Bosch KE Toggle Switch Throttle Action Problem Returned

Please see the BOSCH KE thread for further details.

The weather was damp and cool again, which I think is related to this problem.

Have a great day,

Larry - if the rotor and cap are new - quite possibly the coil is shorting out from the moisture. It cannot be a sparkplug wire as all cylinders are affected. Meter the wire from the coil to the cap as a precaution and run the motor in a dark spot with the hood up looking for stray HV when it is damp out and acting up. See if it will act up by increasing the throttle from under the hood and look for stray HV when it occurs. I would hedge towards the coil however. It may meter good on the primary, but could be jumping the HV internally because of moisture. Check the coil for any cracks in the coating that could allow moisture in. Let us know when you find it.

It does indeed look like I will have to replace the coil as there is really no other way to eliminate it. Looking under the hood in the dark will do nothing, because it does not fail except under load at part throttle.

What keeps me wondering about this is that when it does not make part throttle power, I have to put the throttle ABSOLUTELY on the floor before it catches. Not 1/8" from the floor, but on the FLOOR. I think there is a full throttle switch, maybe as part of the throttle potentiometer.

Again, this morning, it exhibited more evidence of this being a damp air related problem. It ran good for about the first fifty miles, then I got into a heavy fog for about 30 miles. This was one of those 45 MPH type fogs. It acted up all the way through the fog, then cleared up after I got out of the fog, stopped the car to get gas and restarted it.

Have a great day,