jc98ss

iTrader: (13)

I found a possible dailly driver 99 LS1 that loses oil pressure after a few minutes of driving.....it doesn't smoke or have any knocks and the car currently has 113,000 miles on it.....what all could be wrong with it?......seems like an easy fix, i know i could slap a new oil pump in it in about three hours, but before i try to buy it, what else could it be other than the oil pump?

jc98ss

iTrader: (13)

also, i don't know yet if the car is modded, i'm assuming it's all stock

01ssreda4

iTrader: (96)

You need to verify pressure loss with a mechanical gauge.

dr_whigham

iTrader: (49)

Agreed. I had this issue with my 97 SS. Mechanical, it was fine. Replaced the Oil Pressure Sending Unit, and all was well.

Talk about "pucker-factor" seeing your OP at zero.....

vettenuts

iTrader: (4)

I wouldn't buy the car unless you knew it was the sensor. If the oil pump I would personally walk since you don't know how it was driven and if pressure dropped whether damage occurred.

jc98ss

iTrader: (13)

i hear ya......i was thinking this very thing last night......the ad is no longer on craigslist so it's a no go anyways......thanks

NotTyler

I bought this car today lol. Small world huh?

NBM-LS1

iTrader: (7)

Wether you or him. Mechanically check the ol pressure.

NotTyler

Definately.

There is no motor noise or smoking so idk. It seems to idle and rev ok, didnt really get a chance to drive it much yet because it needs 2 tires. While on the throttle the oil pressure looks ok, but when you let out it drops.

I will keep my fingers crossed that it is something easy like a new sensor, but I'm prepared for the worse..

dr_whigham

iTrader: (49)

While on throttle the pressure is good, let off the gas and it drops....

Sounds like your pick up tube is not connected or sealed right. Drop the pan.

MPFD

iTrader: (5)

Change the oil and see if it helps. I got my oil changed in my 5.0 one day at a pennzoil lube center when I was in college. I forgot to specify on the oil and by the time I got home the oil pressure would drop to zero when ever I pushed in the clutch. I took it back and had them drain the pennzoil out of it and put in Valvoline and never had the problem again.

Damian

iTrader: (89)

I was going to buy that car. Looks like it's already gone.

NotTyler

Cleaned it up a little and put some 20w-50 in it today. Still not sure if that helped yet, I havn't had a chance to check and see if the guage is right.