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TDI Power Enhancements Discussions about increasing the power of your TDI engine. i.e. chips, injectors, powerboxes, clutches, etc. Handling, suspensions, wheels, type discussion should be put into the "Upgrades (non TDI Engine related)" forum. Non TDI vehicle related postings will be moved or removed. Please note the Performance Disclaimer.

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Old March 8th, 2018, 01:30   #1
ben0069's Avatar
Join Date: Oct 2012
Location: wales
Default Acclerator issues

Might be wrong forum but hoping someone can help explain this to me.
I'm having some issues with my accelerator, car is audi allroad
2.5 tdi v6 2004. Lots of mods and mapped.

When I steadily rev up from idle( stationary ), as I hit 2200 revs the revs drop down 400 rpms, but my foot has remained in the same position.
I have looked at data measurement blocks, channel 01
IQ fluctuates between 1.88-2.60
RPM at idle is 745-765
Idle Stabilization at idle fluctuates between 25.00 -26.85 deg kw
when I rev as above and the stabilization reaches 50 deg kw it drops back to 30.
I don't know if this is normal
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Old March 8th, 2018, 07:40   #2
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Join Date: Aug 2008
Location: Reno, sort of...

Is it possible you have turned on the launch control and are not aware of it? And/or you might want to check your clutch switch: I personally went through something very similar and found out my clutch switch was faulty.
2001 Jetta GL TDI, Tinted, Ventectomy, Catectomy, EGR-ectomy, Stage 4 Custom TDTuning, PP764's, Stealth 17/56 Garrett, VCDS Hex+CAN, South Bend Daily Driver 2 Clutch, DG Short Shifter, Previous Diesel: 1983 Rabbit Diesel

Last edited by Nevada_TDI; March 8th, 2018 at 07:49.
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Old March 8th, 2018, 11:00   #3
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Join Date: Oct 2012
Location: wales

I don't have launch control on the vehicle, will have to check clutch switch, thanks.
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Old March 9th, 2018, 14:32   #4
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I would start with double checking that F, F36 and F47 in the cruise control measuring blocks are all "0" when the brake and clutch pedals are at rest. F and F47 also need to switch at the same time when the brake pedal is pressed.
David Marshall
Fast Forward Automotive
TDI Stand Alone Wire Harness Manufacturing | Signal Converters, Gateways, and Processors | Vehicle Speed Sensors | Malone Tuning
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Old March 11th, 2018, 11:08   #5
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Join Date: Oct 2012
Location: wales

Thanks Hasenwerk, I have tried those and they are working ok
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Old March 11th, 2018, 18:46   #6
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Join Date: Nov 2005
Location: Great Britain
Fuel Economy: 35-45mpg

Does the car drives as it should ? Might be a duff accelerator pedal and messes up drivers wish maps... can you monitor the accelerator pedal whilst doing so against IQ and rpm’s ?
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