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Alex, ASE Certified Technician
Category: Chevy
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Experience:  ASE Certified Master Technician, L1 Advanced Level Specialist
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Chevrolet S10 4x2 1996 s10 PU vortec V6 Will not start unless

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1996 s10 PU vortec V6 Will not start unless I spray starting fluid into throttle body. After I spray throttle body the engine stays started. I have checked the relay in the glove compartment, replaced the plugs, wires, distributor cap, rotor and fuel filter. I am also getting PO303 error I have cleared the error and it keeps coming back. I would like to test the fuel pressure however I cannot find a picture that shows where to test it. I have purchased a fuel pump but I have not installed it. I would like to test the fuel pressure first.
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Look on the driver's side of the distributor, back behind the engine. You will see the two metal fuel lines going into a bracket. The test port is just before the bracket, where the lines go behind the engine. There may be a plastic cap on it.


Fuel pressure should read 60-66 psi. If fuel pressure is less than 60 psi, replace the fuel pump.
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