Mark
FIATFREAK
One of my Scorpions has developed an issue with little or no oil pressure at startup. It was sporatic at first, happening after the car sat for several hours; but not always. It got to the point when once the pressure didn't come up. I was able to prime the pump by removing the spur gear and then it ran fine. However, the problem persisted. So I dropped the pan and disassembled the pump, but everything checked out fine. I refilled it with a 5w-30 instead of the 20W-50 I have always run, thinking that might change the behavior. At first it seemed to, but the other day the oil light came on at a stop light within only a few minutes of travel. So, I devised a mechanical gauge to verify the low pressure and it confirmed only a few pounds at idle. So, once again I dropped the pan and replaced the pump with a known good pump. Still no pressure. My next and last step prior to pulling the engine is to prime the pump as before. Any ideas what might be happening?