Jerky throttle in traffic in 2nd gear

phutons · Oct 26, 2019

I'm on stock right now, waiting until warranty is over to tune. But I've definitely been switching BTW neutral and 1st or 2nd for the same reason.

WhiteSi · Oct 26, 2019

Man, I thought I was CRAZY, or the car was breaking and fixing its self magically.
Thanks for this thread!

My other guess was that I was in a cycle of being thrown forwards an then back in my seat, affecting my throttle inputs.

phutons · Oct 26, 2019

WhiteSi said:
Man, I thought I was CRAZY, or the car was breaking and fixing its self magically.
Thanks for this thread!

My other guess was that I was in a cycle of being thrown forwards an then back in my seat, affecting my throttle inputs.

Yeah no problem! I was definitely afraid my new car had some issues already, but I guess it's fairly common for the si. Hopefully a new engine mount will help in the future..

cafecito820 · Oct 28, 2019

Yep, same thing happens to me. I intentionally avoid roads that I know will be bumper-to-bumper stop-and-go because of how annoying it is to drive in.

But, when I have no choice, I tend to just leave it in 2nd gear, and use both the clutch and throttle gently to creep forward. It's a lot of effort, and definitely falls into the category of things that gearheads would tell you not to do, but I can't stand the jerkiness either, so... meh

phutons · Oct 28, 2019

cafecito820 said:
Yep, same thing happens to me. I intentionally avoid roads that I know will be bumper-to-bumper stop-and-go because of how annoying it is to drive in.

But, when I have no choice, I tend to just leave it in 2nd gear, and use both the clutch and throttle gently to creep forward. It's a lot of effort, and definitely falls into the category of things that gearheads would tell you not to do, but I can't stand the jerkiness either, so... meh

Yeah I live in Los Angeles, so there's not many roads I can use to avoid traffic. I still love the car, but I guess the jerkiness is just something we all have to live with.

tacthecat · Oct 28, 2019

Our '12 Si has done it since day 1. With the 2.4 it's best to let engine idle and use clutch to move along in 1st or second. Use throttle as little as possible, leave a gap and try and avoid the "accordion effect"

cafecito820 · Oct 28, 2019

tacthecat said:
Use throttle as little as possible, leave a gap and try and avoid the "accordion effect"

Not to get too off topic, but a lot of drivers seem to interpret you leaving a safe following distance as an invitation to ram the front of their car into your lane to make you brake. Or, at least, Florida drivers do anyway...

tacthecat · Oct 28, 2019

cafecito820 said:
Not to get too off topic, but a lot of drivers seem to interpret you leaving a safe following distance as an invitation to ram the front of their car into your lane to make you brake. Or, at least, Florida drivers do anyway...

It's the same everywhere - just have to learn patience and arrive 1 car further back but relaxed.

JJTHESIPLANE · Oct 28, 2019

The Type R rear motor mount has reduced the jerkiness slightly. You'd just have to live with the extra vibrations through the cabin. It's not that bad, but it does vibrate a little more at idle since I have installed it, and it's been on my car for at least 10k miles.

TypeSiR · Oct 28, 2019

cafecito820 said:
Not to get too off topic, but a lot of drivers seem to interpret you leaving a safe following distance as an invitation to ram the front of their car into your lane to make you brake. Or, at least, Florida drivers do anyway...

It’s a lot more civil over here even with the occasional cut in. You’ll never get home in some other country if you aren’t keeping a 2-in distance behind the car in front of you.

MattyNice · Oct 28, 2019

It’s the drive by wire throttle as it is an on off switch. Just treat the pedal like a baby chic, not an egg cause that’s too strong, and use first, not second, and you’ll get the hang of it. It’s easier in first to just slightly have the throttle pressed than it is in second where you have to be on and off in stop n go. With a/c on you have to be even more masterful. I always treated it like a game to see how smooth I could be- same as shifting.

phutons · Oct 28, 2019

JJTHESIPLANE said:
The Type R rear motor mount has reduced the jerkiness slightly. You'd just have to live with the extra vibrations through the cabin. It's not that bad, but it does vibrate a little more at idle since I have installed it, and it's been on my car for at least 10k miles.

Did your NVH noticeably decrease after the 10k miles? Which motor mount did you end up purchasing?

MattyNice said:
It’s the drive by wire throttle as it is an on off switch. Just treat the pedal like a baby chic, not an egg cause that’s too strong, and use first, not second, and you’ll get the hang of it. It’s easier in first to just slightly have the throttle pressed than it is in second where you have to be on and off in stop n go. With a/c on you have to be even more masterful. I always treated it like a game to see how smooth I could be- same as shifting.

Hmm I'll have to try that out. I know that it's gonna be a helluva lot more jerky in 1st if I take my foot off the throttle due to engine braking. Thanks for the tips!

JJTHESIPLANE · Oct 29, 2019

phutons said:
Did your NVH noticeably decrease after the 10k miles? Which motor mount did you end up purchasing?

I still currently have the Type R installed. Some of the vibrations have cancelled out and is a lot more enjoyable now than it was when I first installed it. I wish it was a little bit stiffer as to me it is almost perfect. NVH seems normal when I'm moving, and I haven't developed any rattles or anything like that despite how bad the roads are where I live. When in idle the car just vibrates a little more but I'm pretty numb to it now.

Jerky throttle in traffic in 2nd gear

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