Well, it only started doing this a little while back, but The oil pressure in my '89 L03 TBI 305 has been high. Starting out in the morning, my gauge is pegged out past 60, and it doesn't even try to go down! Later on as it warms up a lot, It'll go down to 45 or so, but when I barely get on it, It pegs out again, and stays up there past 60 even for a while after I've gotten off of the gas! My oil level is where it should be, I changed it not too long ago! I even checked the connections to my oil sending unit! Can anyone help?

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89 Firebird LO3
Open element, MSD blastercoil, ACCELL cap and rotor, Moroso 8mm Blue Max wires, #2 Rapidfires, straight pipes, and keyless entry.

 

I've heard of certain firebirds having high volume oil pumps so it wouldn't be a problem if that's the case. Sorry Dan, this probably didn't help much, but check the rpo codes and see if that's in there.

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85 Z28 (Soon to be GMPP 350 HO)
Headman Hedders and matching y-pipe, Edelbrock Performer, Ram Air, Accell cap and rotor, Accell Supercoil, Bosch 8mm wires, 160 stat, highflow Catco converter, absolutely no other smog equipment, B&M shift kit, Rapidfires, numerous carb mods, and flex-a-light fan.

"If you think education is expensive, try ignorance."-Ben Franklin

 

Whats the problem?


Mine always does that. When it is hot and at idle, it will be about 30psi, but on the highway it is 55psi+. When cold, it pegs past 60. I don't see a problem.

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"I used to have a handle on life, but then I used it as a plunger and broke it" -The Wave

ASE Master Tech + L1
Savannah, GA
'87 Trans Am-K&N,Cold air induction, SSM SFC, Flowmaster, 16" GTA rims.
'97 Bonneville SSE
About Me

 

I just thought my oil pressure was running real high. I know it will go up past 60 when your racing, but it just stays on up there and won't drop back down! Nothing has happened to my engine, so I don't know if anything is wrong or not!

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89 Firebird LO3
Open element, MSD blastercoil, ACCELL cap and rotor, Moroso 8mm Blue Max wires, #2 Rapidfires, straight pipes, and keyless entry.

 

Two things come to my mind: perhaps the gauge is inaccurate, and perhaps you oil filter is clogged, and now you are going thru the pump's bypass

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1983 Berlinetta LB9
1971 LeMans Sport conv.
1981 472 Regal

 

There is a releaf valve on the oil pump that is not opening up either the spring is bad or it is full of sludge, yuck, you might want to put some engine flush in and change the oil.

Morgan