vortecfcar
May 30th, 2008, 05:23 AM
Hey guys,
Trying to tune an 8.1. With the stock file it's showing significant knock retard. There is no audible pinging.
The knock retard follows RPM to a T, they correlate perfectly. The truck doesn't have any after market parts on it whatsoever (headers ect.). I tried to disable the knock system in the tune so I could drive it an listen for knock. Still retards the same amount of timing.
I'm stumped, are there any other tests I can run to see if the knock sensors are bad, or is anyone aware of what I'm missing in the tune to disable KR.
I've attached the scan and tune file.
Thanks,
Nick
Trying to tune an 8.1. With the stock file it's showing significant knock retard. There is no audible pinging.
The knock retard follows RPM to a T, they correlate perfectly. The truck doesn't have any after market parts on it whatsoever (headers ect.). I tried to disable the knock system in the tune so I could drive it an listen for knock. Still retards the same amount of timing.
I'm stumped, are there any other tests I can run to see if the knock sensors are bad, or is anyone aware of what I'm missing in the tune to disable KR.
I've attached the scan and tune file.
Thanks,
Nick