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i don't know but i have a 88 f-150 with a 4.9 w about 125000 miles on it and it does the same thing rides just to left of the n in normal. i spoke to an employer at a Ford dealership and he said that it was nothing to worry about. he said it was just a bad sending unitand the gauges are just idiot gauges and as long as there is some needle movement in the gauge than there is enough oil pressure. that's why they just have the big "normal" area on the gauge and no acual numbers to compensate when a sending unit is putting out a little more or less volts than it should be. the needle remains in the normal area. but is long as the needle moves at least in the normal range there is nothing to worry about. this coming from from a ford dealership mechanic

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โˆ™ 2011-09-13 22:24:07
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Q: What causes oil pressure gauge on an 89 f150 49 6-cylinder to ride on the left side of N in normal range is it bad any suggestions engine has 250000 miles runs great?
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