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Hello, I finally found a few hours to tinker on the A6. The idle shudder due to the big bosio r683 drove me insane, also moving on and off the throttle when rolling wasn't 'clean' The problem is the idle stability control that can't cope with the r683's, undershoot,overshoot ... you can see...

Hello, Aren't you running the custom exhaust fjtwelve had made for the car ? He had already ditched the soot filters if I remember correctly ? Wow, hold on, I don't think you can install the solid AKE cams in a BDG or BDH head, the profiles are specific for the roller rockers, it won't work. I...

After installing the R683's and a 3 bar MAP sensor I have the same problem, when doing 1/4mile sprint the engine dies of fuel starvation, which is murder on the VP44. It sounds as exactly the same phenomenon as you described. I think the (tiny) in tank fuel pump just can't keep up under these...

Hallo, Ich schreibe mal auf deutsch. Wenn du deine Düsen auf 250bar eingestellt hast sollte wahrscheinlich das Problem des Rücklen bei Leerlauf nicht mehr vorkommen. Das Qualmen jedoch wird hierdurch nur sehr geringmäßig besser sein gegenüber 180 oder 220 bar Öffnungsdruck. Das Pumpenrad...

I changed to my other set of tyres/rimms on the front today, vibration and grinding noise is gone !! Very strange, I don't see anything wrong with the rims and tyres, vibration I could understand from a tyre having a blister, but that horrid grinding noise is a mystery. I can't see any rubbing...

That's interesting and would also match with following estimation, stock AKE injectors flow enough for max 210hp, yours are 40% bigger, given the engine will have the same thermal efficiency at higher power levels (which it won't), it would produce 1.4*210=294hp. Taking in account the extra heat...

I think the R683's are way bigger, I think about 80% more flow than the stock items. When I compare that to the 8 hole .16 you have they should flow about 33% more than the 6 x .16 Now I must find out how to increase the opening pressures, the stock injector body of the 683 is set to open at...

Disconnecting the temp sensor isn't the right solution either, sometimes she still shudders and also injection timing is just too advanced. I guess the only thing to do is reducing idle speed to minimum over adaptation channel in the ECU and installing a resistance in the throttle position...

Hook up VAGCOM and use the TDI timing checker, like that you are sure the timing is within spec. When it was set correctly using opening pressures at 180 bar you will see that it has shifted a bit at 250 bar, if outside the two lines you should correct timing and measure again. B.R

Sounds serious, when I hear you describe how much soot she's coughing out I fear that driving WOT at top speed on long stretches isn't healthy ! Exhaust temperatures risk being much to high cooking the turbo, exhaust valves and head gaskets... White smoke could indicate that coolant found it's...

Adjust them to 250 bar, should be fine. I also plan to increase the opening pressure with 250 bar in mind. Check the injection timing after you install them, injection will be a little retarded by increasing the opening pressure by that much. I got the car home this afternoon, and what do you...

hummmm, after a midnight walk of about 6km I can say that by deconnecting the watertempsensor I got a crystalclear 950 rpm idle, less smoke and better power allround. The shameful thing is that stupid me forgot that the boardcomputer is about 120km off on calculating the remaining distance that...

And here a picture in close up...

here you will find a picture where it is indicated under nr 10 Kennisgeving voor omleiding

when you take the engine cover you should see it, it is located in front of the oilfilter, it sits in a black metal waterpipe, you only need a small screwdriver or pocket knife to press the little platic locking clip on the connector and at the same time pull the connector off. I think it's a...

:-) I think you are experiencing the same troubles with the R683 nozzles as I do The most important thing that I learned from the R683 experiment is that the stock VP44 can deliver MORE than enough fuel, judging from the massive black cloud it should be enough for 300+ hp in combination with...

idle shudder has to be caused by the idle stabilisation going crazy. When you observe injection timing and IQ with vagcom when it starts to shudder the values jump around, from 17° CA to 0° and between 0 and 5mg/stroke When cold, just afer engine start, shudder does occur less, just as you...

I also fitted the Bosio R683 last week. I am getting very rough running at idle, it can best be described as 'misfiring', The nozzels were installed in the 'old style' injector bodies (AFN engine ?), index A. Opening pressure of the first stage is 180bar which is 40 bar lower than the stock AKE...

yes, that is also worth checking, it could be the shutoff valve sticking in an in between position, not allowing enough air to pass. However it won't be in the solenoid or the vacuum tubing because the engine just would stall and wouldn't start since then the valve would be totally shut. If it...

:-) glad to hear there is improvement. Be careful with the thin plate you made, I once made one from 2mm thick steel plate and after 1 year there was a hole corroded right through. It seems the exhaust gasses work pretty corrosive on ordinary steel, that's why I now use a stainless plate. I...