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2001 Nissan Frontier Question: has spark and fuel pump is running but no crank

 

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Visitor, Brookhaven, MS, July 28, 2011, 19:00

was driving it turned it off got back in and turned it over and no crank checked spark it's good and fuel pump is running

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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, July 28, 2011, 19:16
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     Master

    The 2001 Frontier has a timing belt hopefully it hasn't broken and caused the internal components to become out out synchronization with each other (valves would bend interference fit engine).
    You have spark, do you hear the fuel injectors "clicking" that would indicate the computer is getting power, taking in in inputs processing them and controlling the fuel injectors, "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. Check for fuel pressure (you will need a fuel pressure gauge and look up the specified fuel pressure for your vehicle). Remove the fuel hose that goes to the fuel rail and get a friend to crank over the engine to see you have adequate fuel volume (you should have approximately 1 pint of gasoline in ten seconds of cranking). Off course take proper precautions as gasoline is highly flamable.
    Autozone have some popular workshop manuals for free on line once you register (for free) on their website http://bit.ly/autozone_repair_info. 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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  • Answer #2

    July 28, 2011, 21:10
     Enthusiast

    check timming. check cam and crank sensors

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