Question about 1999 Toyota 4Runner

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Po302 code,po301,po300 i would like to know of a test for injectors...where can i get a noid light will it help.?...i think my injector is not working properly? that or coil pack?thanks

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  • kosmindtrip Dec 27, 2008

    i have used lucas fuel injector noticable difference...

    ive changed plugs wires, cleaned maf sensor,changed rear o2 semsor...i recently got an innova 1303 scan tool for christmas to help figure the problem out...heres some DTC freeze frame data maybe it can help?

    Parameter Description Value DTC for which Freeze Frame was Stored P0302 Fuel System 1 Status Closed Loop Fuel System 2

    Status Not Supported Calculated LOAD Value 66.67 %

    Engine Coolant Temp 197.60 °F

    Short Term Fuel Trim - Bank 1 0.78 %

    Long Term Fuel Trim - Bank 1 10.16 %

    Engine RPM 2773 rpm

    Vehicle Speed Sensor 32.93 mph

    Intake Air Temperature 78.80 °F

    thinking its the coil or fuel injector? thanks for any advice...

  • kosmindtrip Dec 28, 2008

    today i changed back to original plug wires and switched coil pack 1 to 3....i cleared all codes drove to the store with scan tool hooked up...ran fine to store no codes... when i came out and started it, i noticed it was stumbling again, it tru only one code this time po302....i believe the wires i put in were bad or i mixed up cylinders..i think this because i have the original code i started with before changing wires....could it still be the coil pack as to it is showing a code for only one cylinder and the coil connects 2-5 cylinder? im at a lose at the moment and back at ground zero....any advice would be great...thanks

  • kosmindtrip Dec 28, 2008

    going to test resistance on injector, and switch spark plug wire # 2 with snother to see if the wire is bad,

  • Anonymous Mar 28, 2014

    wendrivingtogofasterpressgaspedal eng.light keeps flashing

  • Anonymous Apr 01, 2014

    the noid light plugged into injector 6 works then cuts off after i



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Usually a p0300 is a random missfire code due to a fuel problem probaly bad gas , use some in tank fuel treatment such as techron or lucas injector cleaner, after adding fuel disconnect negative terminal to batt, to clear codes and see what happens

Posted on Dec 27, 2008


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