RF Ping

[David Mulvey]

> GM Australia has a service Bulletin out on the Holden Calibra (Made by
> Vauxhall), they for some reason didn't shield the knock wire on the Aussie
> cars (The Euro ones are!!), anyway, with a new shielded wire a drill and
> much loss of skin and 7 hours later you can fix the problem of 'intermittent
> performance loss'. Geez my ol' T/A's knock wire has splices, no shielding
> and running over things it shouldn't, Diacom rarely blinks an eye at
> knock... Makes me wonder.



The RF noise getting into the knock sensor wire: 

Would that cause a knock?

or 

Would that cause only a false indication of knock?

OR 

Would it keep the ESC from detecting a knock?
  There by not letting the computer do minor adjustments as you approach WOT eventually getting code 43.???


On my car I hear the knock at WOT around 3rd gear.  After the car finally gives me code 43 (service light comes on) if I continue to 
accelerate, the knock goes away and I get a slight boost of power to continue my acceleration. The cycle starts all over again if I 
approach WOT again.

Dave
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David Mulvey KD6BZN
Lancaster, CA
(661) 723-0352