mcclure14

So my computer threw a code for knock #1. I replaced it and now my oil pressure gauge doesnt work. Could I have broken the oil pressure sender unit or possibly pinched/busted the small vaccum line that goes into it?

sjsingle1

iTrader: (1)

the OPSU does not use a vacuum line.....make sure the wire is clipped on it good.....if it is.......replace the OPSU

RARON455

iTrader: (35)

Yes you could have broke it, or it may not be clipped in tight, or you may have forgot to plug it in. Or you could have even pinched the wires in between the intake and head. its tough but lay on top of the engine and wiggle your hand back there, You will be able to feel it, see if its still screwed into the block, If it moves its broken, check the top where the pigtail clips in, start there, If no luck, Pull the intake.

ShevrolayZ28

iTrader: (4)

That's good advice given above. It's all too common to break it when removing or installing the intake. The brake booster vacuum line wraps around it...

HoLLo

iTrader: (17)

I tell everyone putting on an intake to remove the oil pressure sender from behind the intake before you take off the manifold. YES the sender can be removed without taking off the manifold, just needs a special oil pressure sensor socket, like $7 at the parts store. It ALWAYS breaks, it's just some flimsy plastic casing.