Anyone have a slight stumble when they casually accelerate from 1st into 2nd gear? Upon the 1-2 shift, when you get on the gas after going into 2nd, the car slightly stumbles and then proceeds to accelerate again.

Just wondering if anyone else has this happen or if it is a weird combination of my mods.

 

I get that sometimes on my stock Si. I only seem to get it if I shift into second around 2.5-3.5k rpms though. If I shift higher than that, I have no problems at all.

 

yep, same here..... even on the K24

while viewing the timing maps, seems as if the ECU severely retards the timing for reasons unknown to me.


same goes for the backfires we also have.


?????? go figure

 

does it do this only when cold? or all the time, maybe u cant drive stick

 

I'm surprised... I get that on my EX. I either shift higher or disengage the clutch softer entering 2nd gear.

Thought it was cuz of lack of torque.

 

ya our eCU's do TOO much of the sneaky work

 

i get the same thing also

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by autojive &raquo;</TD></TR><TR><TD CLASS="quote">I get that sometimes on my stock Si. I only seem to get it if I shift into second around 2.5-3.5k rpms though. If I shift higher than that, I have no problems at all.</TD></TR></TABLE>

Yeah me too. No clue why it does it.

 

Yeah, it feels like a slight hesitation and then it's fine. I don't get it either. Thought about taking it in to have it checked, but I'm over 36,xxx now. Maybe it has something to do with a kink in the i-VTEC. Doesn't VTEC kick in around 2,200 on the SI, though? I've always been above that when second gear engages.

 

Happens to me too. I either shift higher or let go of the clutch slower/smoother.

 

ya it happens to me too in my type s but it only does it sometimes alot wen i shift at lower revs if i shift at like 4k im good to go

 

Yup I have it too. I just thought it was my fault because I've only been driving stick for 4.5 months. If you let out the clutch just right, it isn't an issue.

 

So, the question is: Is this a clutch issue, engine issue, or transmission issue?

Maybe it is not a defect per say, but a hole in the power band. I remember hearing something about Honda having problems with tuning the K20.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Web_Head &raquo;</TD></TR><TR><TD CLASS="quote">So, the question is: Is this a clutch issue, engine issue, or transmission issue?

Maybe it is not a defect per say, but a hole in the power band. I remember hearing something about Honda having problems with tuning the K20.</TD></TR></TABLE>

Good question. Even the Hondata flash didn't get rid of the problem on my car. However, my guess would be a ecu/timing issue like Jack suggested.

 

i always stumble ..

 

I was reading up on the new Acura TSX today in a mag (forgot the name but will check it out tomorrow) and I remember running into a small Civic Si comparison about how well the two cars shift gears. It mentioned that the new Si compared to the older one doesn't drop RPMs as fast as it used to. (Flywheel perhaps?) Then it went on about how different and better the shifter cables (I think) are in the TSX compared to the Si.

When I find that mag I'll find the article hopefully on the internet if you think that could be the issue.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Todd00 &raquo;</TD></TR><TR><TD CLASS="quote">Anyone have a slight stumble when they casually accelerate from 1st into 2nd gear? Upon the 1-2 shift, when you get on the gas after going into 2nd, the car slightly stumbles and then proceeds to accelerate again.

Just wondering if anyone else has this happen or if it is a weird combination of my mods.</TD></TR></TABLE>

Question: so at about what speed this "stumbles" occured? precisely, right when you are engaged in 2nd gear, what is the read on the speedometer?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vpforeva &raquo;</TD></TR><TR><TD CLASS="quote">does it do this only when cold? or all the time, maybe u cant drive stick </TD></TR></TABLE>

i get the stumble in the morning. but in the afternoon when i leave work, the car drives smooth as silk

 

I thought someone said the K-series motors are rev-limited to 5500rpm in neutral or something like that? Is it possible that that feature is somehow getting triggered on the 1-2 shift?

 

K20A3 is 6500 if speed sensor is less the ~3mph 6800 if higher than

 

As per Sports Car Magazine, the Si lacks in fast upshifting because it has a drive-by-wire system in the shift linkage. This help your EP3 reach LEV-II emission status. This is non-existent in the new TSX.

Hope this helps. I'm trying to see if the article is on the Internet. If you want to read what it says, it's in this month's issue of Sports Car Magazine - has a red Porsche 911 on the cover.

 

it only happens to me when i drive with the air conditioner on.

 

instead of focusing on the car, I guess I am wondering if that has anything to do with the speed of the car as well. If the rpm drop to less than 2K when engaged in 2nd gear, it could be stumbles because the lack of torque in move the relative "static" weight to accelerate. Just like the same as if you want to start moving the car from a stop in 2nd gear.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CS &raquo;</TD></TR><TR><TD CLASS="quote">instead of focusing on the car, I guess I am wondering if that has anything to do with the speed of the car as well. If the rpm drop to less than 2K when engaged in 2nd gear, it could be stumbles because the lack of torque in move the relative "static" weight to accelerate. Just like the same as if you want to start moving the car from a stop in 2nd gear.

</TD></TR></TABLE>

No, because it happens above 3 and 4k. I almost never shift below 4 grand.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Web_Head &raquo;</TD></TR><TR><TD CLASS="quote">

No, because it happens above 3 and 4k. I almost never shift below 4 grand. </TD></TR></TABLE>

stumbles occured above 3K and 4K? is that the case for everyone else? hum..... anyone knows if this has been addressed in clubrsx.com?