or pinging has gone away--the timing returns to normal. If the knock sensor is broken, you will have pinging and knocking problems. If you decide to trade in the car, make sure the car you buy came from the factory with a knock sensor.  SignatureNEWSGROUP SUBSCRIBERS MOTTO We respect those subscribers that ask for advice or provide advice. We do NOT respect the subscribers that enjoy criticizing people. 1997 Civic LX 5-speed Manual Transmission, US model. does it come with a knock (ping) sensor or not? Thanks |
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