Question about 1991 Chevrolet C1500

1 Answer

I have a 91 chevy, 2wd with a 350. My oil pressure gauge reads 0 at idle and goes up to 30 when I get on it. Truck runs great no pings or knocks. Took off the valve cover, usually oil just trickles out of rockers in my past trucks, it was shootin out, actually got some on my exhaust manifold and fenderwell. Looks like I have great oil pressure, but gauge says otherwise, should I be worried?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Chevrolet Master
  • 6,982 Answers

Sounds like you have good pressure but would not hurt to put a mechanical gauge on it to verify that. Chances are that the sending unit is going bad or a passageway to it is obstructed. If pressure is good, change the sender and put some marvel oil in there to clean up the residue.

Posted on Feb 02, 2010

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

I have a 2003 ford ranger the oil pressure guage goes to hald way then 0 back to half way truck runs great with no problems


Check the plug first. Look at the tabs in the plugs. They should be touching from one side to the other. See a gap fix or replace the plug. If it looks good, Replace the oil sending unit.

Dec 18, 2015 | Ford Cars & Trucks

1 Answer

When stopped at a stop light my oil gauge goes down and my temperature gauge goes up on my 94 Chevy 1500 truck. I just changed the oil yesterday? What could it be?


Both issues could be normal to a degree. The engine temp would go up some when the truck stops moving, and the oil pressure would go down some when the engine returns to idle.
Are the two gauges reading out of normal range ?

Jun 26, 2013 | Cars & Trucks

2 Answers

I have a 2006 chevy silverado 5.3L..When in idle oil pressure gauge goes to 80 and when i accelerate ail pressure goes to zero ...is it the oil sending unit?


It could be the sending unit. If the truck is low on oil it will cause something similar. Be sure the oil level is topped up. The only way to be sure it so measure the actual oil pressure at the engine with a proper gauge..

May 07, 2011 | 2006 Chevrolet Silverado 1500 2WD

1 Answer

Okay now i have a 91 chevy c1500 w/ a 350 5.7 liter, 2wd. i am having oil pressure problems. tonight i put a new oil pump and screen on. new oil with Slick50 and oil filter the oil cooler has a new o-ring...


You need to have the oil pressure checked with a manual oil pressure gauge you may have a bad sending unit. If the you oil pressure is the same with the manual gauge then you have a oil pressure problem.

Feb 17, 2011 | 1991 Chevrolet C1500

1 Answer

Alrighty. I've asked this a few times before, I have more info now. CHEVY 350 K1500. 1993. Replaced intake gaskets, (bad oil leak) dropped a small amount of coolant in with oil while doing so. Changed oil...


how did you clean the gasket off of the head? if you used a sanding disc the grit will eat up the bearings. are you reading pressure with a mechanical gauge? you have replaced all bearings??

6 psi @ 1000 RPM
18 psi @ 2000 RPM
24 psi @ 4000 RPM
this is chevrolet specs on oil pressure in your truck so you are within the range.

describe your idle problem more and i will try and help you with that

Feb 02, 2011 | 1993 Chevrolet K1500

1 Answer

03 s-10 truck 4.3 ltr 124k miles ZR2 MODEL


First we would need to know when this occurs. Asuming the oil level is at the full mark!. If the pressure goes up during acceleration and down at idle when engine is fully warmed up, then this is normal. An engine requires 10 psi of oil pressure per 1,000 rpm ( ex. 20 psi at 2,000 rpm, 25 psi at 2,500 rpm, and so on ) . If the gauge is moving back and forth erratically at idle , i would say the gauge is bad. If it drops to 0 while accelerating I would say your oil pump is bad. If from time to time it seems to work and other times it seems not to work, I would say the oil pressure sending unit for the gauge is bad. If the pump failed you would start to here a Knocking noise from the engine in a short period of time. Use the above scenario's to narrow down what it may be.

Jul 23, 2010 | 2003 Chevrolet S-10

1 Answer

I have an 198 k5 blazer wth a 350 small block . it shows no oil pressure at idle but when i drive it or rev it up the oil pressure goes to 35-40 lbs of pressure . the engine sounds great no knocking or...


Sounds to me like your oil pump is bad, not pumping sufficient oil at low RPM's. If the gauge shows pressure when driving or revved, the sending unit is working

Apr 02, 2010 | 1991 Chevrolet S-10 Blazer

4 Answers

Oil pressure low when idling. When running engine


first check the oil level if its good then change the oil if you hav'nt done so all ready and add some LUCAS oil stablizer this may help alot if not then the oil pump is most likley going bad and needs to be replced before the engine lacks oil and cause the engine to seize.

Mar 14, 2010 | 2000 Chevrolet S-10

1 Answer

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!

Mar 01, 2010 | 1993 GMC Sierra K1500

2 Answers

Changed oil pressure switch,still no oil pressure


The fuel pump on that model runs through the oil pressure switch so that if the truck looses oil pressure,It kills power to the fuel pump to prevent engine damage.you need to find the cause of the low oil pressure reading(possibly a bad oil switch).That would be the cheapest place to start,or have it checked with a mechanical gauge.Good luck,
ChevRev

Mar 30, 2009 | 1999 Chevrolet Silverado 1500

Not finding what you are looking for?
1991 Chevrolet C1500 Logo

293 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

75797 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22114 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8152 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...