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Pgm-fi Main Relay??????????!!!!!!!!

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    #1

    Pgm-fi Main Relay??????????!!!!!!!!

    ok my car has been having problems starting and its weird cause one day it will start up fine, then the next day it wont even start?????? or sometimes it does that for some weeks . And apparently my instructor at my school said its the PGM-FI main relay wtf is that????????? but it must be important though.
    HELLAFLUSH 4 Me Coming Soon In Spring 2012
    Tags: pgm-fi relay
    #2
    its the main relay. it controls fuel and other shit. its up under the ds dash. take it out and take it apart and look for broken solder joints.
    COUPE K24

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      #3
      hmmmmmmm ......... im not the brightest at of all minds when comes to doing stuff like this cause the last time i did something like this i broke everything is it that simple
      HELLAFLUSH 4 Me Coming Soon In Spring 2012

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        #4
        You usually can't see broken solder joints in the main relay anyway... not without magnification.

        Just replace it. It's under your dash, to the left of the steering column, behind the cruise control brain box. It will be a small, rectangular box... brown and gray plastic, wiht one plug coming out of it. It can be a bitch to get to. Mine is currently dangling, because I didn't feel like putting it back where it belongs.
        Search on Google for a picture that matches my description if you need a visual.

        The main relay controls the fuel pump, and is a common thing to fail. However, it usually fails in hot weather, not the middle of February. Still, it's possible.
        Other no-start possibilities are your ignitor, ignition coil, or battery/ground connections.






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          #5
          Originally posted by deevergote View Post
          You usually can't see broken solder joints in the main relay anyway... not without magnification.
          Thats not true at all

          I have repaired many things in my cars before that had failed solder joints, they are very easy to spot

          The main rely ( once removed from the car ) takes a total of 20 seconds with a screw driver to take apart and check the solder joints. If the solder joints aren't even broken that will save you a trip to the junkyard to get a part that won't even fix your problem.

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            #6
            Yes, you CAN see them when they're that bad... but a bad solder point could also be invisible without magnification. Very often, the points in the main relay are that way.






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              #7
              yes it is simple just unbolt (or if your lucky you can slide it off its bracket) out from under the dash and unplug it, then pull the gray outer shell off of the brown/orange and check for bad solider joints here is a very good video on it

              http://www.youtube.com/watch?v=viIZ8k60awY

              best thing to go by
              -----------------------------------------------

              ''It is what it is, Do what you want''
              http://www.cb7tuner.com/vbb/showthread.php?t=167905

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                #8
                Eric the car guy said they can fail in extreme cold as well. I did not know that. Makes sense though.

                1990 Honda Accord LX Sedan, 205K, DD once again

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                  #9
                  Originally posted by deevergote View Post
                  Yes, you CAN see them when they're that bad... but a bad solder point could also be invisible without magnification. Very often, the points in the main relay are that way.
                  I have repaired multiple things that failed to work and every time i took them apart they were as broken as that. If they aren't that broken then they're still making contact

                  As a good measure you can resolder over them anyways, it dosen't hurt anything

                  I fixed:

                  The main rely in my old accord

                  The climate control in my integra ( every single mode button was cracked like above )

                  The power door lock control unit in the driver door

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