Recently the oil pressure gauge in my 92 GMC (350 efi) has been acting up,
or the oil pressure itself has been acting up. Here is what's happening:
After driving for a length of time (30 mins or greater) the oil pressure
gauge will fluctuate. If the gauge reads low when I stop and turn the
engine off you can smell a hot smell, if the gauge reads hi or even normal
when its turned off there is no smell.
Where and how would I go about testing the actual oil pressure. ???