Originally Posted by OTRtech
The oil pressure guage should stay about the same place.Two things come to mind,
1 the guage is going bad
2 the alternator output is fluctuating.Maybe the regulator is going bad.This could be the reason for the underdash noise also.
As for the fan roar , that would be considered normal in cooler temps with a cold engine. It's the fan clutch loosening up after sitting .Many new vehicles even do it.
Thanks for the info on the fan. I thought it was normal for it to happen.
It made the noise again this morning while doing a left hand turn with the turn signal partially on. Sounds like it is coming from the steering column. I did notice when i put my 4 ways on that only the right one came on and then the left one followed a few blinks later. This occurred with the signal lights in the dash and the front flasher. My overdrive fuse was also blown, but I replaced that and it didn't blow when it happened this time. Not sure how long it was blown as I rarely turn it off.
Oil gauge was at 3/4 this morning where it usually always is and stayed there. I did take the needle off at one point when I changed my overlay. The alternator is only a few years old and there is no other electrical problems like no dimming lights while it occurs or anything like that nor does the charging gauge move, halfway all the time. Is the regulator replaceable? It is a higher output alternator that i installed. My belt does squel a bit so I wonder if the belt could be slipping and causing it. The squel does come from the alternator side of the engine. Sending unit can also be going even though I just replaced that a little while ago. This has been the first time it moved in a long time. And it has rained alot the past 4 days.