Throttle Surge on Upshift
Thread Starter
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Member
Joined: Jan 2009
Posts: 259
From: Tampa, FL
Throttle Surge on Upshift
After driving my 5 speed 2009 Fit Sport for six days I noticed an annoying problem during up shift from a lower gear to the next higher gear. When I lift my foot off the gas throttle then depressed the clutch pedal before up shifting, there is a throttle surge. I could see the tachometer RPM climb up several hundred RPM. It seems as if the throttle body butterfly is stuck momentarily before full closed. There is no RPM surge when I downshift from a higher gear to the next lower gear after braking to slow down the car. I have examined both the throttle body and throttle body cable and they are working properly. The only thing I could attribute this problem to is the Honda drive-by-wire. Has anyone with a 5 speed FIT notice this problem? I have another vehicle that is not made by Honda that has a drive-by-wire system and it doesn’t have the RPM surge problem.
Member
Joined: Nov 2008
Posts: 137
From: Santa Cruz, California
I kinda know what your talking about. Before its completely engaged in gear, it almost seems like more power is being produced, then once I let off the clutch pedal it doesn't happen.
I don't think its only you.
I don't think its only you.
Member
Joined: Oct 2008
Posts: 133
From: Bowser, BC, Canada
It's not "just" the drive-by-wire. It is because of emmisions. When you lift off the throttle to upshift, the sudden throttle closing causes the car to run a bit rich for a fraction of a second. While it may not seem like much, cars these days are extremely low-emissions, and the standards are getting tougher all the time. That is one disadvantage about manual transmissions. Previous Hondas, even without drive-by-wire, had similar problems where the revs would "hang" and not drop immediately after lifting off the throttle when upshifting.
One way to get around this is to lift off the throttle before pushing in the clutch pedal. It takes a while to get used to, especially if you have other manual-transmission cars that don't do this.
One way to get around this is to lift off the throttle before pushing in the clutch pedal. It takes a while to get used to, especially if you have other manual-transmission cars that don't do this.
yep, as posted above, it's for emissions to burn all (most) the fuel before it leaves
your car.
once you get use to it it wont bother you. you'll just naturally learn to roll off
the throttle smoother.
your car.
once you get use to it it wont bother you. you'll just naturally learn to roll off
the throttle smoother.
Member
Joined: Jan 2009
Posts: 71
From: New Jersey
It's not "just" the drive-by-wire. It is because of emmisions. When you lift off the throttle to upshift, the sudden throttle closing causes the car to run a bit rich for a fraction of a second. While it may not seem like much, cars these days are extremely low-emissions, and the standards are getting tougher all the time. That is one disadvantage about manual transmissions. Previous Hondas, even without drive-by-wire, had similar problems where the revs would "hang" and not drop immediately after lifting off the throttle when upshifting.
One way to get around this is to lift off the throttle before pushing in the clutch pedal. It takes a while to get used to, especially if you have other manual-transmission cars that don't do this.
One way to get around this is to lift off the throttle before pushing in the clutch pedal. It takes a while to get used to, especially if you have other manual-transmission cars that don't do this.
Member
Joined: Sep 2008
Posts: 333
From: Mankato, MN
It's not "just" the drive-by-wire. It is because of emmisions. When you lift off the throttle to upshift, the sudden throttle closing causes the car to run a bit rich for a fraction of a second. While it may not seem like much, cars these days are extremely low-emissions, and the standards are getting tougher all the time. That is one disadvantage about manual transmissions. Previous Hondas, even without drive-by-wire, had similar problems where the revs would "hang" and not drop immediately after lifting off the throttle when upshifting.
One way to get around this is to lift off the throttle before pushing in the clutch pedal. It takes a while to get used to, especially if you have other manual-transmission cars that don't do this.
One way to get around this is to lift off the throttle before pushing in the clutch pedal. It takes a while to get used to, especially if you have other manual-transmission cars that don't do this.
This. It works perfectly. It took a while for me to get used to.
Thread Starter
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Member
Joined: Jan 2009
Posts: 259
From: Tampa, FL
It is going to take time to get use to lifting off the throttle and wait a couple of seconds before depressing the clutch. That is going to painful when you are stuck in stop and go traffic. Well I guess that is the price to pay for a greener car.
Member
Joined: Oct 2008
Posts: 133
From: Bowser, BC, Canada
You don't have to wait a couple of seconds. Just lift off the throttle a moment before you start pushing in the clutch. Just try it out and see how long a delay you need in order to get smooth shifts. It's not that bad after a while. And it's not as bad as my previous Honda: 2002 CR-V.
Member
Joined: Sep 2008
Posts: 134
From: Oklahoma
I read about this 'problem' before I went with my wife to pick-up her new MT Fit. She traded in a MT Mazda 3. As a passenger I notice the high rev during changes. I think part of it was a different car. As mentioned the clutch points are different. The Mazda had a heavier clutch. I'm sure she will get used to it. Many of the shifts on the way home didn't seem to have as much of a surge if any so it should be just an adjustment of style.
for those of you that think 'drive by wire' is the problem it really is not because
my other cars (MT) are both drive by wire and do not do this.
it has to do with the ECU map on the Fit's. honda programmed it to burn off
the fuel all the way before the engine spins down to improve emissions.
my other cars (MT) are both drive by wire and do not do this.
it has to do with the ECU map on the Fit's. honda programmed it to burn off
the fuel all the way before the engine spins down to improve emissions.
Member
Joined: Jan 2009
Posts: 52
From: Houston
like everyone is saying really common with any car iwth a drive by wire. The Blitz makes a throttle controller (it does wonders on my g35 no surge and response is night and day). i hope they come out with it for the Fit.
New Member
Joined: Nov 2008
Posts: 15
From: MN
7th gen accords do this also but only with a intake and an exhaust is it noticeable. also the blitz controller can be used on our cars it just needs to be wired correctly. someone is trying to wire it as i type on V6P.net.