Occasional overboost cutout?

[porkkis]

That's right. If you managed to find out that, you don't need to replace it. Just clean it well.

[newsh]

That's right. If you managed to find out that, you don't need to replace it. Just clean it well.

Hmm, sucking on it gave me a nasty taste in the mouth I can tell you

[frjd]

Hi

Did you find the solution to this problem, I have expirenced the same problem two times.
First time it cutout every time I gave full gas, (guess overboost) there was
no cutout with just almost full gas. It did this several times on this drive, but after
a short stop (engine turned off for mayby 5 minutes) nothing happend for many
month, then 14 days ago, it did it again, exact same problem, and again it went
away after I stoped the engine. - And nothing since. What Im afraid is what happen
if this happen in the middle of a overtaking.

Now mayby my description can help solve the problem, I also would like it fixed...

Every now and then, maybe once a week or so, ( yesterday I drove about 500 miles it happened 3 times), I get a cutout at full throttle.
Because its so rare I always miss what rpm and boost pressure, I always back off and or change up when it happens. I think yesterday I saw the boost gauge hit 30lb once just after it did the lurch,(car is mapped for about 25-27lbs, I think, Mihnea?) usually happens in a high gear and I think usually at around 3.5 - 4k rpms. If you floor it again immediately after, it is fine, so its not going into limp mode.

Any ideas guys?

[frjd]

I did it again, this time I cut the engine, and started again, and the problem went away.

[Dr H]

Sounds like mine - have you checked the fault codes? I'm getting 2224.

[frjd]

Sounds like mine - have you checked the fault codes? I'm getting 2224.

Sorry, I do not have access to a vagcom or other tool to readout errors.

[Dr H]

All you need is a 12v LED and a short piece of wire to read the codes.

See www.s2central.com under technical > engine and tuning > Motronic ecu > diagnostics > blink code pages

HTH

[frjd]

I did it again, this time I cut the engine, and started again, and the problem went away.

Two times more, again "rebooting" (engine off/on) the car eliminate the problem.

[frjd]

Sounds like mine - have you checked the fault codes? I'm getting 2224.

The failure happend 12/7 again I turned off the engine, and again it run fine.
It really seems to me to be a computer error, how else can the error be gone by restarting the engine.

Today I got my vag-com. I read out this:

00561 - Mixture Adaptation 13-00 - Adaptation Limit (Mul) Not Reached
00513 - Engine Speed Sensor (G28) 03-00 - No Signal


I then reset the error log.

This afternoon the error happend again. Again engine off eliminated the problem, however this time the error happend again within few minutes.

I then read out the errorcodes again, not I also got a 544, I thing it is strange that
this was not in the log from the previously errors since last year.

00561 - Mixture Adaptation 13-00 - Adaptation Limit (Mul) Not Reached
00544 - Maximum Boost Pressure Exceeded 27-10 - Implausible Signal - Intermittent
00513 - Engine Speed Sensor (G28) 03-00 - No Signal

[frjd]

This also point to the MAF beeing the problem.

http://www.s2forum.com/forum/showthread.php?t=10140&highlight=maf

But what the hell is a MAF???

Found it: http://s2central.net/ds_G70.html

[A6 2,7Biturbo]

Friend of mine had same problems with his S4 2.7T...

Replaced MAF and problems were gone...


Many MAF's fail these days, especially those on turbodiesels...
Bosch knows about this problem(price dropping of MAF's) but doensn't seem to come with a solution...

[audiman]

The Mafs on Tdi's and the later type S4 ones are totally different. On the later cars they can be unplugged and the ECU will ignore them. Cant do that with the ice age technology on the S2

[A6 2,7Biturbo]

What's of an MAF for the S2 anyway???

[audiman]

Huh?

[A6 2,7Biturbo]

What's price of an Maf for an S2 I mean...

Typed a bit to quick there...