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Old 03-22-2013, 06:51 AM   #1
mpristave
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Default Throttle by wire pisses me off.

I've driven a few drive by wire cars, my previous being a 350z, but in this WRX it's really pissing me off. It has ridiculous amount of rev hang, and it will even rev slightly when i depress the clutch stopping, that I thought there was something wrong with the throttle, and took it to the dealership. WAD of course.

Anyone else have this happen on their Subaru? It's annoying to me.

I drove a Chrysler the other day and the throttle lag on that was hilariously bad as well. I have a feeling whatever computer controls the throttle on that my watch could do a better job.
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Old 03-22-2013, 07:06 AM   #2
Jack
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Never had a single issue ever with an 08 LGT. Fine on the track, with double clutch heel and toe braking downshifts, fine on the street. I drove it 91k miles. The wife's Outback is drive by wire and I never even realized it until last night when I was getting code pulled at autozone and the guy wanted to tweek the throttle and couldn't find a throttle cable. Meh
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Old 03-22-2013, 07:09 AM   #3
HinshawWRX
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No issues here.
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Old 03-22-2013, 07:21 AM   #4
Dat8687
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I get rev hang in my 04 wrx Cable... I hate it.. Compared to my last to DBW cars
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Old 03-22-2013, 08:29 AM   #5
jebjkey
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There are tables in your ECU that control this feature. The settings from the factory are for smooth on/off throttle response at lower speeds.

If you have an AP you can download ATR and get rid of the throttle hang by adjusting the appropriate tables.

I remapped both my throttle response and off throttle response so that the throttle responds the way I want it to when I push the pedal and it does not hang when I release the pedal.
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Old 03-22-2013, 09:04 AM   #6
Jack
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Quote:
Originally Posted by jebjkey View Post
There are tables in your ECU that control this feature. The settings from the factory are for smooth on/off throttle response at lower speeds.

If you have an AP you can download ATR and get rid of the throttle hang by adjusting the appropriate tables.

I remapped both my throttle response and off throttle response so that the throttle responds the way I want it to when I push the pedal and it does not hang when I release the pedal.
There are indeed.

Legacy GT and STi (maybe some WRX now) have SI Drive which drastically alters throttle response through the I and S# modes. I tended to drive in I mode and when I switched to S#, I felt like someone turned on nitrous or something.
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Old 03-22-2013, 09:07 AM   #7
Atomic Rooster
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I always thought/guessed that the negative bahaviours are caused somply by having a turbo. The fact that the pressurized air is forcing it's way into the engine is what causes it to seem like the throttle is open wider than it is until boost pressure drops.

Perhaps future throttle by wire computers can be programmed to make a turbo engine behave more like naturally asperated engine.
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Old 03-22-2013, 09:11 AM   #8
P-Train
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it annoyed me too, get it tuned
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Old 03-22-2013, 02:59 PM   #9
greenplates
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Tune may be my next stop, I got used to the throttle hang
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Old 03-22-2013, 03:07 PM   #10
Not-EWRX
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My mom had one of the First mercedes with drive by wire. It would take a full second before it would respond.
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Old 03-22-2013, 03:47 PM   #11
rwfloberg
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Casue your not double clutching and granny shiftin like you should.
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Old 03-22-2013, 03:47 PM   #12
findurpath
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jebjkey is right. I dealt with it for 2 autox seasons before I finally got it tuned out after my rebuild. Mine was pretty bad and un-nerving when I was WOT into a chicago box or about to approach my braking point and for a full second after I let off, I'm still accelerating/propelling forward.

Now, the throttle response when letting off is instant.
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Old 03-22-2013, 04:29 PM   #13
10splaya22
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Quote:
Originally Posted by mpristave View Post
I've driven a few drive by wire cars, my previous being a 350z, but in this WRX it's really pissing me off. It has ridiculous amount of rev hang, and it will even rev slightly when i depress the clutch stopping, that I thought there was something wrong with the throttle, and took it to the dealership. WAD of course.

