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Automotive Repair Car Troubleshooting Topics   Car Troubleshooting   Engine Troubleshooting   Engine Fault Codes   Electrical and Wiring   Transmission Problems Car Repair Topics   Car Making Noises   Car Stereo Repair   Heating or AC Issues   Motorcycles and ATVs   Tricks of the Trade   Truck Repair Advice Site Options:      Login   Sign up here! Latest Forum Post   Strut spring orientation and strut mount tension nut 2017 Nissan rogue awd 2.5 L Put in Monro...   Transmission stuck in part, I have tried everything So I'm working on my elderly fathers 201...   2017 dodge journey LED headlights on/off randomly Year of vehicle 2017 Make of vehicle dod...   Kia Soul starter replacement issues! Okay so my car is a 2010 Kia soul 2.0 en...   Please Help - Knock sound & engine fail Hi all, Hoping to get some insight and ...   multiple warning lights 2013 GMC Terrain 130,000 miles 4 cylinde...   03 alero no low speed blower Good day everyone, I have a 2003 Olds a...   04 Chevy 2500hd tail light issues Help!!! I have changed my combo switch...   1999 Grand Caravan Sport not starting. Hi. I'm new here. I hope someone can hel... Brake Seals Bulging 2021 Toyota Corolla LE 1.8l 65,000 mile...

Oil Pressure gauge Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> Engine Troubleshooting jjlutz New User Dec 29, 2010, 6:34 PM Post #1 of 5 (1435 views) Oil Pressure gauge Sign In I have a 1988 GMC 1500 4WD with a 5.7 engine. When the engine starts up I have a little better than 30 lbs oil pressure. I plow with the truck, and after about 20 minutes, the pressure falls to a level that lights the "Check Gauges" light on the dash when it falls to an idle. Just today it would not come back up and turn out the light when engine speed was raised. I had just changed the oil before this started happening. There is plenty of oil in the pan, and the lifters don't seem to be starving for oil. The engine seems to be running well, but it is disconcerting to see that light on. Is it possible that the sending unit is bad, or is it more likely the oil pump? Hammer Time Ultimate Carjunky / Moderator Dec 29, 2010, 6:54 PM Post #2 of 5 (1426 views) Re: Oil Pressure gauge Sign In I would first try changing the oil again and use a different brand this time. Some vehicles just don't like some brands of oil. If the problem still persists, then your going to have to verify the pressure with a manual gauge to see if the sender is accurate. It might be even cheaper to just replace the sender to see if it helps. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. jjlutz New User Dec 29, 2010, 7:21 PM Post #3 of 5 (1422 views) Re: Oil Pressure gauge Sign In Thanks; Another issue may be that I put in 10-40 instead of 10-30 to try and boost the Oil Pressure. I live in Maine and it is COLD. I should try and go back to 10-30? Hammer Time Ultimate Carjunky / Moderator Dec 29, 2010, 7:24 PM Post #4 of 5 (1418 views) Re: Oil Pressure gauge Sign In It won't be too serious with a truck that old but that would be a real problem on a later model. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. jjlutz New User Dec 30, 2010, 3:33 PM Post #5 of 5 (1399 views) Re: Oil Pressure gauge Sign In Thanks Hammer Time . . . . I pulled the sending unit off and hooked up a mechanical gauge and it blew the gauge to its highest mark. I put in a new sending unit in and it seems to be working fine. I'm glad it wasn't the oil pump. That would have been a big replacement job, especially with a foot of snow on the ground. Thanks again.   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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