I have a 95 chev 3500 w/ 454 that i use as a plow truck. at start up the guage says i have 20 lbs pressure, but when warm and idle, i have about 2 lbs of pressure and about 10 on the road, I'm using 10w40 oil, there's no leaks and it's about 2 degrees outside. I've plowed with it for about the lst 3 days striaght with the intent of go til it blows. But what are the odds of it just being a sending unit? or something else? Please help!!!
2007-12-06 05:06:02 · 5 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
Sending units are cheap and easy to replace. Also most auto parts stores have mechanical gauges, which are fairly cheap ($10 -20)and quite accurate. They just screw in in place of the sending unit and will give you a real quick and accurate reading of your trucks oil pressure. I use this method all the time on the old Mustangs I work on to see what the oil pressure really is. The electrical gauges usually weren't that accurate, from the factory, and over the years the senders, the gauges and the gauge constant voltage regulators change. All of this contributes to an even greater inaccuracy.
2007-12-06 05:16:34 · answer #1 · answered by mustanger 7 · 0⤊ 0⤋
If the truck is running fine then yes, it's absolutely the oil pressure sending unit or less likely a bad connection on the dash. This is very common on 90's Chevy trucks, from the 1500 to the 3500.
It's an extremely cheap and easy part to replace. It should run a few bucks at most auto parts stores and will take you 15-20 minutes to install (if you can maneuver yourself properly).
If the vehicle is running badly, sluggish, rough idle/acceleration, any type of noise, etc then run until she blows if you like or get it checked out.
Again, there's a 99% change you've got a failing sending unit, might even just be loose/clogged. Pull it out and look at it (should be towards the back of the motor) and replace...should take care of the problem.
Hope this helps!
2007-12-06 13:16:19 · answer #2 · answered by mrharris32 4 · 0⤊ 0⤋
if its a high milage engine it could just need some new bearings replace the sending unit an see if no change hope it makes it to summer an you can rebuild it
2007-12-06 17:53:52 · answer #3 · answered by nikipoo 4 · 0⤊ 0⤋
go to the parts store and buy a good oil pressure gauge and install it and then you will know for sure what's going on.
2007-12-06 19:58:17 · answer #4 · answered by mister ss 7 · 0⤊ 0⤋
I would say your oil pump might be going bad
I would switch to 15w40 oil
2007-12-06 13:15:54 · answer #5 · answered by jon s 4 · 0⤊ 0⤋