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1990 Mazda B2600 Question: what would cause a B2600i not to start.

 

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brett022982, Reynoldsburg, OH, January 27, 2012, 20:04
 Rookie

i can spray starting fluid and it will start and run. turn the truck off and it will not start on its own. you will have to start it with fluid again.55 lbs fuel pressure.have spark.............

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    patrick mannion from Greg Solow's Engine Room, January 27, 2012, 22:38
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     Master

    It could be many things, unfortunately and without experiencing the problem first hand or being able to do some basic diagnostic tests its hard to say. Your on the right track checking the basics, spark, fuel and compression. Have you a big vacuum leak that is causing it to need extra fuel to start?
    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. Next "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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    brett022982, January 28, 2012, 06:04
     Rookie

    had plenty of fuel volume. no click when cranking at the injector. i do thank you sir , you were very helpful..............

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