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Reading low oil pressure on gauge

 
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Old 19 Jun 2018, 03:23 pm
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Default Reading low oil pressure on gauge

2003 PT Turbo, 140k miles, reading 5 psi in idle, driving 15-30 psi. What is the normal pressure for these motors to run? Could my turbo oil feed lines be coked causing the drop? Thanks in advance.
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Old 19 Jun 2018, 03:52 pm
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Default Re: Reading low oil pressure on gauge

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Originally Posted by kcabe1 View Post
2003 PT Turbo, 140k miles, reading 5 psi in idle, driving 15-30 psi. What is the normal pressure for these motors to run? Could my turbo oil feed lines be coked causing the drop? Thanks in advance.
readings should be:

at curb idle: 4 psi minimum
3000 rpm 25 to 80 psi

What weight oil are you using?
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Old 19 Jun 2018, 04:08 pm
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Default Re: Reading low oil pressure on gauge

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Originally Posted by kcabe1 View Post
2003 PT Turbo, 140k miles, reading 5 psi in idle, driving 15-30 psi. What is the normal pressure for these motors to run? Could my turbo oil feed lines be coked causing the drop? Thanks in advance.
The turbo line alone should not do this. The best 1st step is to install a temporary aftermarket oil gauge to see if you get the same number. However, an easier first step might be to simply do an oil change with 5W30 and a new filter.

If that doesn't fix it, consider either the temporary oil gauge to just change out the factory oil sending unit. The cost and the installation difficulty of installing a temporary gauge or just replacing the sending unit are usually about the same. And with either you will get a degree of conformation for true low oil pressure if it doesn't work. But again, try the oil change first.
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Old 19 Jun 2018, 05:04 pm
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Default Re: Reading low oil pressure on gauge

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Is the low oil pressure issue on the engine that you had the bearing issues?
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Old 19 Jun 2018, 07:08 pm
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Default Re: Reading low oil pressure on gauge

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Originally Posted by ptcruisersteve View Post
Is the low oil pressure issue on the engine that you had the bearing issues?
Good catch, Steve.

If this is the same car, we may have already covered some of this ground. For everyone else, here's a link to that thread:

Possible blown motor help!!!
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Old 20 Jun 2018, 01:20 am
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Default Re: Reading low oil pressure on gauge

Idle oil pressure for my 2003 GT is 60-80 psi and highway pressure is usually 80-100 . Cold start engine oil pressure is always over 100 psi at idle. I'm using AMS oil Signature series 10W30 with a WIX filter.

Either your gauge is out of calibration, or you're taking the measurement in the wrong place.

I removed the oil pressure switch from its existing location and installed the oil pressure sender in its place.
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2003 GT M/T in Onyx Green Pearl on Michelin Pilot Sport AS 3 Plus Tires 205/50ZR17. Dark Slate Gray Interior. OEM cargo net, parcel shelf, slush mats and trunk protector, mud flaps, mopar subwoofer. Platinum edition pedals, Neon SX 2.0 steering wheel with black+grey wrapped leather cover. Generic lowering springs, KYB gas shocks, Valeo solid flywheel conversion and clutch kit. Urethane insert engine mounts. Energy suspension full body urethane bushing kit. Chrysler premium front speakers, Jenson 6x9 rears. Boston Audio 4x55W amp. Panasonic head unit with xtenzi bluetooth. 300W AC power inverter. Escort 360max and Escort Shifter ZR4, dual front+rear dash camera. stage 1 blow off valve and syked tune computer . Boost and oil pressure gauges with Turbo-Timer. Needswings 3" exhaust elbow, Electric valve actuated Y-pipe with catalytic converter. To do: coilovers, 2step controller, quaife diff, Air-Fuel Meter
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Old 20 Jun 2018, 08:07 am
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Default Re: Reading low oil pressure on gauge

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Originally Posted by _PTGT03 View Post
Idle oil pressure for my 2003 GT is 60-80 psi and highway pressure is usually 80-100 . Cold start engine oil pressure is always over 100 psi at idle. I'm using AMS oil Signature series 10W30 with a WIX filter.

Either your gauge is out of calibration, or you're taking the measurement in the wrong place.

I removed the oil pressure switch from its existing location and installed the oil pressure sender in its place.
I'd lean towards your having these problems. That sounds crazy high.
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Old 21 Jun 2018, 12:18 am
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Default Re: Reading low oil pressure on gauge

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Originally Posted by Fk5 View Post
I'd lean towards your having these problems. That sounds crazy high.
No, it's correct. Specification oil pressure at 3,000 RPM is 25-80 PSI .

Specification oil pressure at idle speed however is 4psi, but I'm doubting that as accurate, I've never seen my oil pressure at idle lower than 40.
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2003 GT M/T in Onyx Green Pearl on Michelin Pilot Sport AS 3 Plus Tires 205/50ZR17. Dark Slate Gray Interior. OEM cargo net, parcel shelf, slush mats and trunk protector, mud flaps, mopar subwoofer. Platinum edition pedals, Neon SX 2.0 steering wheel with black+grey wrapped leather cover. Generic lowering springs, KYB gas shocks, Valeo solid flywheel conversion and clutch kit. Urethane insert engine mounts. Energy suspension full body urethane bushing kit. Chrysler premium front speakers, Jenson 6x9 rears. Boston Audio 4x55W amp. Panasonic head unit with xtenzi bluetooth. 300W AC power inverter. Escort 360max and Escort Shifter ZR4, dual front+rear dash camera. stage 1 blow off valve and syked tune computer . Boost and oil pressure gauges with Turbo-Timer. Needswings 3" exhaust elbow, Electric valve actuated Y-pipe with catalytic converter. To do: coilovers, 2step controller, quaife diff, Air-Fuel Meter
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