Thread: trobble with a 91 3800

Ok so here is the story. my buddy has a 91 Buick la sable with a 3800 in it and the last time I rode with him he pointed out a couple of things to me that he was having trouble with since he knew I have pretty much the same engine as him. the first is no big deal and I can help him fix that no problem since its just his low coolant level light but the other one is what I don't understand. his old pressure gauge moves around a lot. sometimes it sits were its supposed to but most of the time it just cranks way up and berries its self. what I'm wondering is if it is just a sensor going bad or what. I don't think he has anything mechanically going bad because it runs really well for how old it is. like I said its a 91 sable and I think it has around 150k on her. what do you guys think

sounds similar to my 1991 Olds Eighty-Eight, the oil pressure guage was always maxed out but never any problems with the engine. So I just let it be.

sounds like either the sensor or the wire that connects the gauge to the sensor check both, lol

have any idea where thats at?

Originally Posted by kjohnson

have any idea where thats at?

Probally right by the oil filter.

its probably a bad sensor, mine maxed out when the sensor went bad. Just get an aftermarket oil psi gauge.

Try looking for it in the same spot ours are