I have an intermittent fault on the immobiliser circuit( I think) About once a week (now reducing) the fuel cut off solenoid actuates and the engine cuts out. I've made a temporary fix by taking a fused supply from the battery via a switch in the glove compt. This works but drains the battery if I forget to switch it off. Its a very strange fault there doesn't seem to be a pattern to it, i.e. low voltage, damp ect. The diagnostics don't show any fault or at least one that i can catch. The car has 175k on the clock Iv'e had it from new so it's in otherwise good condition. Anyone experienced this fault on a mk4 golf