 Logging, Looking for Knock |
 Dec 28 2005, 09:18 PM
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 Post Master  Group: Members Posts: 986 Joined: 7-July 04 From: Central Illinois Member No.: 318  |
OK, I have a logging solution now and can plot 2 properties at the same time. If I'm really searching for knock I record Ignition Timing Advance vs. what, Engine RPM? Air Flow Rate from MAF?
Anyone? Thanks! -------------------- ... she likes bein' forced ...
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Dec 29 2005, 08:31 AM
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 Post Master Group: Members Posts: 908 Joined: 7-October 03 From: Chillicothe, IL Member No.: 182 |
On an OBDII vehicle you do timing VS RPM. The timing should drop as boost comes on. Then rise up with RPM. If you use an AFC type device there should be more timing as you lean it out unless there is knock. If you take away airflow and there is less timing, then you are knocking. If your timing drops or stays contant you are probably knocking.
-------------------- GVR4 866/1000 = the perpetually broken car
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Posts in this topic
Kazz5 Logging, Looking for Knock Dec 28 2005, 09:18 PM
Kazz5 I have O2 voltage but no injector duty cycle readi... Dec 28 2005, 09:45 PM 99Spyder I am guessing that you do not have knock volts fro... Dec 28 2005, 10:16 PM Kazz5 "Long Term Fuel Trim-BX (up to 2) – indicates... Dec 28 2005, 10:25 PM 99Spyder Seems that if you were knocking then you would see... Dec 28 2005, 10:53 PM
Kazz5 First impression is the timing drops when I drop t... Dec 29 2005, 10:25 AM |
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