|
Does anyone have a PermaTune box that has these two resistors intact?
My ignition transformer seems to be okay. My terminals are labelled A, 4, & 1. The resistance readings are: A to 1 = 0.85 ohms, A to 4 = 703 ohms, and all contacts read open to ground.
This is good information; about cleaning the ground cables from the engine/transmission. Thank you.
Let me know if I'm way off on this, because I don't see how to get a ground loop without some catastrophic failure; for instance, the coils of the ignition transformer shorting across.
As I said earlier, I have removed the electronics, the mounting panel, and the cables from the driver's side of the engine compartment. The LT side of the ignition system is isolated from ground, mounted on pretty substancial rubber cushions, and the ground terminal has the shields of two wires landed there. As I was removing the electronics; I thought that since Porsche was a performance minded company, that the reason for isolating the ignition system from ground, was to isolate any interferance from chassis ground away from the ignition system. I don't believe that the Porsche engineers were concerned with radio reception. Now the HT side of the ignition system, the secondary side of the ignition transformer to the spark plugs runs at 20k to 25k volts. So, the plug wire shields and ignition transformer case is grounded at chassis ground. Can you tell me the path that would lead a voltage spike from chassis ground to the LT side of the ignition system?
|