Best Way to install a Oil Pressure Switch

[TTM]

Hey guys, what is the best way to install a OPS? The truck has never had it replaced (and I have never replaced one) and think it time. I have small fluttering, fish bite, problem only at 1100-1500 rpm and want to rule out the IP.

And just for my info what exactly does the ops do? I have a good idea but....

FSD just replaced (D-Tech), filter new, lift pump good, batteries and cables good, truck runs like a top outside that.

Thanks.

[JohnC]

The OPS powers the fuel lift pump while the engine is running.

The easiest way to swap it is with an OPS socket from Lisle and a long extension. the switch on your truck is located below the left head on the back of the block and points up and to the right.