1 No Current at Injectors Sun May 20, 2012 7:10 am
roddaw
New member
Hello. I have just acquired a 1984, 24,000 mile K100. It broke down on the previous owner, since when it has been standing for a few years. The problem seems to be at the injectors, which aren't getting any current. The injector relay opens and closes ok, but there doesn't seem to be any current getting to pins 30 and the two marked 87. In fact, when I tried testing the resistance across the wires to pins 30 and the two marked 87, with the relay removed, one of the 87s showed no resistance, but the other shot up - far higher than just touching the two probes together. This stopped happening when I removed the temp sensing switch unit, also when I removed fuse no. 6. What can it all mean? My last experience with motorcycles was a 1976 Triumph Tiger, so the BMW is all too weird and sophisticated for me. My Haynes manual simply says I should replace anything suspect - without, as usual, giving any hint of possible symptoms - but the cost of some of the components, like the fuel injection control unit, and even the temp sensor switch, make this a bit prohibitive.
I've checked the water temperature sensor, and it seems ok - the resistance is the same on both pins, and high but not short-out high.
Any help, suggestions, or names of places that sell cheap or second-hand parts gratefully received.
Thanks.
I've checked the water temperature sensor, and it seems ok - the resistance is the same on both pins, and high but not short-out high.
Any help, suggestions, or names of places that sell cheap or second-hand parts gratefully received.
Thanks.