nullpointer

I am trouble shooting a 0 oil pressure issue with my 02 Z06. Yesterday the oil pressure was fine, today 0.

Replaced the oil filter and OPS with no results. I want to test the wires leading to the OPS to rule this out next.

Its a 3 wire connector, ground, 5v, and voltage from sending unit correct?

http://farm4.static.flickr.com/3486/...1f98b5d9_b.jpg

I tested the ground, its ok.

Next I would attach my meter to the ground and grey wire, key to accesory and I should see 5 volts, right?

nullpointer

Key On - Grey wire has 5 volts - this is good
Key On - Tan wire has 0 volts - this is good
Ground is good

Tested OPS with compressed air and key on - Gauge moved

Looks like my pump is the cause

IH8FORD

i wouold be checking the o ring at pump didnt you just put a cam in when doing the supercharger? ive seen the o ring get torn or move out of place many times.

nullpointer

Yep - but the pump made great pressure for 2 days. I'll order a new pump and when I tear it down the o-ring will be looked at. If I don't need the pump I can return it.