GR86 Jerky acceleration when cold?

[BOOSTFAN]

The MX5 will be night and day different. My ND1 is so much "softer" in the throttle, very easy to drive smoothly at any speed. Very linear throttle map, the 86 feels very on/off. I will try the track mode later and see if ti makes any difference.

Had a test drive in a 2.0 ND 184 demo today. Just threw me the keys & said enjoy which I did.
Lovely little thing & boy does that engine love to rev, maybe not quiet as quick as the 86 but so much smoother.
Really looking forward to Sundays test drive in the BBR 220 ND.

 

[RedGR86]

Had a test drive in a 2.0 ND 184 demo today. Just threw me the keys & said enjoy which I did.
Lovely little thing & boy does that engine love to rev, maybe not quiet as quick as the 86 but so much smoother.
Really looking forward to Sundays test drive in the BBR 220 ND.

You will struggle to walk away from the BBR.

 

[jb1750]

Sorry to hear that people are struggling with this. Adding some balance into the conversation I daily mine, and not having this issue at all. It’s got to be worth getting them checked out by your local dealer before giving up on them, maybe something needs fixing on them?

Likewise I’ve been daily driving mine for a couple of months (just over 2k miles) and I haven’t noticed any jerkiness even when cold. Are folk saying the car kangaroos on a light throttle? If so I’d say it’s definitely worth looking into that further as they’re deffo not all like that
If you’re experiencing those symptoms and there’s any other zoo members nearby or dealer demos, it might be useful to drive another car to see how another one drives?

 

[v8s]

Likewise I’ve been daily driving mine for a couple of months (just over 2k miles) and I haven’t noticed any jerkiness even when cold. Are folk saying the car kangaroos on a light throttle? If so I’d say it’s definitely worth looking into that further as they’re deffo not all like that
If you’re experiencing those symptoms and there’s any other zoo members nearby or dealer demos, it might be useful to drive another car to see how another one drives?

I tried track mode yesterday (briefly) and din't notice any discernible difference, I might ask the dealer for another drive of their demo car.

 

[Silver Fox]

Had a test drive in a 2.0 ND 184 demo today. Just threw me the keys & said enjoy which I did.
Lovely little thing & boy does that engine love to rev, maybe not quiet as quick as the 86 but so much smoother.
Really looking forward to Sundays test drive in the BBR 220 ND.

I'd be interested to hear about your BBR drive; I was seriously considering some sort of BBR NC or ND before the GR was announced.

 

[Silver Fox]

With regard to the jerky acceleration issue, it does sound like a problem affecting some cars and not others, which is mysterious.

I definitely don't have the problem on my own car and I don't remember it being an issue on my demo car test drive either.

Are the problem cars generally the ones with low mileage/not run in?

Anyone having issues with a car with, say, over 2k miles?

('My' demo car had about 100 miles on it when I drove it and like I say I don't remember a problem)

 

[KobayashiMaru86]

Unless it's an emissions fuelling thing like on lots of new vehicles. Lots of manufacturers try and get them to run lean as they can get away with to get past the tests. Mine from cold will do it if I'm over eager with the throttle but so does my Street Triple. Had a Speed Twin 1200 as a demo bike this week and that was the same too but give it 5mins for the plugs to warm and it's fine.

 

[Conscript]

I get it occasionally. To me what seems to trigger it is if I am on a light throttle, and then I try to give it a little more throttle, but don't go very deep into the pedal, the car feels like it jerks a little. Almost like it's anticipating me wanting more power then realising I haven't pushed the pedal as far as that, so it retards a little. If I push the throttle just a tad harder, it doesn't do it - but of course, around town when you're modulating the throttle lightly, this isn't always possible. It's kind of hard to explain. To me it's a little irritating sometimes when I feel it, but it doesn't ruin the car for me.

For reference - think I'm on about 3200 miles now, running on Tesco 99 almost exclusively.

