I have changed oil recently to my truck. I noticed the oil meter jumps over 40 then when hit the brakes goes down to 0 and then the check gauges light comes on. then when I step on the gas it goes back to normal. any ideas...
You either have a faulty gauge or your oil pump is going bad or you have a clog int the oil system somewhere , how many miles on the truck..,, try flushing the oil system your main bearings could be gettin weak also but start with the easy things first,.,.
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Ho, that doesn't bode well for your tank monitoring. It was a fluke, but may keep doing it, if the odometer is a mechanical meter with numbers turning from the speedometer cable by plastic gearing that wears. Watch for it to jump at the next 100 mile turn over.
I understand your reluctance to change out the fuel level sender in the tank if that is why the gauge doesn't work. It is a lot of work. But have you checked to see if it's the dash gauge or the sender unit? A couple of electrical tests could determine that. If it is the dash gauge, that is comparatively easy to replace, and you could buy a used one-they seldom go bad. Otherwise, keep tracking your miles.
Tough to say. The lifter making the noise could be allowing oil pressure to escape. Or it may be dry for oil because oil is not getting to it. You may have to take the lifters out to see if it is a lifter problem or lack of oil.
You probably have a bad sending unit for the fuel level in the tank. this would cause the gauge to be erratic when the level is below 1/2 tank and the float is moving around much more than when full. The oil pressure gauge problem could be caused buy a loose wire connection or a faulty sending unit.
I would first suggest using a volt /amp meter and test the voltage from the large wire off the back of the Alternator. You will need a second person to help feather the throttle to change the engine speed. You should see a steady increase in voltage from 12.6 to 14.5V when the idle is increased. If the voltage jumps around on the meter then chances are you have a bad voltage regulator in the Alternator and need to replace it. If the voltage is normal and doesn't bounce around then you have a faulty gauge in the dash.
the gauge should be at around 40 psi steady and higher at higher rpms,try using thicker oil if you have high milage ,if no change go ahead replace the oil pressure switch. hope this helps you please vote.
sounds like possible oil starvation due to leak in pick up or supply galleries
suggest checking with proper test gauge to see if its the same
if it is the same check pressure relief valve in pump (to see if jamming open)
then check pick up in sump and "O" ring