Zrated383

Hey...can you guys tell me where the oil pressuring sending unit is on an 1989 IROC-Z 350TPI? Thanks.

90rocz

Above the oil filer going into the block, sticking out toward the side of the car.

aklim

I believe it is a tube about an inch in diameter and about 3 in long with 2 wires coming out of it.

l_bilyk

mine is behind the distributor
but i think they changed that in 87 or 88 for vettes and the followin year for f-bodies

Dave89IROC

I have both on my 89, the one by the distributor is a sender for the gauge and the switch for the fuel pump, dont know what the other one is?

raul.garcia

My 88 350 TPI has the oil gauge sender to the right of the dizzy (driver's side,) the other sender located above the oil filter is an oil pressure switch call the "Fuel Pump Switch," if there's not sufficient oil pressure to keep the switch closed then when the fuel pump relay times out the fuel pump stop pumping.

90rocz

The sender for the gage is larger than the fuel pump cut-off switch. The FPCOS is usually on the back of the block near the intake, and the oil gage sender is the above the filter. The gage sender looks like a cylinder about 3" long and a little bigger around than a quarter.