 

[Beans]

I get it occasionally. To me what seems to trigger it is if I am on a light throttle, and then I try to give it a little more throttle, but don't go very deep into the pedal, the car feels like it jerks a little. Almost like it's anticipating me wanting more power then realising I haven't pushed the pedal as far as that, so it retards a little. If I push the throttle just a tad harder, it doesn't do it - but of course, around town when you're modulating the throttle lightly, this isn't always possible. It's kind of hard to explain. To me it's a little irritating sometimes when I feel it, but it doesn't ruin the car for me.

For reference - think I'm on about 3200 miles now, running on Tesco 99 almost exclusively.

I have exactly this, it's hard to describe but I definitely get the feeling when the car jolts forward then backs off very slightly if I don't accelerate enough. Hasnt ruined the driving experience for me but something to keep in mind from a cold start

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[FRAJ]

I have exactly this, it's hard to describe but I definitely get the feeling when the car jolts forward then backs off very slightly if I don't accelerate enough. Hasnt ruined the driving experience for me but something to keep in mind from a cold start

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Same here. Whenever I try to replicate it though it works fine, so it's not even consistent on one car. I assume due to the specific conditions at that time and what the ECU is doing. I even tried connecting the OBD thing and looking at pedal position vs throttle, but unless the engine is running the throttle behaves in a strange way so I'd need to log it on a run.
Still a relatively minor issue though.

 

[Orro]

I get it occasionally. To me what seems to trigger it is if I am on a light throttle, and then I try to give it a little more throttle, but don't go very deep into the pedal, the car feels like it jerks a little. Almost like it's anticipating me wanting more power then realising I haven't pushed the pedal as far as that, so it retards a little. If I push the throttle just a tad harder, it doesn't do it - but of course, around town when you're modulating the throttle lightly, this isn't always possible. It's kind of hard to explain. To me it's a little irritating sometimes when I feel it, but it doesn't ruin the car for me.

For reference - think I'm on about 3200 miles now, running on Tesco 99 almost exclusively.

This closest describes the behaviour I get every so often.

 

[v8s]

I get it occasionally. To me what seems to trigger it is if I am on a light throttle, and then I try to give it a little more throttle, but don't go very deep into the pedal, the car feels like it jerks a little. Almost like it's anticipating me wanting more power then realising I haven't pushed the pedal as far as that, so it retards a little. If I push the throttle just a tad harder, it doesn't do it - but of course, around town when you're modulating the throttle lightly, this isn't always possible. It's kind of hard to explain. To me it's a little irritating sometimes when I feel it, but it doesn't ruin the car for me.

For reference - think I'm on about 3200 miles now, running on Tesco 99 almost exclusively.

That pretty much mirrors what I would have written even down to the petrol used but my mileage is just coming up to 1000.

 

[RedGR86]

I get it occasionally. To me what seems to trigger it is if I am on a light throttle, and then I try to give it a little more throttle, but don't go very deep into the pedal, the car feels like it jerks a little. Almost like it's anticipating me wanting more power then realising I haven't pushed the pedal as far as that, so it retards a little. If I push the throttle just a tad harder, it doesn't do it - but of course, around town when you're modulating the throttle lightly, this isn't always possible. It's kind of hard to explain. To me it's a little irritating sometimes when I feel it, but it doesn't ruin the car for me.

For reference - think I'm on about 3200 miles now, running on Tesco 99 almost exclusively.

This is a very good description of it

 

[SJR202]

Likewise I’ve been daily driving mine for a couple of months (just over 2k miles) and I haven’t noticed any jerkiness even when cold. Are folk saying the car kangaroos on a light throttle? If so I’d say it’s definitely worth looking into that further as they’re deffo not all like that
If you’re experiencing those symptoms and there’s any other zoo members nearby or dealer demos, it might be useful to drive another car to see how another one drives?

