Oil Pressure Falls Under Boost

[TurboChrged93]

As my RPMs rise but under vacuum *no boost*, so does my oil pressure. Normal.

As my RPMs rise *with boost*, my oil pressure slightly falls. Abnormal.

Diagnosis?

This is all going from the stock gauge in the center, it never goes past straight up unless it's a cold start.

 

[Defiant]

Check the tightness of your pressure sender wire connection. And of course, since you've started noticing this, the effect will be exaggerated.

 

[TurboChrged93]

So you think it's nothing wrong with the condition of my motor... you believe it's a bad connection?

 

[Darksyne]

I would get a real gauge on there, even if it's just a mechanical cheapie that you run under your wiper for a few runs. The first step is positively confirming there's a problem

 

[Defiant]

So you think it's nothing wrong with the condition of my motor... you believe it's a bad connection?

Well, that's the first, best hope. And a fairly likely suspect on DSMs with their connectors out there in the breeze getting slapped around by the wind. But it is dicey to make diagnosis without touching stuff.