I know the TSX is drive-by-wire and there has been some discussion of the unnatural throttle response. No biggie, my old Jetta 1.8T was drive-by-wire too.

However, the TSX does something that seems odd to me and I just want to be sure that it is just "the way it is" rather than something weird going on.

With the 6MT at highways speeds, if you are coasting it seems impossible to re-engage the throttle smoothly. No matter how gently you reapply pressure to the accelerator, it seems that there is a slight but abrupt jerk when the ECU begins to resupply fuel to the motor again.

Does everyone's car do this? (This is a 2007 TSX) Those with an AT might not notice it as much as the hydraulic torque converter would tend to absorb this.

 

Mine does as well. I think its normal. That bit of a 'jump' can get annoying.

 

Normal. Sucks, but normal.

 

OK, thanks for letting me know.

Interesting that the philosophy is so different than what was in the VW. The VW drive-by-wire system actually seemed to "ignore" very slight movements in the accelerator when cruising, not to the point that it bothered you or you were really even conscious of it, but it made it very easy to keep the car at a constant speed without surges or pauses. I noticed this mainly when other people drove the car who were notorious for constantly slowing/speeding up/slowing/speeding up when driving on road-trips.

 

since this topic was opened, when I am feathering the clutch to slowly exit a driveway etc.... sometimes the TSX just jerks hard forward and then keeps jerking until I shift into second, regardless of where the throttle is. Example: when it happens I can push the pedal to the floor and it'll jerk all the way until i shift to second or push the clutch back in.

Is this also drive by wire or am I just not paying enough attention and not giving it enough gas? *no one take that as a pun to the first question it's an ACTUAL question/problem I've been having*

 

Mine has done this, too, but just two or three times. I've only had the car a month, so I wasn't sure if this was me or the car.

The TSX fly-wheel is on the lighter side (only 15 lbs), so I've decide that I need to give it more juice when feathering out the clutch (say 1500-2000 RPM's), whereas my last car had a heavy flywheel and it was easy to slip it at 1000-1200 RPM on starts. So far, that has seemed to make starts smoother.

 

That's not normal. Sounds like a problem with the car or more likely the driver.

 

Driver. Thats usually caused by coming off the clutch too fast.

 

When I experienced this, my foot was completely off the clutch, and as I accelerated from 1st to 2nd, it seemed like the ECU couldn't "center" on whatever the accelerator was feeding it.

Surge-stall-surge-stall-surge-stall until I shifted into 2nd.

The clutch was completely out of the picture at this point.

 

Exactly what I'm talking about, can take off in second and not an issue.....you experience that as well? Like feathering in second gear low RPM and no surging just the typical shaking from being in the wrong gear at too low of RPM lol

 

Its happens to me on occasion as well. If it wasn't caused by driver error it would be something that occurs each and every time you start moving from 1st, but it doesn't. It only happens when you come off the clutch too early. Its a quirk.

I'm sure its a DBW related but its easily rectified once you figure it out.

 

So what part of "off the clutch" did you not get?

 

Yep, experienced it before and it seems to be either the Throttle Position Sensor is feeding the wrong signal to the ECU or the ECU is interpreting it incorrectly. When it happens, it almost feels like riding a horse. It doesn't happen all the time but it does happen if the throttle input is less than a certain percent. I usually just give it more gas and that seems to reduce the problem.

 

I see your point, but I thought you were actually talking about something that occurred while the clutch was being disengaged (e.g. clutch chatter, shuddering etc. related to the contact of the clutch pressure plate and flywheel).

 

Yes, that's exactly what it feels like. I just started slipping the clutch at higher RPM (e.g. more gas), and that seems to avoid confusing the sensor.

I wonder if the same thing happens in 1st if you let the car idle without any gas and then try to accelerate.

 

i wot my auto tsx yesterday for the first time, pulled nice and all but it took like 2 seconds before everything engaged. dbw blows..on my auto 88 civic, the second i wot, the tranny downshifted to a lower gear and began pulling. i wish dbw was never invented

 

hey i no this post is old but i have a 2005 tsx a/t. ive driven it for about 3 going on 4 yrs. i went from a cable throttle to dbw and hated it. now iwent for a spirited drive and was so pissed. theres these back roads with twists and turns and theres his one hill that i came to and was so mad. i drove in ss mode until i came to the one tight turn and shifted to "D" so it o=would downshit as i came out. fine i came to 1/4 of the hill in 3rd gear still in "d" doing about 25mph because the car wouldnt downshift to 2nd or even 1st and i put my foot down and nothing. i know other people have this dbw lag in there tsxy's but im feed up with it. id much rather switch it to a cable throttle. has anyone had this problem and found a way to fix thins?

 

Mines a 5AT. Noticed that in stop start traffic that I get the above issues. Blame the gas pedal design.

 

I blame the massive torque gains from the reflash...

 

https://acurazine.com/forums/1g-tsx-problems-fixes-128/squeeking-clutch-795229/

I have not been complaining - I just thought that was the way all TSX's were - but the dealer seems to have fixed my drivability issues by bleeding the clutch master cylinder. I wish I'd said something 4 years ago.