Hey all,
so as the title says, I'm having oil pressure problems on my 1j. On the highway at 3-4k rpm the oil pressure wouldn't go above 20psi on the stock gauge. Never had a problem in my old shell. So i stopped driving it. I got an aftermarket oil pressure gauge and sending unit. Installed it and started it up. On cold start it read 38psi. So I calmed down I let it warm up. Slowly revved it to 2500 rpm and held it there. It seemed ok so I bumped it to 4000 rpm and held it. It all seemed fine so o let it rest and idle. Went down to 14 psi. Then dropped to 10 psi (at idle) so I was too worried. Then I let it idle for a bit longer was about to turn it off, when I looked at the gauge there was barely any oil pressure.(like 1-2 psi) The car was in the air so I checked for noises but nothing. So I turned it off. Then I thought the motor was sitting for a while so a friend and I thought maybe an oil change might help. Next day did an oil change, on cold start barely 20 psi. Revved it to see if it would go higher but wouldn't go above 20 psi.
Does anyone have anyother ideas before I go pulling th motor to change the oil pump and bearings? Cause I'm out of ideas especially since oil pressure problems are rare with 1jz's. Thanks in advance!:1zhelp:
so as the title says, I'm having oil pressure problems on my 1j. On the highway at 3-4k rpm the oil pressure wouldn't go above 20psi on the stock gauge. Never had a problem in my old shell. So i stopped driving it. I got an aftermarket oil pressure gauge and sending unit. Installed it and started it up. On cold start it read 38psi. So I calmed down I let it warm up. Slowly revved it to 2500 rpm and held it there. It seemed ok so I bumped it to 4000 rpm and held it. It all seemed fine so o let it rest and idle. Went down to 14 psi. Then dropped to 10 psi (at idle) so I was too worried. Then I let it idle for a bit longer was about to turn it off, when I looked at the gauge there was barely any oil pressure.(like 1-2 psi) The car was in the air so I checked for noises but nothing. So I turned it off. Then I thought the motor was sitting for a while so a friend and I thought maybe an oil change might help. Next day did an oil change, on cold start barely 20 psi. Revved it to see if it would go higher but wouldn't go above 20 psi.
Does anyone have anyother ideas before I go pulling th motor to change the oil pump and bearings? Cause I'm out of ideas especially since oil pressure problems are rare with 1jz's. Thanks in advance!:1zhelp:
