tdiguy228
Member
My TDI 99.5 ran fine with occasional power loss (felt like no turbo) which came and went away. I drove car home one day and following morning no start. What's been done: Relay's 109 & 53 (645) ...What I've observed and measured: About 5 seconds after the ignition is turned on, the voltage at the glow plugs drops from 12 volts to 0 and the voltage at the shut off solenoid goes from 12 volts to 9 (which is not enough to hold the solenoid plunger), and at the same time you can hear a humming noise coming from the injection pump turn into an internal switch noise (not the shut-off sol). This happens consistently. The fault codes set are 16764- Glow plug/ heater and 17946-Fuel shut off Solenoid. All the readings make sense, but why is it all shutting down?? HELP