Above Forum Ad

Collapse

Announcement

Collapse
No announcement yet.

t4 problems over fueling to the max.??

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • t4 problems over fueling to the max.??

    hey guys my 2l t4 was running not extremely well tho lol problems on cold start the 2 pin i think. but i drove home the other day and it conked out when warm which it hasnt done before. any way ive done a compression test ~170psi on all 4 but really rich. plugs where still wet and covered in black from me tow starting it after it stopped lol. the van would run at full throttle and nowhere else blow lots of fuely smoke. ive change out the fuel pressuer reg. ( wasnt a easy job lol ) cleaned the ecu vac line and put in a oneway valve. cleaned the plugs, changed the coilpack for my test one, tried a different 2 pin sensor. what else is there to check besides the ecu. ?? anybody had this sort of problem before.
    cheers brenton
    Last edited by DVR68U; 25-12-2007, 04:09 PM.
    MK1 4door
    MK2VR6
    MK3VR6
    Transporter
    1st place, stock MK3VR6. Vw nationals 07
    2nd place, mod MK2VR6. Vw nationals 09
    and untold wrecks

  • #2
    Does it not have diagnostics in the ECU that you can look at?

    They(engines in general) often over fuel in response to a bad sensor input.

    Gavin
    optimumcode@gmail.com | https://www.vwwatercooled.com.au/for...i-;-79012.html | https://www.facebook.com/TTY-Euro-107982291992533

    Comment


    • #3
      You need to pull the codes man, didnt you have a handheld code reader??

      I have the 1551 and a spare ecu and I`ll be at work on Thursday.
      sigpic Camden GTI Performance. VW / AUDI Specialists
      All Mechanical Work, Log book Servicing, New and used Parts and Imports
      19-20/6 Badgally Road, Campbelltown, 2560
      02 4627 3072 or 0423 051737 www.camdengti.com

      Comment


      • #4
        Bad for blue coolant temp sensors mate. Cold signal when warm extended fuel injection pulse but also saw one fill up cylinders due to a faulty ecu!!
        Good luck mate
        Alba European
        Service, Diagnostics and repairs. Mobile Diag available on request
        Audi/VW/Porsche Factory trained tech 25+ yrs exp
        For people who value experience call 0423965341

        Comment


        • #5
          could the ecu be reset or did it need new one ?? seems like mine might be a dodgy ecu. its already got a sticker on it from some elct company back in 2000. with one plug out the car just sprays fuel out of the plug hole when you kick it over. i have changed the 2 and 4 pin sensors, coilpack, re earthed the battery and ecu with a runner between the ecu earth point to the batt.
          hmmm ???? can i leave the ecu unpowered for a day or something and it will forget its learnt values ?
          cheers brenton
          MK1 4door
          MK2VR6
          MK3VR6
          Transporter
          1st place, stock MK3VR6. Vw nationals 07
          2nd place, mod MK2VR6. Vw nationals 09
          and untold wrecks

          Comment


          • #6
            Check and see if the injectors are firing with the ignition on and the engine stationary.

            Digifant Golfs are famous for blowing the injector driver in the ECU after a clutch change. Someone would forget the earth strap for the gearbox, when you started the car, the starter would earth through the ECU and blow it up.

            Then the injectors would be constantly on, filling the cylinders with fuel. Continued cranking often bent a rod.

            I wonder if you have a bad earth which is causing a similar scenario?

            Gavin
            optimumcode@gmail.com | https://www.vwwatercooled.com.au/for...i-;-79012.html | https://www.facebook.com/TTY-Euro-107982291992533

            Comment


            • #7
              H100vw great call mate seen the same but dude with the fault- thats exactly what was happning to the golf i diagnosed. The ecu had carked it and was filling the sump mate washing bores etc. Yeah you turn the thing over and it sprays fuel. Gettin too much im afraid, if i were you take loon up on his offer of an Ecu .
              Good luck mate.
              Alba European
              Service, Diagnostics and repairs. Mobile Diag available on request
              Audi/VW/Porsche Factory trained tech 25+ yrs exp
              For people who value experience call 0423965341

              Comment


              • #8
                yeah i had a phone call today from a uncle in canada, i told him about it and he said he had the same problem with the bad earth, and it was earthing back thro the ecu. its funny that i get 3 ppl telling me this in one day. i reearthed the battery and cleaned up the ecu earth and ran another directly to the battery from the body/ecu earth this morning.
                is there a way to find out if the ecu is burnt out ? using the 1551 etc. the van ran 2 day after the codes where cleared. then i changed out the 2pin and 4 pin sensor for my old ones. and drained the oil as it had half the fuel tank in there . and after it cooled down the motor wouldnt start again. its driving me crazy lol. so how can you tell if the ecu is cooked??
                cheers brenton
                MK1 4door
                MK2VR6
                MK3VR6
                Transporter
                1st place, stock MK3VR6. Vw nationals 07
                2nd place, mod MK2VR6. Vw nationals 09
                and untold wrecks

