Jerky at low RPMS

Gaiiden · 08-13-2009, 04:26 AM

Quote:

Originally Posted by FricFrac

I've found a fix to the jerkyness problem. While in 1st rev the engine to 4K + with the clutch in. Keep your foot on the throttle and dump the clutch while depressing the throttle. The rev limiter will kick in at 7500 RPM. That will be your signal to engage the clutch again and shift into second. Dump the clutch again while maintaining the throttle and you'll be off without any jerking..... If this is to agressive for you the alternative is to get the automatic. Problem solved!

You do know how much a clutch costs right? Why would you tell people to dump a clutch all the time when driving normally? Unless my understanding of clutch dumping is wrong, that will tear it up a lot faster. A

might have been nice at the end of this to stop people who don't know from following your "advice"

I'll agree with everyone saying to ease out at 1500rpm into first and go slow into second. It just takes some getting used to, although I still get caught sometimes and jerk around a bit. Sometimes I just wind out 1st gear up to 5k to make shifting to 2nd easier. Plus it sounds awesome :P

FricFrac · 08-13-2009, 10:04 AM

Quote:

Originally Posted by Gaiiden

You do know how much a clutch costs right? Why would you tell people to dump a clutch all the time when driving normally? Unless my understanding of clutch dumping is wrong, that will tear it up a lot faster. A

might have been nice at the end of this to stop people who don't know from following your "advice"

I'll agree with everyone saying to ease out at 1500rpm into first and go slow into second. It just takes some getting used to, although I still get caught sometimes and jerk around a bit. Sometimes I just wind out 1st gear up to 5k to make shifting to 2nd easier. Plus it sounds awesome :P

Seriously if you don't realize that reving your car to red line and dumping the clutch isn't tounge in cheek as a solution for a jerky start then you shouldn't be driving a car! No smilie need on that one.... Can you imagine someone taking that advice seriously? Come on..... Every light doing a massive burn out?

No offense to any of the posters but its pretty basic driving here to get the car to pull away without jerking. Its not the car - its the driver not adjusting to a new vehicle. Once you spend a little time with the car you'll figure out how to use the clutch and shift properly.

m4a1mustang · 08-13-2009, 10:07 AM

Quote:

Originally Posted by FricFrac

Seriously if you don't realize that reving your car to red line and dumping the clutch isn't tounge in cheek as a solution for a jerky start then you shouldn't be driving a car! No smilie need on that one.... Can you imagine someone taking that advice seriously? Come on..... Every light doing a massive burn out?

No offense to any of the posters but its pretty basic driving here to get the car to pull away without jerking. Its not the car - its the driver not adjusting to a new vehicle. Once you spend a little time with the car you'll figure out how to use the clutch and shift properly.

DIGItonium · 08-13-2009, 03:49 PM

Quote:

Originally Posted by FricFrac

No offense to any of the posters but its pretty basic driving here to get the car to pull away without jerking. Its not the car - its the driver not adjusting to a new vehicle. Once you spend a little time with the car you'll figure out how to use the clutch and shift properly.

It took me awhile to adjust from the 350Z, and I had lots of issues because of clutch pedal "play" (funky engagement point) and clunky shifter.

khtso · 08-13-2009, 05:53 PM

Quote:

Originally Posted by DIGItonium

It took me awhile to adjust from the 350Z, and I had lots of issues because of clutch pedal "play" (funky engagement point) and clunky shifter.

I don't see it so much as that for me. Even after I've fully engaged the clutch, and I'm in first gear accelerating, say from 2500rpm up, if I do it slowly and smoothly, the car jerks/bucks slightly once or twice (not really a large buck, but it hesitates and the RPM fluctuates slightly). It's weird. It almost seems as if the electronic throttle is modulating up and down a few times.

mattjk · 08-13-2009, 02:21 AM

Same here. I can't seem to take off smoothly. It is like it is a combination of the clutch engagement being to long and soft motor mounts making the engine rock side to side.

armensti · 08-13-2009, 02:34 AM

you just need to get use to the car and you gotta play with the clutch and the gas a little bit to really understand whats going on. what i do sometimes is hold the clutch and then take off slowly and as soon as the car starts rolling i let go of the gas and i push the clutch a little bit so i just keep on doing that until i get use to the sweet spot.

the jerkiness goes away if you rev it around 1300-1500 k before releasing the clutch.

DIGItonium · 08-13-2009, 08:09 AM

Again, from my experience, it's not about the RPMs. If you drive slow, you'll have to shift and engage slower. Make sure your clutch pedal is down or close to the floor before shifting. If you get in the habit of shifting while clutch pedal is being pressed, you'll more likely to hear the clunk and feel resistance. To help with the smoothness, press the clutch pedal down to the floor quickly before shifting and ease out of it once you get in 2nd. You shifts will be much more lighter and smooth regardless of RPM.

For daily driving, I find myself hovering under 3k RPM all the time. It gets herky jerky once in awhile. Just watch your footwork with the clutch pedal regardless of how much gas you give it. What I also found that improves smoothness with upshifts is to pivot my foot higher off the floor when pressing down the clutch pedal. When downshifting and starting in first gear, you can press clutch pedal anyway you like it (which I pivot my foot closer or on the floor).

mspeasl · 08-13-2009, 06:21 PM

Quote:

Originally Posted by khtso

I've noticed this from when I first got the car, but now finally decided to ask you guys about it. At low RPMs, like in first gear leaving a stop light, the car feels jerky. I watch the RPMs, and they don't go up smoothly but the car kinda bucks slightly. It happens every time. Seems to only be an issue in 1st and maybe 2nd gear, when accelerating slowly. Does anyone else have this problem, or is it just my car?