Anyone else have this happen on their Subaru? It's annoying to me.

I drove a Chrysler the other day and the throttle lag on that was hilariously bad as well. I have a feeling whatever computer controls the throttle on that my watch could do a better job.
Its in the ECU, it doesn't have to do with the DBW. Its mainly for emissions control from what I read.
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Old 03-22-2013, 05:12 PM   #14
Gallo2011
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Mine does this too. From what I've read, Honda products are even worse, so it's not something unique to Subarus. Throttle hang is a little weird at first, but you get used to it. As others have said, it can be adjusted with a tune.
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Old 03-22-2013, 06:53 PM   #15
Preludicrous
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Isn't there also a piggy-back type product that you can wire into your system and allows you to adjust and control just the dbw characteristics? I swear I saw a thread about it on here recently...
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Old 03-22-2013, 07:08 PM   #16
10splaya22
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Quote:
Originally Posted by Preludicrous View Post
Isn't there also a piggy-back type product that you can wire into your system and allows you to adjust and control just the dbw characteristics? I swear I saw a thread about it on here recently...
Yes there are but it needs to be tuned out with the ECU
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Old 03-22-2013, 09:00 PM   #17
NCORWRX
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Quote:
Originally Posted by Jack ffr1846 View Post
There are indeed.

Legacy GT and STi (maybe some WRX now) have SI Drive which drastically alters throttle response through the I and S# modes. I tended to drive in I mode and when I switched to S#, I felt like someone turned on nitrous or something.
I notice a slight lag in throttle response, even in S#, when upshifting.

I just had mine O/S tuned. I = 40% WOT @ WOT S# = 100% WOT @ WOT. The tuner asked if I wanted S and S# to be the same, since it reverts back to S or I but not S# every time you restart the car. But I just left it alone.
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Old 03-23-2013, 06:16 AM   #18
jebjkey
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Quote:
Originally Posted by efcywfqa View Post
The settings from the factory are for smooth on/off throttle response at lower speeds.
Sounds original.




hint if you are confused, look at post 5.
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Old 03-23-2013, 02:10 PM   #19
JSchell1309
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Quote:
Originally Posted by rwfloberg View Post
Casue your not double clutching and granny shiftin like you should.
The humor is lost when you butcher it that bad.

Quote:
Originally Posted by jebjkey View Post
Sounds original.

hint if you are confused, look at post 5.
He's a spam bot. Already been deleted. If you see stuff like that in the future, just report them as spam. They will be deleted quickly.
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Old 05-07-2013, 07:28 AM   #20
CPC
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Anyone point me in the direction for instructions on how to tune this out? What tables, where? Thanks.

Chris.
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Old 05-07-2013, 08:29 AM   #21
SpamBot
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Quote:
Originally Posted by 10splaya22 View Post
Its in the ECU, it doesn't have to do with the DBW. Its mainly for emissions control from what I read.
Ding ding ding! Yes, it's emissions related.

[quote=J
He's a spam bot. [/quote]

Imposter.
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Old 05-07-2013, 08:31 AM   #22
turbogc8
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Twm has a pedalbox available to customize how the throttle reacts to your input.
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Old 05-07-2013, 09:41 AM   #23
JSchell1309
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Quote:
Originally Posted by CPC View Post
Anyone point me in the direction for instructions on how to tune this out? What tables, where? Thanks.

Chris.
http://forums.nasioc.com/forums/show....php?t=1537010

Give that a few read throughs. That should have everything you need.
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Old 05-07-2013, 09:52 AM   #24
Kinjirra
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Quote:
Originally Posted by turbogc8 View Post
Twm has a pedalbox available to customize how the throttle reacts to your input.
Wouldnt touch that with a 10ft poll.
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Old 05-07-2013, 11:30 AM   #25
subezero
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Get a Torqued Performance map..eliminated any and all TBW lag I had.
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