I just bought my first f150 about 2 weeks ago. Its a 93 with the 5.0 extended cab, manual tranny, 2 wheel drive. 153k on motor. Needs a few odds and ends, so far ive done a starter, general tune up (plugs, wires, oil and air filter)
When i got the truck my oil pressure seemed a little low on the dash gage. My brother just got rid of his flairside with the 5.0 in it and he said it was about right when he looked at it. Today pressure dropped between the n and o. Shortly after the "check engine" light came on for about 5ish seconds then went off. Now i am no mechanic but i no enough to get by and this dosnt seem normal. Anyone have any ideas??
I will be throwing on a mechanical gage asap, what should the pressure read when hot??
The old rule of thumb is 10 psi per 1000 RPM. Most of my Fords have run about 50 psi and no lower than 25 psi. As stated above our oil pressure gauge is an indicator that is connected to a switch. When the oil pressure is above 6-7 psi the switch makes and it should show about 1/2. You can make the gauge functional by replacing the sender with a pre 87 one (302 may need an extension) and bypassing the gauge resistor with a wire. Oil pressure and the check engine light aren't connected unless the engine rpm dropped enough for the switch to open.
You have OBDI so you can pull the computer codes with a paper clip or jumper wire. Many sites have the directions and what the codes mean.
"Nelly Belle" 95 XLT SC SB 300 4x2 5 spd 244k
"If women don't find you handsome at least let them find you handy" Red Green