After 3 months and 7k miles, I am now very very irritated by poor throttle response of the DBW when pulling away or reversing.
Its an all or nothing response that either leads to a near stall and kangerooing around or a sniff of clutch if a give it a bit too much revs.
Is this my own little problem or a "feature" of the hawkeye DBW?
If I took it to a dealer, what on earth would/could they do about this?

As the car will be remapped in the next month, is it something that can be mapped around anyway?

nick

 

2007 STI - throttle response issues - Factory 2.5L Turbo Powertrain - NASIOC

seems there is a fix for it in the States,my MD claims to have never heard of such issues

 

I've kept up to date with that thread but it isn't really what I get.
When under way there is no problem, its just the throttle response when pulling away up to 1750 rpm.

nick

 

With DBW is the throttle assembly different, I presume it doesn't have a cable running to it..?

Just curious as an 06 spec c I've looked at recently seemed to have a cable operated throttle. Is this because it's a spec c or jdm..?

 

Nick,

Apologies for resurecting such an old post, but did you find out what caused this and find a remedy..? Any joy with the dealer..?

Nige.

 

Pat at Scoobyclinic understands/can fix this. Remapped mates 06STi and the response is fantastic now. The reason its deliberately mapped so slow from new is to pass stupid emission regulations.

 

Hi Nige,
I didn't find a cure. Even with a 2nd remap after porting the turbo, nothing could be done to stop the poor repsonse when pulling away or reversing.
The turbo port really helped with reponse at 2-3k revs though and I'd call it an essential mod.

The problem is worst after an ECU reset. There seems to be a learning period for the throttle.
D1CCY - Is the SC fix really for the rev range 750-1500 rpm or above?

Nick

 

It can be mapped out.

There are a couple of tables in the ROM that relate to the requested torque values for various throttle positions versus rpm. The 07 STi has better values in here so it should be a simple cut and paste or if they are wanting to do a custom job on the map they can smooth them out by hand.

I am sure the mappers with Ecutek have access to these tables

Simple cure would be to launch at 2000 rpm though Butty

 

Nick,

I've driven mate's 06STi after remapping at SC. Seemed very responsive to me at all engine speeds, should be with about 380 ft-lb!. Best to talk to SC if you have a particular concern, Pat Herborn is ususlly there Thursdays and Fridays.

Cheers, Diccy.

 

Not experienced it in mine, presumably no 2nd gear pull offs at round abouts then ?

 

I havent experienced it in mine either but it is a simple fix.

 

Fingers crossed.. nothing with mine either yet.


Cheers,
Grant

 

Nige,
Are you having this problem now?

I'm not sure if Zen did this tweak or not on my remaps, but it is certainly not as bad as it was with the std map.
Reversing still catches me out.

Nick

 

This can certainly be mapped out by adjustment of the throttle maps. the ecu learns fuel off boost, ign throttle and boost on boost (or rather anticipates) so a reset destroys its hard work. pat knows about the throttle mapping btw and if he mapped it he can sort. makes a big difference to the car drivability

cheers

bob

 

Nick,

Regrettably, yes I am. It's a bit of a nightmare having to give it so much throttle just to pull off, especially if you're trying to sneak under the radar in a "D". I've stalled the damned thing a lot lately.

Got a few last ditch ideas to find out about whether or not i can get it to be like I want it to be before I decide to move it on. It's a rapid piece of kit and and on the move feels very quick and responsive, just not suited for me to skulk around town in or do my long motorway trips with "the bounce". Bit of a nightmare for me as I'm having the same trouble as before finding a performance car with four seats, a boot and that can tow...!!

Thanks for the info too Bob. The remap is something I'm seriously looking into now on this car, though I was hoping I wouldn't have had to on the STI..!! seems I was wrong..!!

 

Have you got a lightened flywheel or pulleys?

 

Nige,
I'm sure the remap will make towing easier as well. I found the torque gain from 2.5-4k rpm varies from 60 -100 wheel lbft which should help with pulling your snail.

Bounce? - is that the rear suspension oscillation on smooth roads? I've tried various tyre pressures but it never completely goes.

Another worthwhile tweak is to get the alignment checked. Mine seemed to have wheels pointing in all directions and resulted in bad tramlining. Cross country blasts are no longer a real workout and motorway journeys are less involving.

Nick

 

Hi Nick,

Towing..?!! Shhhhhhh....!!! The snail is fine at the mo, just needs a change down to fifth for overtaking at legal-ish speeds. So I stick to 66mph on the sat nav and that works fine, though I think a remap pretty much makes sense as it'll save me a downshift. Dragging it down to the south of France this summer - should be fun..!!


Yeah, that's the bounce/bob I mean. Flippin' annoying it is..!! I guess Prodrive springs will be the first step as I've seen one or two posts re the AST's not being "all that".

I had the alignment done quite early on up at Elite's in Rainham, though I suspect I may use Mocom to fit springs and therefore put the angles and dangles on my geometry.

Dynamix,
Nope, no lightened flywheel, though that's what it feels like.

 

Anyone else come across this throttle issue from idle to 1800rpm..?

 

my 06 2.5 wrx as hesitation from v low revs i know this is not stricktly the same but it made me wonder???????????

 

Never had staalling issues but notice I put my foot down and a few seconds letter we start to go. has anyone tried sprint booster as below?



Sprint Booster was designed to overcome the throttle response delay for ECT (Electronic Throttle Control) equipped vehicles, providing a crisper on-tap acceleration, at the drivers disposal.

What is Sprint Booster ?

More conventional throttle cables are now being replaced with an ECM (Electronic Control Module) which translates how hard the pedal is pushed into electronic signals in order to provide the power to the wheels. The ETC (Electronic Throttle Control ) also known as Drive-by-wire, unfortunately has its downside of delayed response and subdued acceleration, which creates problems in situations such as up-hill starts, quick gearchanges and overtaking.

Sprint Booster is a device that improves acceleration on drive-by-wire cars by continuously measuring and converting the digital signal providing the ECM (Electronic Control Module) with a new and altered signal.

Benefits:

Ultra responsive accelerator pedal.
Fastest throttle response possible.
Zero delay time in acceleration.
Big difference in the higher rev range.
Improved response for downshifts and safer overtaking.
Overall safety and more fun on the road.
It can be installed by you or at any authorised dealer in less than 10 minutes.

The Sprint Booster Power Converter will be the samrtest gadget you fit to your car.