I have an 84 S10 P/U 2.8 L V6. My oil pressure gauge reads at 78 psi once I start it and when I hit the gas it jumps to 79-80 and stays there. Every o.ce in a while it goes down to about 75. What's my problem and how do I fix it. Oh yeah my oldie got 230,000 miles on it. No leaks.

SOURCE: oil pressure gauge stays at top, about 80 psi, is this normal

80 is on the high side for those... possibly a sending unit issue

SOURCE: when push gas pedal, oil pressure goes up

have you oil pressure sending unit checke/replaced

SOURCE: oil pressure gauge goes to 80 psi when the truck key is turned on

chances are your sending unit is not bad. These dashes have had alot of problems with stepper motors failing in the instrument cluster. does it go to zero when key is off? is it erratic? changes where it sits when running and when off? These are all problems within the cluster itself. It is not cheap to take this to the dealer. THey will want to replace the cluster. these clusters can be repaired for half the cost if you know where to go. Not sure yet what the rules are on here but i can repair these for about 325 verses over 600 from dealer and then reproggramming costs! One other note. Chevy has a recall on these! call you local dealer and ask what the criteria is for the recall. You may be able to get it repaired for free if you meet the time frame and mileage requirements.

SOURCE: low oil pressure 93 GMC P/U w/350 motor w/205,000 miles gauge

While engine is running, open the cover where you add oil to engine and see if you see a good flow of oil, if good flow, could be as easy as replacing oil sending sensor. got to realize that if poor maintenance history your engine may not be building enough pressure at iddle to move your hydraulic operated valves, only when you rev it up it will pump enough to run smooth. if running engine too long, you may cause more damage to other engine components such as crankshaft and cam shaft bearings. if you can spare a few bucks, have a good mechanic check your oil pressure with a mechanical gauge. another cheap option is to replace oil pump. last resort if you love your truck as much as we do,replace engine or rebuild it. At 205,000 this is a normal symptom, other than timing chain problems, most engines don't make it that far. hope this helps!

SOURCE: oil pressure gauge is reading 80 psi. I had the

The oil sending unit is located on the engine block behind the drivers cylinder head area.You have to climb up on the motor to see it cause it is hard to see behind the wiring harness.You may also want to purchase a new sending unit because it is very long and you might need to buy the sending unit socket to replace it.Hope this helps.Good luck.