Carlos8542222

Hey guys:

Is the Tsx the only Acura vehicle with Fly by Wire where the gas pedal is linked only electronically (and not with a physical cable) to the fuel throttle? Do the RSX, TL, or RL have the same system?

kabota

TL does

Motohip

Isn't it drive by wire?

Xtremespeed2102

ive been wondering about it. is it really all wired? when the car is off n i have the drivers door open in my garage n i put my foot to the floor i can hear the throttle open up. like when u hear the thing open u hear a tap so it doesnt open ne more.... is that the pedal that i am hearing?

YBA

My NSX does have electronic throttle (or drive by wire)...

Canyonball

Yeah, the NSX was the first to incorporate the drive-by-wire system, atleast in Hondas.

NJtsx

Alin10123

"Fly by wire" is in fighter jets and commercial jets.
Basically since the control surfaces on the commercial jets are so large. Along with the fighter jet's surface, since they need to pull sharp maneuvers, human muscle alone would never be able to pull it off going at high speeds. So there's actually hydraulics that move the control surfaces.

goddsmack

either way, I still prefer mechanical linkage in throttle control, every car these days is drive by wire, even freakin trucks!

Alin10123

It supposidely helps with emmisions. This way nobody can just gun it. When you gun it, it allows a ton of dirty exhaust to come out. If it's drive by wire, the electronic throttle can engage a little slower. That way the emissions will be cleaner.

Just like the Toyota Tundra. It's a 275hp truck that can't do burnouts. I mean, a pickup with no weight in the back and a V8?
Well... it's because of the drive by wire system. They put that in there so that it could be the first ever ultra low emmissions V8.
It's a little annoying to some folks. But if you drive it normally, you actually can't tell the difference. Only when you are trying to race you can tell.
But it's still a nice truck nonetheless.

poltergeist

????
Don't know who told you that but you've actually got it backwards. A very slight delay in closing the throttle plate can reduce emissions, as cutting off intake air all at once causes the mixture to go slightly rich. The primary reason though for DBW throttles is for VSA control, as the ECU will reduce throttle opening slightly in understeer conditions.

Delaying throttle opening on accel would do nothing to reduce hydrocarbon emissions.

ndx2

^yup, rather than VSA just using brakes, it can control/reduce the throttle to help control the car.

Tsx536

Does having VSA on take away any power?

poltergeist

Having the VSA "active" (ie. not turned off with the override switch on the dash) does not affect power output. Only when the VSA is actually functioning and even then, only if the car is understeering does the VSA reduce engine power output.

sauceman

Only on 2004 models: https://acurazine.com/forums/showthread.php?t=22171 post #4

GIBSON6594

yup, gives the car a nice boost...04 05

CGTSX2004

iTrader: (1)

I remember that thread...

gundamZZ

fly by wire?! haha

i wish the tsx can fly by wire....then it wouldn't be bit*hed at for not having enough power

Motohip

The DBW makes it easy for the engine and auto tranny to work seemlessly together also.

Tsx536

The reason I asked was because with Hondata, Injen intake, and headers, I have noticed more hesitation at VTEC with VSA on. If I turn off VSA, I can definitely notice less hesitation/dip at the Vtec engagement point. Triz who has the same setup as me, has also noticed the same thing. In theory, it doen't make sense to me, so I'm trying to figure out what the cause might be.

Do you guys think that disabling VTEC effects the throttle response at all?

kaikai114

Fly by Wire? Too much grass perhaps, causing hallucination?

TL and RL both have drive by wire, RSX does not

poltergeist

The VSA being "on" should not have any effect on throttle response (unless the car is actually starting to slide) or iVtec/VTC operation. I've never experienced what you describe with my car (stock) whether the VSA is enabled or disabled.

Wonder if it's not a bug in the Hondata reflash?

Tsx536

This is only present on a 5AT with Hondata.
And it might also only be with the Injen intake. I'm still trying to figure that out.

It all doesn't make any sense to me, but I know I can feel the difference. I thought it was just me at first, but someone else also experienced the same thing.

kaikai114

interesting, i will have to give it a try tonight and see what i feel

Tsx536

^^ Sorry if my post was unclear. When I said that is might only be with Injen. I ment that is was only with a 5AT with Hondata and Injen intake, not just the Injen intake alone.

When I only had the Injen intake, I didn't feel any hesitation at Vtec.

goddsmack

You're correct on both issues, and in fact they try to run cars as lean as possible these days because of emission issues. We demand alot of our vehicles, we ask them to idle as quitely as possible, have little vibration, yet produced alot of horespower while operating many accessories (a/c, p/s, alternator, etc.)...all the while being clean emitters.

I do also have a '02 Tundra and although the throttle is a cable (last year they made a cable linkage), the movement of the butterfly valve in the throttle body is still electronically controlled by the cable movement and an actuator. Older cars, you could rotate the valve on the side reel and the plate inside would move dependant of it. I don't know, I prefer hard linkage to electronically controlled items, if things go bad, your stuck with limited range and a more expensive repair as far as parts. The worst vehicle....the new Toyota Prius, everything from braking, to steering, to the tranny is electronically controlled.

Carlos8542222

test

JaySpec7

my first post...

The NSX uses fly-by-wire throttle but also has fly-by-wire steering which is server controlled...