1997 f-150 oil pressure gauge bouncing
 

I have a 1997 F-150 I just purchased the oil pressure gauge goes up and down, when it idles the hand shows low, when I press on the gas it goes up to past middle and high. When the hand shows low the oil light comes on, it looks like maybe an oil temp light? Does anybody know what I should do?

1997 F-150 oil pressure gauge question
 

I have a 1997 F-150 I just purchased the oil pressure gauge goes up and down, when it idles the hand shows low, when I press on the gas it goes up to past middle and high. When the hand shows low the oil light comes on, it looks like maybe an oil temp light? Does anybody know what I should do?

The light is for low oil pressure. You may want to check the dipstick to see if there is enough oil in the truck.

oil pressure
 

i checked the oil its full

btw i checked the oil its full

Change the oil pressure sending unit. Sometimes they get clogged up and give false readings.

Then there are, perhaps, other mechanical issues causing the low pressure problem. There are some good mechanics on here and I am sure one of them will be able to make some good suggestions as to where to start looking for the problem.

Put a mechanical gauge on at give us the readings. The one you have is electric and subject to be wrong.

Sounds like the new pressure gauge is doing just fine. Pressure will increase with egine RPM. Problem is at idle. Is idle speed normal? Am hoping its not. With oil level normal the lite is warning you of low pressure. Is there any lifter noise when lite is on? Another question, what engine and how many miles?

If the oil pressure lamp is on when the engine idles and there's enough oil there are 2 ways- low viscosity oil e.g. 0W 30 SAE on summer, or you may have major engine problems. Could the engine be overheated?