Well i have a 1986 trans am tpi, car sat from october till now. and i live in northeast PA where the winter months are cold. Started the car occasionally like 3 times threw out the winter i didnt look at the oil pressure then. The oil pressure was fine when i stoped driving it, now its in the high 40s 50s and some times goes past 60. any suggestions on what cause this?? im thinking clogged oil galeries from the cold and sitting

 

I'd say a bad gauge sender is the cause of the high
reading

 

No it could be that its cold and oil is thicker when its cold have u tried and let it warm up at engine temp and check. It should drop back down. Mine since i live in ks runs lil over 60lbs when its cold when its normal temp it runs around mid 30s

 

Try changing your oil first as sitting is still bad on oil. Also is it that high after the car warms up or when you first start it?

 

The pressure is that high even when its warm it goes over 60 and goes back and forth right after i put the car from drive to park. and i just changed the oil not eve 2,000 mils before i put the car away and it was 5w 30. And after its warm the lowest it will run is low 50s

 

I would try changing the oil still. Just from my experience the oil will go bad from sitting especially if its a lower grade oil like Pennzoil. just my

 

alrighty will do hopefully it is bad oil

 

Hopefully that's it. Keep us updated.

 

I agree. Oil change first, if that dosent fix it, change the sender. They are pretty cheap and not hard to replace.

 

I am having the same problem. I bought my car after sitting in a garage for 14 years. When the car is cold or warm it runs at 60 psi. It drops to 30 psi when I stop at a light. I have been through several oil changes so i do not believe its bad oil. Some people are saying to replace the sending unit? I dont know much about cars and i dont see it in my Hayes book. Is that the silver canister looking thing above the oil filter?

 

yes

 

I think he's talking about the oil cooler.