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Question I have a 1990 Ford Ranger with a 4.0 liter engine - 85,000 on the odometer, but Ford put in a short block at 57,000. I have no oil pressure after the truck warms up. I have already replaced the oil pressure sending switch and installed a new oil pump. Still no oil pressure at idle and the service station has no clue as to their next move. Any suggestions would be greatly appreciated. Mary, Roseburg OR

Reply You did not mention having a manual oil pressure test and gauge circuit test as these tests would isolate either a gauge inaccuracy or an internal engine problem. Internal engine problems such as excess bearing clearance can cause low engine oil pressure. Angelo Silverado Auto Service