Weird 99 LS1 Oil issue!
Thread Starter
Teching In
Joined: Apr 2008
Posts: 30
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Weird 99 LS1 Oil issue! Had the oil changed.
Took the car out for a cruise Saturday night never went over 2.5k RPMs.
Oil pressure starts to drop to 20 PSI at idle and fluctuate between 20-30 PSI. Next thing you know the guage bottoms out and check gauge light comes on.
I shut her down really quick.
Check under car no oil no smoke not even a smell of oil.
Let her sit start her up and the valve train is clicking as in not being lubed. The oil pressure stays at 45 PSI and eventually lube the valvetrain again and the clicking stops and the engine sounds quiet.
I park the car and leave her alone for the weekend.
Went out just now started her up and she runs just fine at 45 PSI at idle quiet as a mouse drive her around and oil fluctuates between 40-50PSI under 1.5 RPMs.
What the hell is up with this car?
Could it be the oil pump ready to croak? How could something mechanical give intermittent issues?
The guy who did the oil change not put enough or maybe too light of oil in her?
A crappy filter not installed correctly?
Took the car out for a cruise Saturday night never went over 2.5k RPMs.
Oil pressure starts to drop to 20 PSI at idle and fluctuate between 20-30 PSI. Next thing you know the guage bottoms out and check gauge light comes on.
I shut her down really quick.
Check under car no oil no smoke not even a smell of oil.
Let her sit start her up and the valve train is clicking as in not being lubed. The oil pressure stays at 45 PSI and eventually lube the valvetrain again and the clicking stops and the engine sounds quiet.
I park the car and leave her alone for the weekend.
Went out just now started her up and she runs just fine at 45 PSI at idle quiet as a mouse drive her around and oil fluctuates between 40-50PSI under 1.5 RPMs.
What the hell is up with this car?
Could it be the oil pump ready to croak? How could something mechanical give intermittent issues?
The guy who did the oil change not put enough or maybe too light of oil in her?
A crappy filter not installed correctly?
Thread Starter
Teching In
Joined: Apr 2008
Posts: 30
Likes: 0
Also upon further inspection of the engine bay I noticed this line is ripped and disconnected.
Could this be the culprit?
Last edited by kevamg; Mar 5, 2012 at 03:27 PM.
Teching In
Joined: Jul 2013
Posts: 16
Likes: 0
From: Steubenville, Ohio
Did you end up finding the problem? I am dealing with the same type of issue on my 99 ls1 trans am.
Here is my post:
https://ls1tech.com/forums/generatio...-problems.html
Here is my post:
https://ls1tech.com/forums/generatio...-problems.html
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