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High rpm smoke

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    #1

    High rpm smoke

    Althought this may seem like a new member question, I'm going to ask anyway.

    When I am merging onto the highway, often at engine speeds over 4k, I often see smoke coming out of the tailpipe(via rearview of course).

    I have a 93 EX coupe.

    1-Could this be somehow related to the secondary intake runners opening, with some kind of blockage or problem with this system. I can also smell the exhaust coming into the interior at these hugher rpms.

    2-Consdiering the mileage at 227,xxx miles, this may be from engine wear. However at lower engine speeds, such as driving in traffic I see no smoke.

    3-I've considered that it may be as simple as a loose hose, or an exhaust leak. I haven't had the chance to clean the ERG valve, so that is next to check out.

    Thanks!
    Tags: None
    #2
    mine and friends past experiences with the higher rpm smoke turned out to be valve seals..

    Comment

      #3
      Originally posted by 93excoupe
      Althought this may seem like a new member question, I'm going to ask anyway.

      When I am merging onto the highway, often at engine speeds over 4k, I often see smoke coming out of the tailpipe(via rearview of course).

      I have a 93 EX coupe.

      1-Could this be somehow related to the secondary intake runners opening, with some kind of blockage or problem with this system. I can also smell the exhaust coming into the interior at these hugher rpms.

      2-Consdiering the mileage at 227,xxx miles, this may be from engine wear. However at lower engine speeds, such as driving in traffic I see no smoke.

      3-I've considered that it may be as simple as a loose hose, or an exhaust leak. I haven't had the chance to clean the ERG valve, so that is next to check out.

      Thanks!
      with that type of mileage on your engine you may need to do a valve job. do a compression check.

      Comment

        #4
        burning oil?
        My Member's Ride Page (Do it)

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          #5
          Color of smoke?

          The New-ish Ride
          My old Ride
          Hear my Vtak!!!
          MK3 Member #3
          I piss off people for fun.
          IA 08 Sunburn Victim #1

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            #6
            valve seals. mine smokes all the time so im putting another engine in with half the miles :o)
            '90 Accord LX, 5spd.

            Comment

              #7
              yup, its the valve stem seals. that why it only happens at high rpm's. if you ever get a head job done or anything be sure to tell the machine shop to put in the new valve guide and stem seals in for you. it usually comes with the head gasket kits.

              Comment

                #8
                Ya Its Prob Oil, I Have it at High RPM's too. Valve Job all the Way...


                Steel Ram Bars, 10 Driving Lights, Rally Edition
                Originally posted by chessboxer
                infuckingcredible.

                Comment

                  #9
                  Originally posted by HondaRallyCar
                  Ya Its Prob Oil, I Have it at High RPM's too. Valve Job all the Way...
                  Valve job Anyway first what color is the smoke havent answered that yet.

                  The New-ish Ride
                  My old Ride
                  Hear my Vtak!!!
                  MK3 Member #3
                  I piss off people for fun.
                  IA 08 Sunburn Victim #1

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                    #10
                    that's normal blow smoke over 4k rpm, you ever consider that its just your vtec kickin in? lol just kidding. im not goin to really say anything about the smoking problem yet because i dont know what color the smoke is. plus, i don't want to sound like a fool. but the problem with the exhaust in the car? that's not good . if the EGR is blocked, all that should really happen is an exhaust restriction, and maybe an engine light. you should probably check for the leak from the headers to the EGR, including everything in between that. you should also probably check if you have an underbody exhaust leak, just to eliminate that factor. fumes are the last thing you want in the cabin. oh, and btw, do you have any work done to your car?
                    Last edited by honda4lyf88; 02-15-2007, 07:15 AM.


                    can't deny that...

                    Comment

                      #11
                      Color of smoke is critical. White is coolant/water, and COULD mean headgasket. You would want to have a shop to a head gasket integrity test.

                      Blue/black is more likely oil. Stems seals are a good bet, especially if they've never been done. Also, if it turns out to be this, I would recommend highly going to get Honda OE stems seals, the cheap ones in head kits are usually very poorly made and might start leaking again soon. They're not expensive from honda, and its a good investment.


                      Proud owner of the only JJDM full 2.5" catback exhaust!

                      Comment

                        #12
                        It is difficult to tell what color the smoke is, but i'd sure like to find out. I hoped that it didn't require head work, although that may come later.
                        Hah! Vtech would be nice, but I do enjoy the secondary runners when they kick in.

                        Comment

                          #13
                          ITS VTEC DAMN IT. And Black is a rich mixture. Oil only comes in blue or grey smoke.

                          The New-ish Ride
                          My old Ride
                          Hear my Vtak!!!
                          MK3 Member #3
                          I piss off people for fun.
                          IA 08 Sunburn Victim #1

                          Comment

                            #14
                            I get blue smoke at start up only after car has sat for a few days and always
                            at high rpm.

                            Comment

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