92 z28

Latly when driving my 89 formula 305 tbi the oil pressure is very low it is not much over 15 at idle. what is causing this what can i do to fix it

iroc22

Try replacing the oil pressure sensor, located just above the oil filter.

TBI305Camaro

my lo3 would drop to 10psi. Im not sure if the sensor was bad or the pump itself...oh well i pulled the lo3.

:hail: the 5.7

1MEAN92RS

definatly replace the sensor (providing you've checked your oil level lately ). Sorry, couldn't resist the chance to be a smart@ss. When mine went bad it read next to nothing on the guage. I got my new one at Napa for $38 if I remember corectly. Prolly would have been cheaper at Advance or Autozone, but the guys at Napa never give me the run-around.

TBI89Formula

yea, my Lo3 firebird is doing the exact same thing, starting yesterday. Start the car 35, drive the car 10 min. 15, stop at a traffic light 0!!!!!!!!!!!!!!
I hope that sensor is the problem, I still owe $1800 on the car and cant afford 4 her to break!

spitz74

Be careful when you buy the oil pressure sending unit. There are two types: a long and a short version. If your car requires the long version, the short one will not clear the lip for the oil pan. I ran into this problem when Advanced Auto Parts accidently gave me the wrong part the first time (Not a complaint about them. I have been generally very happy with their service).

1MEAN92RS

The short one is for '86 and earlier cars that needed one for the idiot light as well. The "short" version screws into the block at the back of the manifold (clearance was not an issue there), but we are talking about a '92 here so he won't have that one.

92 z28

just to clarify this with everyone, my friend was over my house and he put this post up not realizing he was signed in under my name. he has a 89 firebird l03. his name is firebirdpl if you care. thanks