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i know this thread is old news but i finally got around to changing the oil pressure sending unit (bitch was in there tight) and that fixed it. pressure is still on the low side though. Im hoping that a dose of seafoam and an oil change will fix that.
instead of seafoaming it, ive heard a lot of people just draining a liter of oil from the pan, and adding a liter of diesel, driving the egnine for about 30 min, and then doing an oil change. apparently it cleans everything right up, and its cheaper than a bottle of seafoam. im gunna test it on mine this weekend.