Cranking but no oil pressure on the gauge.

[suprafredde]

Hi.

Cranking the engine with sparkplugs out.
Gauge stays at 0.
Grounding the wire and it slowly moves toward max pressure.
Ohming the sender shows infinate resistance.
When cranking about 1300ohms.
I have oil coming out of the turbo feed line.
And oil on the camshafts so there is oil flow.

So the question is fire her up or get a second gauge to check for pressure?
Is there a chart somewhere that translates sender ohms to psi?

suprafredde

 

[Supracentral]

The procedure is located in the TSRM on pages BE-42 and BE-43:

Oil Pressure Gauge Diagnosis

1. Inspect Receiver Gauge Operation
   
   
   
   1. Disconnect the connector from the sender
   2. Turn on ignition, gauge should move to the low position.
   3. Ground the terminal on the wire harness side through a 3.4 watt test bulb. Check that the gauge moves to the high side.
2. Measure gauge resistance
   
   
   1. Measure across the two terminals of the gauge
   2. Result should be 42 ohms - if not - replace gauge
3. Inspect sending unit
   
   
   1. Disconnect connector from gauge.
   2. Apply battery voltage to gauge connector through 3.4 watt test bulb.
   3. Check that bulb does not light when engine is stopped
   4. Bulb should flash when engine is running. Bulb should flash more rapidly with higher engine speed.

---

As for a chart that shows how the sender output translates to PSI, If it is out there, I've never seen it.

If you're in doubt, you should pick up a decent quality mechanical gauge for testing like this, IMO.

 

[suprafredde]

Thanx alot for the info there supracentral!
Cant figure out why I didnt look in the BE section, problem is solved.
Did the bulb to meter test and I guess it didnt like sitting at 0 for almost 3 years...
Luckily I had another cluster so out went the old and in with the working replacement.

suprafredde

 

[Nick M]

Don't forget that 200-250 rpm won't provide much flow from the pump.