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Well the warning light is supposed to come on if any of the gauges display a dangerous condition, such as no oil pressure. You may have a faulty sending unit for the gauge, or a wiring problem, or the engine may actually be loosing oil pressure when the gauge drops. You could replace the sending unit as a test, or have someone check the oil pressure with a mechanical gauge.
it might be the sending unit, is it a buick 350 or a chevy. 350? if a buick engine the sinding unit should be on the side of the timing cover if a chevy 350 next to the dist.
remove the oil sinding unit and install a manuel gauge and see just what the oil pressure is if below 10 psi at hot idle replace the bearings and oil pump in the engine. if this is a chevy 350 make sure you replace the camshaft bearings this is were we use to see the gratest oil pressure loss.
u Have a problem with the oil sending unit. The sensor is located beack right side of the engine block. Take out the switch and make sure u have good oil PSI. Should be 6 psi at idle and around 50 at 4000 RPM. If the presure is ok replace the switch they are very cheap about 20 bucks. Please rate.
the rad must run as soon as AC is put on ,some cars have a pressure switch that put the rad on when the gas pressure in the ac system goes up with temperature ,cheapest way round this is to connect fan via a relay to the ac pump feed so as soon as ac is turned on fan comes on
Have you done the basic maintenance. Spark plugs, oil change, ect.? As for the fans, if you have a/c one of them should only come on when your a/c is on. The other is regulated by a relay so when your car reaches a certain temp it kicks on.
Replace the useless oil pressure sending unit with one from a early year such as 1986 .connect only the wire to the oil light.if you want a pressure gauge install an after market one..The stupid factory sending units can not rear pressure under 40lbs.at less than 40psi the light is on and the gauge reads 0 good luck carl