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1995 Chevrolet S10 Question: fuel pump change

 

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red0420, 4.3L V6, Graham, WA, December 04, 2011, 18:09
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i changed fuel pump, it is working, im gitin fuel up to the bleader at back of intake, i have pressure, truck wont start unless i dump fuel into air cleaner tube

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    PARTS GUY December 04, 2011, 18:41
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     Master

    What is your fuel pressure and volume reading?

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    red0420, December 18, 2011, 12:55
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    i was gitin 12 to 14, so i put a nother new pump in and giting same reading, and holding that pressure, so i dont have a leak, ishould have 58 to 62 lbs

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    PARTS GUY, December 18, 2011, 13:53
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    If your eighth digit in your VIN number is a Z then it is Throttle body Fuel injection (TBI). That is low pressure 9 to 13 PSI. If the eighth digit is a W then it is Central Port Fuel Injection (CPI). That is high pressure 58 to 64 PSI.
    You purchased the wrong fuel pump. This would have not happened at a NAPA parts house. What ever parts house you are dealing with did not ask you the correct questions.

    BE VERY CAREFUL THAT THE "SPYDER" INJECTORS ARE NOT LEAKING. If the plastic lines are leaking you could eventually hydrolock the engine or a FIRE.

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  • Answer #2

    mastertech6371 December 04, 2011, 19:46
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    not only check the fuel pressure and volume, the crank sensor also controls the injectors operation.

    Roy

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    red0420, December 18, 2011, 13:01
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    im giting 12 to 14 and holding pressure, i should have 58 to62 lbs

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    mastertech6371, December 18, 2011, 13:35
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    this year used both pumps. you have the wrong one in it. the difference is 2 dr and 4 doors.

    Roy

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    red0420, December 18, 2011, 13:52
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    the part number for the pump i got is BE3902 is that rite, cause that is wut shucks said
    (its the rong part)

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  • Answer #3

    patrick mannion from Greg Solow's Engine Room, December 05, 2011, 21:28
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    You must have ignition or it would not start, "listen" to the fuel injector. Using a mechanic's stethoscope (or use a long screw driver placing the handle end up to your ear place the metal tip end of the screwdriver against the body of the fuel injector), get a friend to crank over the engine while you "listen" to the fuel injector listen to each injector at the same point of the injector body. You should hear "click, click, click" as the injector is electrically opened and closed by the computer. If the injector is not being triggered you will not have fuel getting into the engine's cylinders. Disconnect the electrical connector at the fuel injector with the ignition key in the "on" position, (next position after the accessory position) you should have 12 volts at one of the two wires at the injector. This true for most vehicles but you need to consult a workshop manual for your vehicle to see that this is true for your vehicle. When the engine is running the second wire at the injector gets (triggered) grounded by the computer in your vehicle many times a second controlling exactly when and how much fuel gets injected into the engine. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online

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