how loud is pinging? the noise i heard was VERY quiet. i had to strain to here it. also, could a TA change the tone of my exhaust at all? it seems like it was deeper, and it seemd like i heard a lot more sounds coming from under the hood, but nothing really sounded bad to memustangbru8 said:you'd know if it was pinging, you can feel it too. Did it never do it until you did the T/A? I would back the timing off 1 degree at a time and see if it goes away and try a higher octane too to see if it goes away.
GTn00b said:Well I guess my car is pingingwhen the car is under load it sounds exactly like what you described!!!! I havent done anything to the car besides a o/r h pipe that leaks like a sumb1tch, what else could be my problem I use QT 87 gas
JohnyD05 said:what exactly is the pinging damaging!? and whats happened, is it pre-ignition?
Excellent Post!mrpositraction said:The pinging is preignition. When your piston comes up for the compression storke and the spark plug ignites the gas, you want a nice even burn across the top of the piston. pinging, detonation, pre-ignition are all the same and what happens is that you create to much compression and the increase in compression raises the temperature of the gas enough to ignite it w/out the spark plug and you get an explosion in the cylinder (this is how a diesel works). By raising the octane, decreasing the A/F raitio, or by pulling timing away, you can prevent this. Do one or a combination. And someone mentioned before about wanting a sensor to detect this, well, there is one on our cars (at least on the newer ones), it is called a knock sensor. If this sensor senses knock, which it will long before you will be able to hear it, it pulls timing. The probleme is that it can only pull so much timing.
This is only in the DOHC engines, according to the Haynes Manual for the 99+ Mustangs.mrpositraction said:And someone mentioned before about wanting a sensor to detect this, well, there is one on our cars (at least on the newer ones), it is called a knock sensor. If this sensor senses knock, which it will long before you will be able to hear it, it pulls timing. The probleme is that it can only pull so much timing.
propellerhead said:This is only in the DOHC engines, according to the Haynes Manual for the 99+ Mustangs.
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