I have been driving a stick shift non stop since 1959. I currently have an X-Runner 6sp and I traded a 350 6sp for a new 370 6sp. I have had injected small block Chevrolet drag cars with stick shifts as well as Big blocks. I must say that the 370 has the touchiest Clutch that I have ever driven!! But, this "Appears to be Common" for the car. I thought at first it was me and old age (67) and time to give up the manuals. Then I went back to my dealer and told them I wanted to drive a "Z" on their lot. I took it out and guess what? It reacted the same way as mine. There was another thread on here that some have readjusted their pedal travel and have helped the problem. But so far I have not found the time to try it myself.

Red370 · 08-13-2009, 06:35 PM

Quote:

Originally Posted by mspeasl

I have been driving a stick shift non stop since 1959. I currently have an X-Runner 6sp and I traded a 350 6sp for a new 370 6sp. I have had injected small block Chevrolet drag cars with stick shifts as well as Big blocks. I must say that the 370 has the touchiest Clutch that I have ever driven!! But, this "Appears to be Common" for the car. I thought at first it was me and old age (67) and time to give up the manuals. Then I went back to my dealer and told them I wanted to drive a "Z" on their lot. I took it out and guess what? It reacted the same way as mine. There was another thread on here that some have readjusted their pedal travel and have helped the problem. But so far I have not found the time to try it myself.

67 and driving a Z, you sir, are my hero.

ZForce · 08-14-2009, 12:54 AM

Great thread guys, a lot good info. I thought the car was starving for gas until I found this thread.

jayhuffdaddy · 03-15-2011, 08:30 PM

I have a 7AT and I noticed that my car is jerking when I'm slowing down. Anyone know what this could be? Seems to jerk when the car is pulling up to a stop sign or red light. Sometimes jerks when I leave a light or stop sign as well.

AlphaSnacks · 03-15-2011, 08:40 PM

Quote:

Originally Posted by jayhuffdaddy

I have a 7AT and I noticed that my car is jerking when I'm slowing down. Anyone know what this could be? Seems to jerk when the car is pulling up to a stop sign or red light. Sometimes jerks when I leave a light or stop sign as well.

Wtf...that's called an automatic shifting up and down. Is this your first car?

+1 shado

jayhuffdaddy · 03-16-2011, 09:30 AM

I know what an automatic is. It feels like it is jerking more than usual. If you don't have anything good to contribute don't post anything at all.

Quote:

Originally Posted by Arnold K.

Wtf...that's called an automatic shifting up and down. Is this your first car?

+1 shado

shadoquad · 03-15-2011, 08:32 PM

08-13-2009, 08:09 AM	#8 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 43	Again, from my experience, it's not about the RPMs. If you drive slow, you'll have to shift and engage slower. Make sure your clutch pedal is down or close to the floor before shifting. If you get in the habit of shifting while clutch pedal is being pressed, you'll more likely to hear the clunk and feel resistance. To help with the smoothness, press the clutch pedal down to the floor quickly before shifting and ease out of it once you get in 2nd. You shifts will be much more lighter and smooth regardless of RPM. For daily driving, I find myself hovering under 3k RPM all the time. It gets herky jerky once in awhile. Just watch your footwork with the clutch pedal regardless of how much gas you give it. What I also found that improves smoothness with upshifts is to pivot my foot higher off the floor when pressing down the clutch pedal. When downshifting and starting in first gear, you can press clutch pedal anyway you like it (which I pivot my foot closer or on the floor). __________________

03-15-2011, 08:30 PM	#12 (permalink)
jayhuffdaddy Base Member Join Date: Jul 2009 Location: Southeast Posts: 200 Drives: P/G 2010 370Z Rep Power: 17	I have a 7AT and I noticed that my car is jerking when I'm slowing down. Anyone know what this could be? Seems to jerk when the car is pulling up to a stop sign or red light. Sometimes jerks when I leave a light or stop sign as well. __________________ Get your free dropbox account here http://db.tt/m4cYBiU When you sign up you and I get an extra 500MB of storage. Rimbit, the new Bitcoin alternative http://igg.me/at/rimbit-com/x/7599377

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08-13-2009, 02:21 AM	#6 (permalink)
mattjk Enthusiast Member Join Date: Jul 2009 Location: Azusa Posts: 331 Drives: 09 370z K51 09 Elise Rep Power: 268	Same here. I can't seem to take off smoothly. It is like it is a combination of the clutch engagement being to long and soft motor mounts making the engine rock side to side.

08-13-2009, 02:34 AM	#7 (permalink)
armensti Enthusiast Member Join Date: Mar 2009 Location: CA Posts: 447 Drives: 370Z/Tring/Spt/6MT Rep Power: 17	you just need to get use to the car and you gotta play with the clutch and the gas a little bit to really understand whats going on. what i do sometimes is hold the clutch and then take off slowly and as soon as the car starts rolling i let go of the gas and i push the clutch a little bit so i just keep on doing that until i get use to the sweet spot. the jerkiness goes away if you rev it around 1300-1500 k before releasing the clutch.

08-14-2009, 12:54 AM	#11 (permalink)
ZForce A True Z Fanatic Join Date: Jul 2009 Location: Roseville, CA Posts: 2,359 Drives: 09 370Z Tour + Sport Rep Power: 22	Great thread guys, a lot good info. I thought the car was starving for gas until I found this thread.

03-15-2011, 08:32 PM	#15 (permalink)
shadoquad A True Z Fanatic Join Date: Apr 2010 Location: . Posts: 42,608 Drives: . Rep Power: 3887