pil pressure acting crazy 5.7 vortec
#1
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I have a 97 gmc seirra with the 5.7 I was driving my truck around today and noticed that the oil pressure gauge was jumping around a lot then on my way home the needle dropped below the 20 psi mark and the check gauge light came on at an idle as soon as I press the gas oil pressure climbs. It was a quart low so I filled it but that didn't seem to make a a difference. I let it cool down and starte it and let it idle up to operating temp the oil pressure is still jumping around a lot between 20 and 40 psi. I did replace the sensor a few months ago. Any ideas?
#4
TECH Resident
iTrader: (4)
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Yea, I would put a good mechanical gauge on it and see what's happening. I have seen a lot of aftermarket sending units go bad quickly. Don't buy a cheap aftermarket gauge, get a good autometer. You will probably have to get a t under the stock sender as most fuel pumps run on oil pressure.