hello everyone, i have an issue with my 20B when the engine when is warm up the oil presser drop down to 15psi it goes up when i step on the gas pedal.
is a new oil pump. is this normal? what can i do to fix this issue.

 

Depending on oil viscosity, 15 psi at idle is likely OK. The critical measurement is ~60 psi at 3000 RPM warm. This is with a 13B, so your 20B may be somewhat different.

 

How are you measuring oil pressure? Stock sender is flaky after a number of years, a new one will do fine but if it's a stock sender and unknown age that could be your problem.

Dale

 

I have haltech elite 2500.

 

Are you using the stock gauge or reading through an aftermarket sensor that is wired into the ECU?

The stock oil pressure gauge circuit operates independently, it is not wired through the ECU.

 

I've cleaned the OE pressure-sender orifice successfully with carb-clean several times to get it to read properly. I still have a new one that's been in the garage for ~15 years waiting to be installed if I need it.