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Message: <blockquote data-quote="cobrajeff96" data-source="post: 1508196" data-attributes="member: 29141">Yea, could be a corroded ground that gets intermittent connection or just not a very good ground. The aftermarket gauge you have I'm guessing is a two-pin connector, yes? If it grounds by its own threads then you have to make sure the sandwhich plate has a ground path to chassis or direct to battery (-). Or if one of the pins on the sensor's connector itself possibly is a ground pin and maybe its continuity is not that great.But 25psi is an acceptable oil pressure especially as the oil warms up, getting thinner, and then you might also have to take into account that the galley inside the sandwhich plate that the sensor threads into might create a pressure drop due to an increase in capacity in that particular space. No telling how it looks inside there and if the manufacturer of this thing took that into account. Typically the lines going to a sandwhich plate are at least 1/2" in inside diameter or even 5/8" so if the sensor is located within that volume then there is a pressure drop right there. And typically the OEM sensors are located right on the oil filter housing and the orifice size matches that sensor inlet in order to preserve the overall volume for uniformity and accurate readings.But start with grounds. A lot of electrical demons can be sorted just by inspecting/cleaning the ground path from engine to frame or any other ground in the engine bay.</blockquote>