That is pretty much what mine does, first 1" of travel is jerky, exasperated when engine is cold and more so in cold temps (picked mine up in Jan and when temp was sub 5C it was like a clown car driven by a drunk kangaroo!)
Workaround is riding the clutch a bit longer/more on stationary starts (not ideal) or pushing the accelerator much further to 'bypass' the first inch of travel then changing gear before the speed/revs really build.
Am a bit baffled, I also dont remember anything of it on the demo car which was a cold day in Dec, in fact driving it sealed my purchase and couldnt wait, if mine had been the demo I might not have bothered.

Mileage 2500, vpower/99 fuel only

 

[BOOSTFAN]

I'd be interested to hear about your BBR drive; I was seriously considering some sort of BBR NC or ND before the GR was announced.

You have probably read elsewhere on here I swapped my 86 for the BBR220 ND 30AE on Sunday.
Very very happy with my decision, its an absolute blast to drive, loves to rev & so smooth.
Sounds lovely with the catted 4 Branch Header & BBR exhaust.
Its also lowered, has floating front brakes & is running on Toyo R888R rubber.
Full PPF front end & Ceramic coated.

 

[Silver Fox]

You have probably read elsewhere on here I swapped my 86 for the BBR220 ND 30AE on Sunday.
Very very happy with my decision, its an absolute blast to drive, loves to rev & so smooth.
Sounds lovely with the catted 4 Branch Header & BBR exhaust.
Its also lowered, has floating front brakes & is running on Toyo R888R rubber.
Full PPF front end & Ceramic coated.

Fantastic spec - yes I did see the new car on the other thread. Great choice and I hope you have many enjoyable miles in it.

 

[jb1750]

You have probably read elsewhere on here I swapped my 86 for the BBR220 ND 30AE on Sunday.
Very very happy with my decision, its an absolute blast to drive, loves to rev & so smooth.
Sounds lovely with the catted 4 Branch Header & BBR exhaust.
Its also lowered, has floating front brakes & is running on Toyo R888R rubber.
Full PPF front end & Ceramic coated.

BBR sounds like a lot of fun - enjoy
(Just wish I could put one in the photocopier at 120%…)

 

[v8s]

You have probably read elsewhere on here I swapped my 86 for the BBR220 ND 30AE on Sunday.
Very very happy with my decision, its an absolute blast to drive, loves to rev & so smooth.
Sounds lovely with the catted 4 Branch Header & BBR exhaust.
Its also lowered, has floating front brakes & is running on Toyo R888R rubber.
Full PPF front end & Ceramic coated.

Saw it on Autotrader (admittedly after you said you had bought it) and it looks to have a very nice spec, would have been tempted by that myself if I didn't already have an MX5 and 86 (and if it had been soul red)

 

[Conscript]

This might have already been mentioned, but I think footwear makes a bit difference to this as well. I go to the gym most mornings if I can - it's only a couple of miles, and through town/residential roads and I've been noticing the jerkiness more, and putting it down to the car being cold. But I'm usually wearing running trainers, with quite a thick, padded sole.

This morning, I wore my more casual trainers (Puma Speedcats, the one's I find most comfortable for driving as it happens), and didn't really have any issues. Found it much smoother to drive, so I think a lot of it is certainly down to being able to feel what you're doing.

 

[Beans]

This might have already been mentioned, but I think footwear makes a bit difference to this as well. I go to the gym most mornings if I can - it's only a couple of miles, and through town/residential roads and I've been noticing the jerkiness more, and putting it down to the car being cold. But I'm usually wearing running trainers, with quite a thick, padded sole.

This morning, I wore my more casual trainers (Puma Speedcats, the one's I find most comfortable for driving as it happens), and didn't really have any issues. Found it much smoother to drive, so I think a lot of it is certainly down to being able to feel what you're doing.

I concur. Thin soled shoes are the best way to drive this car, or socks? [emoji102]. I struggle with boots/thick soled trainers too as you can't feel naff-all!


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