1998 4.6L Oil Pressure Fluctuating
#1
1998 4.6L Oil Pressure Fluctuating
1998 /4.6 oil pressure will not stay up .. runs 3/4 gauge then drops to 0 then back up.. could sludge be causing prob.? is there anything i can add to cranckcase like diesel and run parked and then change oil n filter..
Last edited by Purplehazeir; 12-30-2011 at 08:32 PM.
#3
+1, I think it's a bad sending unit (switch). Remember this is an idiot light type of gauge that either reads ZERO, or about 1/2 scale on the gauge when the sending unit (switch) closes. This normally happens
with about 7psi of oil pressure.
with about 7psi of oil pressure.
#6
when it zeros it starts multiple tapping from lifters or rocker arms or combo of both...i know it has sludge build up..i paid for new pump n pick screen bout 25,000 ago for same prob...it has round 170,000 on it other than that runs as smooth as a new one
#7
If your hearing tapping when the gauge reads near zero, then it's not the oil sender unit. That's real oil pressure drop. If you replaced the oil pump and are still having the same problem, then the pump isn't the problem. Have you tried running seafoam threw the oil?