Hot Engine, No oil pressure reading

[meshow99]

'89 5.0 'loses' oil pressure at idle when hot. This doesnt happen when cold or warm, only fully hot. If i feather the throttle, the pressure guage raises to normal again.

I am (obviously) not willing to let it idle for any period of time incase I truly am losing pressure, so does anyone know how I can verify whether or not I am? I have changed the pressure sending unit already. Any suggestions welcome.

thanks
jay

 

[LiquidGT]

You might want to try an aftermarket oil pressure gauge, even the Sunpro gauges you get from the parts store work 100x better. The factory gauges aren't even suited for a Power Wheels, most people put water temp and oil pressure gauges in their fox somewhere.

 

[thebullschmidt]

what kinna oil u runn in it? weight and brand j/w