                Comment


                • #9
                  Donor ecu pal - Golf Loon is ya man. Like i say ive seen cylinders fill up with ecu being U/S and there is a list of implications there so glad you have the savvy to drain the sump! Might pay to put a little squirt of oil down the bores too, you lose a load of compression with bore wash too mate. With 1551 you cant test the map or the eeprom only input and output. And might not even throw a code. It must be bench tested or try the donor.
                  Good luck mate and Happy New Year!!!
                  Jimmymac
                  Alba European
                  Service, Diagnostics and repairs. Mobile Diag available on request
                  Audi/VW/Porsche Factory trained tech 25+ yrs exp
                  For people who value experience call 0423965341

                  Comment


                  • #10
                    If you can't get an ECU then you might be able to take the lid off the suspect one and check the output of the injector driver

                    Follow the injector wires back to the ECU to see where they comeout of it. Then follow the same lines from the plug to the circuit board.

                    Gavin
                    optimumcode@gmail.com | https://www.vwwatercooled.com.au/for...i-;-79012.html | https://www.facebook.com/TTY-Euro-107982291992533

                    Comment


                    • #11
                      This van is cursed guys.

                      We tried a different ecu, luckily its an early uncoded key car so that was easy.

                      Same symptoms.

                      Change the two water temp sensors on the water outlet, cleared the codes with the 1551 and cleaned the dissy cap. Checked the timing, all good there.

                      Then the car started. Sounded sweet, consistantly started a few times and ran.

                      1551 was getting no codes at this point.

                      I then left and Brenton changed the second hand sensors I brought for his original new ones and drained and replaced the oil and the water.

                      Van now does not start!

                      I suspect the sensors, even though they are new, but will probably have to go back out to the boondocks to find out.

                      What do you blokes reckon?
                      sigpic Camden GTI Performance. VW / AUDI Specialists
                      All Mechanical Work, Log book Servicing, New and used Parts and Imports
                      19-20/6 Badgally Road, Campbelltown, 2560
                      02 4627 3072 or 0423 051737 www.camdengti.com

                      Comment


                      • #12
                        Logic says it is the sensors or someting to do with them eg wiring (can't see oil and water change causing faults). Of course logic sometimes doesn't work The other thing that comes to mind is some kind of connection/wiring problem (intermittent fault that sometimes passes current or shorts out), maybe a poor earth ? Worth chasing down and fixing properly, otherwise the van is going to be unreliable even if it does magically seem to cure itself (these sort of faults always seem to re-occur at just the most inconvenient time). Hope you get somewhere soon.
                        2017 MY18 Golf R 7.5 Wolfsburg wagon (boring white) delivered 21 Sep 2017, 2008 Octavia vRS wagon 2.0 TFSI 6M (bright yellow), 2006 T5 Transporter van 2.5 TDI 6M (gone but not forgotten).

                        Comment


                        • #13
                          I'd have a look at the sensors for sure. Very simple things, you can check them with a multimeter and a heat gun. Once you establish which pairs of contacts do what.

                          I think we are talking about 4 pin senders in the top hose, 2 are for the ECU and 2 for the temp gauge.

                          Compare 2 senders if you can. They should have a similar resistance at ambient temp which decreases if you warm the sender up. You should monitor the resistance of the suspect one as the temp changes, as it could be going open circuit at a certain temp. The ECU would see a high resistance, which it assumes is a mega cold engine and stick in loads of petrol for cold running.

                          Gavin
                          optimumcode@gmail.com | https://www.vwwatercooled.com.au/for...i-;-79012.html | https://www.facebook.com/TTY-Euro-107982291992533

                          Comment


                          • #14
                            Just got home and someone has nicked the two sensors out of my van
                            I reckon we should have an answer soon.

                            I suggested wiring, as some of it is a bit ratty.

                            Give us an update Brenton.
                            sigpic Camden GTI Performance. VW / AUDI Specialists
                            All Mechanical Work, Log book Servicing, New and used Parts and Imports
                            19-20/6 Badgally Road, Campbelltown, 2560
                            02 4627 3072 or 0423 051737 www.camdengti.com

                            Comment


                            • #15
                              One thing i would try and this cured a PB engine Gti with similar issues. Go straight to the ECU and find the earth. cut from main loom and then run from ECU to a solid well known Ground point and try it. Dont loom it up this stage in case of no fix but just run a length to ground. High resistance over time can affect the ECU. They are very tempremental. And age does get the better of them. Sounds like wiring as you say the lom is ratty. I would try the earth thing man. The Golf i did has been sound ever since, this too is digifant, Trans is digifant (early) or SIMOS.
                              GIve us an update.
                              CHeers
                              Alba European
                              Service, Diagnostics and repairs. Mobile Diag available on request
                              Audi/VW/Porsche Factory trained tech 25+ yrs exp
                              For people who value experience call 0423965341

                              Comment

                              Working...
                              X