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1994 Chevrolet S10 Question: how much fuel pressure should there be, and where is it measured ?

 

Question

Icky Ricky, 4.3L V6, San Diego, CA, January 14, 2014, 02:52
 Rookie

Runs rough, won't idle, lurches, can't go faster than 25 mph. Replaced TPS & IAC Valve........No Change....Truck is on side of the road and I don't have OBD 1....no codes....Fuel pressure ? Ignition ?

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  • Answer #1

    pushrod January 14, 2014, 04:48
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     Master

    CPI 55-60 psi @ schrader valve rear of engine. AND IT SHOULD HOLD PRESSURE WHEN KEY IS TURNED OFF!!! If it does not then the fuel spider is the likely suspect! Need a tow in that case. Black smoke from T-pipe?? Light on?

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  • Answer #2

    Tires Too (133 Answers) , Londonderry, NH - (603) 473-4287
    tires too January 14, 2014, 04:55
     Journeyman

    What is the 8th digit of the VIN. If it is W fuel pressure should be 55 to 60 psi. If it is a Z fuel pressure should be 6 to 9 psi.

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    Icky Ricky, January 14, 2014, 10:40
     Rookie

    It's a Z..So the fuel sys. should hold press when key is off...If it doesn't...Spyder is located ? SURVEY SEZ...Under INTAKE MANIFOLD ???

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  • Answer #3

    Greg's Orange Auto (12960 Answers) , Orange, CA - (714) 361-9386
    globalhelper January 14, 2014, 06:28
     Master

    YOU NEED AN ADAPTOR TO CK IT WHERE THE FUEL FILTER IS

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    Icky Ricky, January 14, 2014, 10:51
     Rookie

    Are there 2 filters ? Back of eng and back by fuel tank ?

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