Quote:
Originally Posted by Jeremy5848
Please explain what "goes to 0-3 bar when started" means. Do you mean that it ends up somewhere between 0 and 3 bar? or that (after being at 3 bar in position 1 – ACC) it drops to 0 and then goes up to 3 bar? or something else? I want to make sure I understand you, I've never had a W126 car.
Jeremy
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My personal guess on this one is that the OP gauge loses power when the starter circuit is engaged and shuts off all the accessories to provide every last bit of available current to the starter. The sensor's grounded out, it pegs to 3 any time the gauge has power, they hit the starter and it drops to zero, and then as soon as the voltage comes back it pegs again.
IF their gauge EVER reads anything while the engine is running (like a warm idle) besides a pegged 3, then I'm wrong.
Mine, for the record, stays fully at zero until the engine is running and has pressure.
EDIT: I just realized why this doesn't exactly make sense. The electrical OP gauges do not lose power under starting, because I just remembered that I can watch my starter bring the oil pressure up from zero before the engine ever starts firing on its own. So, I'm changing my guess to "wiring problem"
Sorry