ohmstable

It's an 05 TSX (6 spd w/110,000Km) and I noticed that the car jerks whenever I completely let off the throttle and then back on it. It doesn't matter what gear but obviously it is more noticable in the lower gears.

For example in regular street driving if you're cruising at 60km/h in 3rd gear, you completely let off the throttle for couple of seconds then back on the throttle, the car will jerk and it is very annoying. At the same token, if you just ease off the throttle but not completely off, the jerking doesn't happen. It's only when you're completely off and back on.

Has anyone ever had this problem?

Any suggestions would be helpful.

zguy95135

Its just the way the car is, it has DBW (drive by wire) so you get that annoying on-off feeling if you aren't really smooth on the throttle.

jlukja

Its hard to feather the throttle due to the Drive By Wire and discrete nature of the throttle position sensor.

davidspalding

Hadn't noticed this too bad. ... Something for me to drive on my afternoon commute.

Look out, RTP, traffic.... (vroom)
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Of course, with a stick, you can always feather the clutch and ease into second. Not too great on the friction plate, though. I know with my old 1982 Accord, and even more so with a 1981 Civic Wagon, a super light and gentle touch was needed on the clutch pedal, and throttle. I stalled out that Civic about a dozen times trying to find the "friction point" (I was driving an MGB at the time, with a friction point you couldn't miss with a wooden leg).

ohmstable

I tried being smooth on the throttle but it doesn't seem to help much. Could it be the throttle position sensor is bad?

I'm pretty sure this is not normal.

78transam

Do a web search on DFCO deceleration fuel cutoff. The engine momentarily dies because the fuel injectors are shut off. The cars momentum keeps the engine spinning. The engine refires when rpm's drop below a specified threshold or the accelerator is pressed. A slight shudder may be the result. It's a gas saving feature. I have been told elsewhere on this list that the TSX implements DFCO.

Tangoman

Yea, thats the thing - it is definitely normal. You can't be as smooth as you need to be in order to have it not jerk, its not your fault though.

The car's electronic throttle doesn't have a fine enough resolution to get the good smooth back-on-throttle response that you want.

All TSX drivers live with it.

sonyfever

Hi there,

The response depends on the rpm. I think it's 2500 rpm, but it could be 2000-2500rpm, I am not sure. Below that you can avoid the jerkiness by being super smooth and gradual on throttle application. Above that it doesn't matter how hard you try, the on/off throttle jerkiness stays. For me, it's most annoying when doing spirited driving because the on/off jerkiness would make me feel uneasy at times when accelerating out of corner.

If you want to be really smooth, wait till the rpm drops lower before you apply the throttle.

davidspalding

I played with this a bit the past week, I think the 5AT definitely covers this up. You 6MT (lucky buggers) probably encounter this more.

Thermos

I actually have an 05AT as well and I've been experiencing the jerkiness as well.

Good to know that it's normal behavior though cause I'd worried every now and then when I'd feel it