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  • #1

    Smoke on start-up, rough idle

    I know this has been covered many times before but i can't seem to get to the bottom of this one.
    I have tried and replaced the following:

    1 New cylinder head fitted (all ok before)
    2 New radiator, thermostat and rad cap
    3 New glow plugs (fuse ok and waiting for the beep before starting)
    4 Tried doing the glow plugs twice before starting
    5 Ran the engine with ATF fluid in the diesel filter (twice)
    6 New diesel filter
    7 New air filter
    8 Oil and filter replaced
    9 Re-checked the timing marks and all ok
    10 Egr removed and blanked off
    11 Tried with derv and veg

    But after all this i am still getting grey smoke on start up and it runs like a bag of spanners until it warms up.
    Roy
    When ya stop having fun, Ya start getting old
    Tags: None
  • #2
    Have you done a diagnostics check?

    Comment

    • #3
      By that you mean???
      Roy
      When ya stop having fun, Ya start getting old

      Comment

      • #4
        If you mean the beep code then no. there is no warning lights on the dashboard.
        Roy
        When ya stop having fun, Ya start getting old

        Comment

        • #5
          Do the test anyway.....
          http://toyotasurf.asn.au/techsite/efifaultcodes.htm

          It'll take the guesswork out of trying to diagnose a problem over the internet and prevent a lot of confusing and unnecessary posts.

          If I had to guess though, I would say the EFI temp sender on the side of the block, under the inlet manifold is kaput or the wiring is disconnected or damaged during the head swap.

          Comment

          • #6
            I'd test for voltage at the actual glowplugs for starters.

            Rob.

            Comment

            • #7
              Sorry to hear u still got problems mate.....
              Hope u get them sorted.....

              The test Bushwacker suggested sounds like a good idea to me....

              ehh and got knows what the glow plug voltage has to do with anything....seen as she starts fine....
              One day at the time I guess..

              Comment

              • #8
                Originally posted by BUSHWHACKER View Post
                Do the test anyway.....
                http://toyotasurf.asn.au/techsite/efifaultcodes.htm

                It'll take the guesswork out of trying to diagnose a problem over the internet and prevent a lot of confusing and unnecessary posts.

                If I had to guess though, I would say the EFI temp sender on the side of the block, under the inlet manifold is kaput or the wiring is disconnected or damaged during the head swap.
                The reason i have not done the beep code bit is that there is no light on the dashboard so i assume no fault will be logged on the system, I'll give it ago tomorrow but don't hold out much hope.

                Would this only effect start up as she runs a dream once reved up a few times.
                Last edited by roylittle0; 6 December 2008, 05:52.
                Roy
                When ya stop having fun, Ya start getting old

                Comment

                • #9
                  Originally posted by TobyJug View Post
                  Sorry to hear u still got problems mate.....
                  Hope u get them sorted.....

                  The test Bushwacker suggested sounds like a good idea to me....

                  ehh and got knows what the glow plug voltage has to do with anything....seen as she starts fine....
                  Hi Toby, all is well at this end.

                  Originally thought it was the glow plugs as when i tested them they had around 11. something volts at them, but swapped them anyway only to find that the new looking old ones (bear in mind they were in the head when i got it) had been sprayed with silver paint to make them look pretty, therefore giving a bad electrical connection, so i thought that would cure the problem but no such luck.
                  Roy
                  When ya stop having fun, Ya start getting old

                  Comment

                  • #10
                    Originally posted by TobyJug View Post

                    ehh and got knows what the glow plug voltage has to do with anything....seen as she starts fine....


                    It starts with lots of grey smoke, then runs lumpy but clears with a couple of revs.

                    Mine did that before I changed the glow plugs. My old mondeo did that before I changed the glow plugs, and my old escort did that before I changed the glow plugs. Hence I said check for voltage at the glow plugs knowing that new ones were fitted. Maybe a bad connection giving lower power and making them not work poorly.

                    However as thats been checked I'll get my coat.

                    Rob.

                    Comment

                    • #11
                      Originally posted by wishbone View Post
                      It starts with lots of grey smoke, then runs lumpy but clears with a couple of revs.

                      Mine did that before I changed the glow plugs. My old mondeo did that before I changed the glow plugs, and my old escort did that before I changed the glow plugs. Hence I said check for voltage at the glow plugs knowing that new ones were fitted. Maybe a bad connection giving lower power and making them not work poorly.

                      However as thats been checked I'll get my coat.

                      Rob.
                      My thoughts exactly, with the paint on the glow plugs that was giving bad continuity, so i thought i had found the problem (only taken me about 2 months), I'll take a look at the fault codes in a bit when i wake up properly, just finished night shift and had my alloted 3 hours sleep, not a happy bunny.
                      Roy
                      When ya stop having fun, Ya start getting old

                      Comment

                      • #12
                        OK so i have tried the error code thing and get a code 2 (two flashes) and the list i have says it is the turbo boost pressure sensor, i have disconnected the battery and I'll leave it for a while and see if it was an old fault that has cleared, but where is the sensor and could it be the cause.

                        If this is the one on the side of the intake pipework then it was left disconnected when i first fitted the head so it could well be an old fault that has cleared, but we will see, the green light on the dash comes on when turbo is boosting so i think the turbo is seeing a sensor of some sorts.
                        Last edited by roylittle0; 6 December 2008, 12:56.
                        Roy
                        When ya stop having fun, Ya start getting old

                        Comment

                        • #13
                          Just rechecked the error codes now the battery has been disconnected for a while and it has reset to 1 (one flash) therefore system normal, ran the engine for some time and still get only one flash.
                          Roy
                          When ya stop having fun, Ya start getting old

                          Comment

                          • #14
                            Hello Roy,

                            You're describing the exact fault that my 2.4 LN130 suffers from - difficult cold starting, plenty of grey smoke on start-up, rough running for a number of seconds. But when warm it starts and runs just fine.

                            It may have got worse since the head was changed but I think it was doing it before the head change but to alesser extent. It does seem to have go gradually worse but that could be the onset of the colder weather.

                            I've changed glow plugs (and checked circuit), air, oil and fuel filters. The next thing would be to try blanking the EGR but notice you've aready tried that to no avail.

                            So, did you get to the bottom of your problem? I notice on here that quite a few vehicles seem to suffer from the same fault but have not seen a definitive solution yet.

                            Cheers,

                            Jonathan

                            Comment

                            • #15
                              No, I've still not got to the bottom of it yet, i did however replace my injectors yesterday and this made quite a difference to the lumpiness on start up but i still get the grey smoke, so I'm still looking.
                              Roy
                              When ya stop having fun, Ya start getting old

                              Comment

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