Foot down isn't full throttle!

Bodge · 16-05-2008, 15:58

If I'm booting it hard on the motorway say, with my foot hard down, and then I lift my foot slightly off the pedal, the car actually goes faster!!

It's a little weird, as obviously you expect the car to slow slightly, not speed up slightly. I've gotten used to it now, so don't notice it as much, but I do need to sort it obviously!

I'm presuming the throttle valve needs resetting..... stupid fly by wire witchcraft!

How can I do this myself?

I have a Sealey Diagnostics tool, on which I can't find any function to reset the TB. So I guess I'll have to pop over to Awesome or someone to get it reset if I can't do it myself.

Cheers squires

claytarget_god · 16-05-2008, 16:10

isnt it something to do with fueling.

when you put foot flat on floor the petrol mix is v high and when you lift a tad it lets more air in so burnin hotter to give that boost????????????

if you can understand that.....

Bodge · 16-05-2008, 16:23

I see your point, and it makes sense.

But I assumed that the ECU would calculate the perfect AF ratio for max power, rather than letting the engine run rich at WOT (presuming that foot hard down is actually WOT).

Hmmm where's Ken? Wise words required....

Tom_vRS · 16-05-2008, 17:07

Yes I think a throttle body clean and adaption would be a good place to start. Shouldn't be more than an hours labour wherever you take it!

16-05-2008, 15:58	#1
Bodge Briskodian Join Date: Sep 2007 Location: England Posts: 672 Thanks: 94 Thanked 56 Times in 53 Posts	Foot down isn't full throttle! If I'm booting it hard on the motorway say, with my foot hard down, and then I lift my foot slightly off the pedal, the car actually goes faster!! It's a little weird, as obviously you expect the car to slow slightly, not speed up slightly. I've gotten used to it now, so don't notice it as much, but I do need to sort it obviously! I'm presuming the throttle valve needs resetting..... stupid fly by wire witchcraft! How can I do this myself? I have a Sealey Diagnostics tool, on which I can't find any function to reset the TB. So I guess I'll have to pop over to Awesome or someone to get it reset if I can't do it myself. Cheers squires

16-05-2008, 16:10	#2
claytarget_god Briskodian Join Date: Oct 2007 Location: Cardiff Posts: 564 Thanks: 56 Thanked 19 Times in 19 Posts	Re: Foot down isn't full throttle! isnt it something to do with fueling. when you put foot flat on floor the petrol mix is v high and when you lift a tad it lets more air in so burnin hotter to give that boost???????????? if you can understand that..... __________________ Done: PowerFlex Dogbone Bushes, Forge FMIC, CAI, forge DV, N75j, Longlife 200cel Cat 2.5" cat-back,Weitec GT coilovers, Whiteline 22mm ARB and S3 Front Lower Brace,SuperPRO Wishbone/Front ARB Bushes, Remap, LCR Front Splitter, Milotec front grills, 18" Team Dynamic Pro Race 1.2(StarSilver) To Do: TIP, Front Bumper: Milotec Side Vents, Middle Grill Cut-Out?, Milotec Rear Bumper Splitter, , VSport Custom Remap.

16-05-2008, 16:23	#3
Bodge Briskodian Join Date: Sep 2007 Location: England Posts: 672 Thanks: 94 Thanked 56 Times in 53 Posts	Re: Foot down isn't full throttle! I see your point, and it makes sense. But I assumed that the ECU would calculate the perfect AF ratio for max power, rather than letting the engine run rich at WOT (presuming that foot hard down is actually WOT). Hmmm where's Ken? Wise words required....

16-05-2008, 17:07	#4
Tom_vRS Briskodaholic Join Date: Dec 2004 Location: Fenland, Cambridgeshire Posts: 11,034 Thanks: 585 Thanked 373 Times in 255 Posts	Re: Foot down isn't full throttle! Yes I think a throttle body clean and adaption would be a good place to start. Shouldn't be more than an hours labour wherever you take it! __________________ 97/R BMW 328i in Boston Green. Don't miss the new DR COLORCHIPS GROUP BUY!

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