Electrical Check: Electrovalve

Partially disconnect wire 146A from the electrovalve without breaking electrical contact. Connect voltmeter to ground and to exposed terminal. Voltage should be equal to battery voltage. If not, check problem wire for shorts.
Disconnect wire 146 to the electrovalve. Connect a jumper wire in place of it on electrovalve. Ground other end of jumper wire several times. There should be a "clicking" sound from electrovalve each time jumper is grounded. If not, disconnect other wire from electrovalve. Connect leads of ohmmeter to terminals on electrovalve. Resistance should be about 40 ohms. If resistance is infinity or close to it, replace electrovalve.
NOTE: If electrovalve stays open all the time or is open outside of the 1300-3100 RPM limits and checks out OK, it may be necessary to replace electronic control box.