GOLF82

Hi my names Gary was at the cow roast meet to night,
A very kind gentleman hooked his laptop to my motor and we went for a spin,
you was going to send me some info of my fault,
mine was the blue golf gti turbo,
many thanks,
Gary

Hi there...that was the wonderful Mr Calimori....he popped mine on too...good lad
I split your post from the welcome one if you was wondering what happened.
Welcome to the club

Welcome to the club Gary.
That laptop ran out of power when I got home so is being charged, I will try to get the info off for you tonight or tomorrow. I think your engine was running quite well so hopefully just a sensor will be all you need.

Hi and welcome mate.

Thanks guys
Can't wait to have have her sorted.

oh hai!

I will post these here and we can chat about them:

16705 - Engine Speed Sensor (G28): Implausible Signal
P0321 - 35-10 - - - Intermittent
16486 - Mass Air Flow Sensor (G70): Signal too Low
P0102 - 35-10 - - - Intermittent
17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)
P1297 - 35-10 - - - Intermittent
17704 - Error in Mapped Cooling System (check Temp-Sensor and Thermostat)
P1296 - 35-00 - -

After reading the errors we re-set them and took the car for a drive, serious errors will get recorded again quickly whilst intermittent and less serious ones need re-appear over time. For some things, once the problem is fixed the error will go away whilst other times they need to be cleared.

We checked that the MAF was giving a correct reading and checked to see if the boost matched for expected and actual readings.
We also took readings for the way the engine was adapting it's map, these two figures can tell us if they was a vacuum leak and a turbo leak.

Highest Gas Airflow was 123.64 which is a little higher the expected 120 g/s but acceptable. The MAF is reading air pretty much as expected and I doubt the 16486 error relates to the slightly high reading.

Highest boost readings came out as 1500.0 (expected), 1550.0 (actual). The 'actual' reading is higher than the 1500 that would be expected in a perfect world but nothing to be concerned about. It is interesting that the 'actual' boost is slightly higher than the 'expected' but the % is low. The important part is that the two figures are tracking each other and so the boost being made is not being lost.

The adaptation figures tell a slightly different story, the first give idle figure of -3 and the the second give under load and combined an all conditions of -7.8. So the ecu has to adapt these amounts under those conditions.

First off, both are perfectly acceptable and would not cause a serious problem. -3 would relate to vacuum conditions and indicates that there is a vacuum leak. Of course there is, the car is 8-9 years old using the original pipes, it is not serious but my car read -0.3 after replacing a lot of the pipes.
-7.8 indicates a boost leak of some sort, again perfectly liveable with, anything +-10 would have been 'acceptable' but it could be better. This agrees with the error that there is a boost leak and yet the 'actual' reading indicates that additional boost is made?

So after a quick second run only the following error returned:
16705 - Engine Speed Sensor (G28): Implausible Signal
P0321 - 35-10 - - - Intermittent

At present I do not know what sensor this might be but hopefully we can track it down on one of the other forums.
In summary, I think this is the most likely error seen to be the cause of your hesitation above 5000 rpm, a boost leak is not going to cause that, a poor MAF might but the readings show that it consistently reads correctly. More investigation is needed.

Welcome to the family

Thank you Mr Calimori,
going to crack with this today and see what i can come up with,
going to order my dump valve in a bit,been told that the ones on there can fail anyway,
what other forums are there? i know off uk-mkivs but any other good ones?
thanks bazza loving the scircco.

Yep, the recirculating/dump valve can go. I use a Forge one, it is best to not get one that dumps to atmosphere as the engine doesn't like them. Replace the original clips with strong jubilee clips is also a good start.
I don't have my links on my work computer so can't remember the names of the other forums.

Edition38.com

Welcome to the nomads dude!