Question about 2001 Chevrolet S-10

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Fuel pump and pulsator broke down on my s-10. in adddition to replacing these items, i also replaced the fuel sending unit and oil pressure switch. after performing these tasks, my vehicle will not start. every item electrical, fuel system, brakes, down to minor vacume hoses have been replaced on this vehicle and nothing works? after noticing the vehicle wouldn't start i checked the fuel pressure and it's just fine on the motor and the lines are charged. the spark plugs are dry and i'm completely baffeled at this moment in time on where to go next in resolving this issue with the vehicle other than sending it to a wrecking yard.

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Please review my tips at http://www.fixya.com/cars/r5821173-doesnt_car_start_gasoline_engines and let me know if you have questions. You were not clear in your symptom--does the engine crank?

Posted on Sep 15, 2010

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Posted on Jan 02, 2017

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I have a 1998 S-10 with a 4 banger. The problem is at times it just will not crank. It turns over fine but sometimes it just won't crank up. When it does this after several atempts sudenly it fires right...


The problem is your oil pressure sending unit this sound hard to belive but its true and its the problem. The fuel system works on a split circuit from fuse # 9 power goe's to the relay but also goe's to the oil sending unit as well and the sending unit is the place where the fuel pump is feed from the relay comes into the oil pressure sending unit. A nd the oil pressure unit needs to build up enough pressure from the oil pressure for the switch in side of it ot trip your is hanging up. So the power supply to the fuel pump is being interuped because it is comeing from the oil sending unit.

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