All Things Mk5 > Performance Modifications

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edd666999:

--- Quote from: GrayMK5GTI on July 15, 2013, 12:33:27 pm ---Have you had the car flashed back to stock?

Does it still make the noise?

--- End quote ---


--- Quote from: Marshall on July 15, 2013, 12:56:23 pm ---Been away for the weekend so not yet.

--- End quote ---


--- Quote from: GTI-Ross on July 15, 2013, 06:11:44 pm ---So if car is back to standard and no boost leak or knocking noise....are you confirming it was the map?

--- End quote ---

So i doubt it.

PDT:
and when the 1.4 tsi engines started falling to bits, everyone blamed maps but stock ones were suffering the same failures. The early days of 1.8t tuning when coilpacks were dying within days of the remap, Injector faults on the 170ppd that turned out to be a recall, Boost issues and ABS lights on the Focus St 225 that turned out to be faulty MAF's, Low boost on the PD130's that is almost always a gunked up MAP sensor, .... it always gets blamed on the map but it almost always is an underlying issue.

In this case we knew it wasnt a software fault because we have 14 other 170cr engines with the exact same software and hardware versions that we compared Kevs map with and all were within a few percent of eachother, we dont re-use maps but find that when we finish tuning a stock car with the same stage tune that the changes we have made within the maps are always very similar. This is a good thing because it means that fault diagnosis is easier and we know what has been altered and by how much.

In Kevs case we also upgraded him to the latest software version for his ECU that we have, this is what stopped the noise he was getting at low RPM. The new vag 170CR software demands a lower rail pressure when pulling awa, they have also lowered rail pressure demands on the 1.6CR for a very similar issue.

GTI-Ross:

--- Quote from: Marshall on July 15, 2013, 09:34:18 pm ---
--- Quote from: Marshall on July 15, 2013, 02:00:00 pm ---What's even more strange is
I've just got back and went to my car which I'd disconnected the battery on before I left( thought I'd give it a try)
Only to find the car drives fine and no boost leak noise!!
So there's no way it was a hardware problem.
I'm pleased the car is back to normal but can't understand why.
Temp has dropped to 21 degrees here if that would make any difference and the only other thing that's been done is the battery disconnected.
Opinions welcome

--- End quote ---
This is for Ross
No never had the car returned to stock, as above

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Oh sorry, i thought i you left the battery off for a period that the map gets removed,

GTI-Ross:

--- Quote from: Marshall on July 16, 2013, 03:13:44 pm ---Now done 100 miles with the car and it seems to go alright but mpg isn't great.
Sitting on cruise at 70 mph the trip is on 44.6mpg and that took 40 miles to get to that.
Previously the computer read 53.1mpg and that was everywhere at 80mph

--- End quote ---

Sounds worse off. Need some new map actions.

GrayMK5GTI:
Could be down to driving into the wind, majority uphill etc.

Generally on light throttle your fuel economy would be about the same with or without a remap. You would need to do several journeys before you can state the map is at fault

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