Posted by Help needed on September 05, 2008 at 14:29:57 from (68.242.246.161):
I know no one really likes O/T's but anyway. My mother in law has a 1988 GMC pick up. Has about 90,000 original miles. 350 engine. Now the problem. When you start it up it has about 30psi on the oil pressure guage. Now as you drive it and the truck warms up the truck continues to hold about 30 pounds until you stop at a stop sign. When the rpms drop so does the oil pressure. The oil has been changed pretty regularly and the engine is pretty quiet while running.
So anyone got any ideas. maybe a bad sending unit? Maybe worn bearings what do you think? Thinks in advance.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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