Jaco Swanepoel wrote: >> I purchased and installed a Bosch Universal Lambda sensor. I connected >> the Signal Wire and the Negative to the EFI unit as per the EFI wiring >> diagram. The EFI unit only has two wires and the Lambda sensor has four >> (2 extra for the heater). Can I run power to the heater from the master >> switch or should I run it directly from the ignition switch?<<
I'm not sure what an EFI is, but I'm not sure you need a heater on your O2 sensor. I'd just buy the cheapo $30 "two wire" version that has no heater. The one you bought will probably work fine, but costs more. It's designed to be mounted further downstream so requires a heater for quicker warmup. I don't know how much current the heater draws, but I wouldn't want it running through my igntion switch, as you'd want that switch to be under utilized, not taxed to the limit. I'd leave the heater disconnected, myself. Mark Langford, Huntsville, Alabama see KR2S project N56ML at http://home.hiwaay.net/~langford email to N56ML "at" hiwaay.net -----
