All Things Mk5 > How to Guides / Troubleshooting
Tuning Problems
DarrenC95:
So my MK5 GTI is currently at the tuners after finishing my K04 Conversion,
It's there 3 days an the guy rang me to say hes having a bit of trouble the car is not boosting properly, when he looked into it, it shows that although the throttle pedal is at 100% it's actually only opening 80% so he will need a little time to figure out what the issue is he said it made 265bhp the way it is car us been tuned at 95ron as here in Ireland you can't get any better so I'm hoping for 300
Anyone ever came across this problem before see below parts fitted
K04 Turbo (Used from S3)
S3 Injectors (Used)
S3 Alloy Intercooler with pipework
R8 Coilpacks
New HPFP (with VIS Internals fitted)
New Low Pressure Sensor
4x NGK BKR7EIX
200 Bar Rail Sensor
3 Bar Map Sensor
RS4 Relief Valve
3" Downpipe with Sports Cat
Intake Runner Flap Delete
New Diverter Valve
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LC5F:
Sounds like it needs the throttle body re-calibrated in VCDS:
DarrenC95:
--- Quote from: LC5F on November 06, 2021, 05:49:20 pm ---Sounds like it needs the throttle body re-calibrated in VCDS:
--- End quote ---
Thats what I thought but didn't want to sound cheeky sending that to the tuner hahaha
I'm sure he has tried this but I will ask the question anyways just incase
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DarrenC95:
I did have the battery disconnected while fitting turbo an according to this you have to do this adaption if you disconnected battery so I hope this is the case
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pudding:
Seen that issue before in K04 conversions where the tuner didn't tell the K03 ECU it's using the K04's 200bar sensor. The sensor scaling needs recalibrating. If he doesn't know how to do that, just put the K03 sensor back in.
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