Erratic oil pressure

[Browncbr1]

Hey everyone.    I’ve got what appears to be erroneous oil pressure readings.   The OEM garwin oil pressure gauge is steady in the green, but the jpi gets erratic spikes.  
 

I have cleaned and re-terminated the connections at the sensor.  I looked for chaffed wires and made sure the db plug is secure in the back of the edm display. 
 

anyone have any ideas of other things I should check before dropping $300 on a new sensor?

 

[Ragsf15e]

11 hours ago, Browncbr1 said:

Hey everyone.    I’ve got what appears to be erroneous oil pressure readings.   The OEM garwin oil pressure gauge is steady in the green, but the jpi gets erratic spikes.  
 

I have cleaned and re-terminated the connections at the sensor.  I looked for chaffed wires and made sure the db plug is secure in the back of the edm display. 
 

anyone have any ideas of other things I should check before dropping $300 on a new sensor?

 

I had my jpi do that before too.  Mine was fluctuating +\-5psi though, not as bad as yours.  Eventually I installed a snubber just before the sensor and it stopped, however it could have just as likely been an air leak in the connection that was fixed when I installed the snubber.

[Browncbr1]

12 hours ago, Ragsf15e said:

I had my jpi do that before too.  Mine was fluctuating +\-5psi though, not as bad as yours.  Eventually I installed a snubber just before the sensor and it stopped, however it could have just as likely been an air leak in the connection that was fixed when I installed the snubber.

Thanks for the advice.  Yea, I should check the fittings a little closer.   Any recollection on which snubber fitting you used?

[Ragsf15e]

@Browncbr1
Yeah it’s an omega 1/8npt snubber for light oil.  I think if you Google that it’ll come up.  

Was it stable before or has it done this the whole time you had the jpi?

I talked to jpi and they said it probably wasn’t the sensor as they don’t die like that.  They suggested emi like some kind of bad ground or unshielded p lead.  However the snubber fixed it.  Like I said, it could just have been a connection got fixed when I installed the snubber.  The snubber is an npt fitting and the oil lines are flared, so you need an adapter on both sides.  1/8npt to 37 degree flare. 

 

[Browncbr1]

5 minutes ago, Ragsf15e said:

@Browncbr1
Yeah it’s an omega 1/8npt snubber for light oil.  I think if you Google that it’ll come up.  

Was it stable before or has it done this the whole time you had the jpi?

I talked to jpi and they said it probably wasn’t the sensor as they don’t die like that.  They suggested emi like some kind of bad ground or unshielded p lead.  However the snubber fixed it.  Like I said, it could just have been a connection got fixed when I installed the snubber.  The snubber is an npt fitting and the oil lines are flared, so you need an adapter on both sides.  1/8npt to 37 degree flare. 

 

Thanks man.  No, it never did this until a couple weeks ago.  It was always very stable before.  I think I’ll pull the oil hose, make sure it’s clear and put back together.  

[Ragsf15e]

10 minutes ago, Browncbr1 said:

Thanks man.  No, it never did this until a couple weeks ago.  It was always very stable before.  I think I’ll pull the oil hose, make sure it’s clear and put back together.  

Jpi also tried to help me with a software update that I did myself but it didn’t help.

Any npt fittings need pipe thread seal, but flare fittings don’t.  But look for nicks or bends in them.