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Dark Smoke When Accelerating

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    #1

    Dark Smoke When Accelerating

    When i accelerate fast alot of dark smoke comes out but not when i drive normal? what can i do to stop the smokeing, is it bad ?
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    #2
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    Same thing happens to me.. It's probabally your rings or valve stem seals.

    Comment

      #3
      Originally posted by bxjdm
      When i accelerate fast alot of dark smoke comes out but not when i drive normal? what can i do to stop the smokeing, is it bad ?
      bluish smoke?.......valve seals

      Either replace seals or head

      Comment

        #4
        Dark smoke I am gonna assume black. Hows your tune up.

        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

          #5
          Black smoke is excess fuel. Blue is oil.

          Burning oil could be valve seals, as mentioned above.

          Excess fuel is more likely. If you have an intake, header, and/or exhaust, those things usually cause the ECU to dump more fuel than is really needed (a condition called "rich", the opposite of "lean", which can be more harmful).

          It's VERY common for modified cars to puff out some black smoke if the ECU isn't properly tuned for the mods (and tuning an ECU isn't as easy as bolting on an intake)

          Look at all the obnoxious imports in your area... keep an eye out for white ones. Take notice if they have black soot all over their bumper around their tailpipe




          Basically, your options are: a) live with it, or b) get a chippable ECU and have it tuned for your motor.






          Comment

            #6
            black=running rich
            blue= oil
            white =coolant.

            your probably just running a little rich

            Comment

              #7
              I'm running very rich. What could I do? I can tell b/c I was with a friend and this happenned...
              I noticed it was smelling bad, so I asked him to see what happenned, puffed out some dark smoke. So I rev'd to 5k and gas literally shot out. However, if I rev very gently then it isn't as bad, he mentioned a throttle sensor, I don't know... But now I can't go over 1/3rd accel to avoid the bad smell and running very rich. It's hard to daily drive with all my hills and me starting up a hill every morning...

              Other info: Drove about an hour going 70-100, dropping to 4th and flooring when I couldn't see cars... so I mean high rpm driving. Reset the ECU last friday after re-ataching EGR hose and cleaning out my IAC valve. Should be unrelated...

              Sorry if I am thread jacking, I just thought this was similar and didn't need a whole new thread.
              Click for my ride thread.

              Comment

                #8
                A new OEM o2 sensor may help things. Don't get an aftermarket one, as I've heard that they don't read correctly (Bosch, primarilly)






                Comment

                  #9
                  Is there any cheap things I can try first before I spend money on an o2 sensor? How much should I expect to pay at Honda for one of those...?
                  It just bothers me how this happens right after the first time I've ever touched my engine... feels like I broke something. I'm sure I didn't though. sigh.
                  Click for my ride thread.

                  Comment

                    #10
                    Originally posted by ilovemycb7
                    I'm running very rich. What could I do? I can tell b/c I was with a friend and this happenned...
                    I noticed it was smelling bad, so I asked him to see what happenned, puffed out some dark smoke. So I rev'd to 5k and gas literally shot out. However, if I rev very gently then it isn't as bad, he mentioned a throttle sensor, I don't know... But now I can't go over 1/3rd accel to avoid the bad smell and running very rich. It's hard to daily drive with all my hills and me starting up a hill every morning...

                    Other info: Drove about an hour going 70-100, dropping to 4th and flooring when I couldn't see cars... so I mean high rpm driving. Reset the ECU last friday after re-ataching EGR hose and cleaning out my IAC valve. Should be unrelated...

                    Sorry if I am thread jacking, I just thought this was similar and didn't need a whole new thread.

                    when was the last time you did a tune up? How's your ignition timing? your car idle rough or miss alot?

                    Comment

                      #11
                      My ignition timing is advanced 2 degrees... but it's been like that since last summer. My car did have a surging idle but right before this I cleaned out the IAC which seemed to get rid of it. And there is no noticeable missing when it runs... which I've heard you can definitely tell.

                      As far as a tune up, everyone says this. But what exactly does it mean? Top off all fluids...? I'm sure there is more.
                      Click for my ride thread.

                      Comment

                        #12
                        A basic tune up is replacing the cap, rotor, spark plugs, and wires if necessary. Correct the ignition timing, change all fluids that should be changed, change/clean the air filter if necessary...

                        Basic, inexpensive maintainance.

                        If you're running extremely rich, your spark plugs are most definitely fouled.






                        Comment

                          #13
                          Okay. Well I know my fluids are good... I'm pretty sure honda said they topped 'em off at my free inspection. And then also I just looked at 'em all and they are good. I do'nt know about cap/rotor. My plugs were fine a few weeks ago, but I do have oil leaking in the tube seals, and maybe vc seal. So I should replace those seals and then get plugs. Maybe that's the problem. The filter looked good...

                          Why should I put my timing back? I like the sound and there is a tad more power.

                          Does the richness increasing with throttle mean anything? I've been driving at like 1/3rd throttle and shifting under 3k and I can't smell it too much. But I do have NO power, I opened up to WOT once and it had no pull. boo.
                          Click for my ride thread.

                          Comment

                            #14
                            Should I try replacing the plugs and seals first? B/c what if it is the o2 sensor and then after I put on the new parts they just get fouled again... any way I can test the o2 sensor?
                            Click for my ride thread.

                            Comment

                              #15
                              ok so now what

                              i turned on my car and saw blue smoke, its blueish smoke i c. but my girl was driving behind me when i floored it and she said the smoke was a bit darker and it stunk pretty bad. so ok blueish smoke people said the vavle rings or changing head, what should i doooo????

                              Comment

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