GR86 Jerky acceleration when cold?

[jb1750]

Well I purchased the Pedal Commander and I’m very happy with it, I have it set to City minus 4 and it’s perfect, the Sport plus mode make the throttle crazily sensitive, perhaps useful in a track day, it’s £199 for those in the U.K. I had to remove the 2 x 10mm nuts holding the pedal assembly in place in order to get the loom connector undone, it’s easy to do with the better access, click in the pedal commander, cable tie the excess cable to the under side of the dash, fitted the unit to the dash just under the drivers air pod, looking good, comes with Velcro patches and a cradle, the cradle is bulky so I didn’t use it as the Velcro works perfectly, it’s blue toothed if you want but I liked to have it in a place where I could change settings by the touch of the 3 buttons on the unit face, really simple, I can now drive smoothly without effort, my brother drove the GR86 for the 1st time and managed to drive her smoothly right off the bat, something I really struggled with until I used the Pedal Commander, they are specific for our car, just go to the website and put in our car details, came from Germany with free delivery, no extra taxes, just £199. I was about to buy a spring for the clutch but realised it’s more of a throttle issue, seems I’m right.

Sounds good @johnybigarms ! It wasn’t clear from any of the reviews whether it is the case that ‘zero’ is the baseline/ existing map and the ‘minus’ numbers relate to a reduction in throttle sensitivity?? Or if all the numbers relate to an increase in sensitivity and they’ve just got a daft way of saying it. (After all, are there really that many folk looking to desensitise their factory throttle map??) It sounds like you’re saying the minus numbers do indeed make it less sensitive, in which case, cool, and thanks for being the guinea pig and testing it out

 

[OldManMarkoos]

Sounds good @johnybigarms ! It wasn’t clear from any of the reviews whether it is the case that ‘zero’ is the baseline/ existing map and the ‘minus’ numbers relate to a reduction in throttle sensitivity?? Or if all the numbers relate to an increase in sensitivity and they’ve just got a daft way of saying it. (After all, are there really that many folk looking to desensitise their factory throttle map??) It sounds like you’re saying the minus numbers do indeed make it less sensitive, in which case, cool, and thanks for being the guinea pig and testing it out

If you go to the "See it in action" on the Product Information page you can play with the settings and it gives you an indication of what it's doing.
Strangely, the only mode that seems to detune the throttle is eco mode, but that also seems to limit the max travel.
So City mode (-4) appears to slightly increase the throttle sensitivity, not reduce it,

It may be that this indicative graph is not accurate for all cars as they appear to be car specific.

 

[BOOSTFAN]

Pedal Commander just ordered.

 

[Salko_GR]

Yesterday I have performed accelerator pedal calibration as per @SJR202 instructions in this tread. After day of driving and this morning from cold, car is a lot smoother in 1st and 2nd. No more bunny hopping for me.
The accelerator calibration is still quite aggressive, I have noticed in stop go traffic, one can drive it like a diesel car. Just modulate clutch without any accelerator input, and car moves forward.

 

[Stardus.]

Very tempted to get a Pedal commander for the 86, the tip in is very slow especially when just driving normally. Does it also improve the response, not just the sesnsitivity?

 

[Silver Fox]

the tip in...very slow

Works for me, generally

 

[ZN8]

Very tempted to get a Pedal commander for the 86, the tip in is very slow especially when just driving normally. Does it also improve the response, not just the sesnsitivity?

Response remains the same but you can change the sensitivity.

 

[RedGR86]

Has anybody noticed a difference if they use 97+ RON fuel? In my first two tanks I've used 95 and only just noticed that it needs 98. I wonder if that helps the situation at all...

 

[Triggaaar]

Has anybody noticed a difference if they use 97+ RON fuel? In my first two tanks I've used 95 and only just noticed that it needs 98. I wonder if that helps the situation at all...

I wouldn't think so? If you're using 95 I assume the ecu will adjust the fuel input so that it doesn't pre-detonate, but that wouldn't affect it at low speeds when the engine is cold.

 

[RedGR86]

Just back from a late night drive home and I'm really struggling to live with the throttle on this car. For urban and rural driving, unless your quite a long way into the throttle travel there is a strong likelihood of the stuttering coming back.

It's not just when it's cold, it's there all the time under a light throttle. I've tried the pedal calibration trick, but it didn't really resolve the issue. When I got home and parked up, I found myself wishing I'd taken the other car.

Not what I want to feel about this car.

Does the throttle commander allow the car to be driven smoothly on a light throttle? At the moment I don't see my sticking with the car much longer if this is how it's going to be.

 

[Silver Fox]

Just back from a late night drive home and I'm really struggling to live with the throttle on this car. For urban and rural driving, unless your quite a long way into the throttle travel there is a strong likelihood of the stuttering coming back.

It's not just when it's cold, it's there all the time under a light throttle. I've tried the pedal calibration trick, but it didn't really resolve the issue. When I got home and parked up, I found myself wishing I'd taken the other car.

Not what I want to feel about this car.

Does the throttle commander allow the car to be driven smoothly on a light throttle? At the moment I don't see my sticking with the car much longer if this is how it's going to be.

I do wonder if individual cars have different setups because I haven't had this issue at all.

It can only be a difference in either cars or owners - if the former, could it be mileage (I'm approaching 2k) or fuel (I use V Power)? If the latter, am I more acclimatised to the issue and have adapted to it because I had a GT86 before?

Sorry to hear that you are not getting on with the car.

 

[BOOSTFAN]

Just back from a late night drive home and I'm really struggling to live with the throttle on this car. For urban and rural driving, unless your quite a long way into the throttle travel there is a strong likelihood of the stuttering coming back.

It's not just when it's cold, it's there all the time under a light throttle. I've tried the pedal calibration trick, but it didn't really resolve the issue. When I got home and parked up, I found myself wishing I'd taken the other car.

Not what I want to feel about this car.

Does the throttle commander allow the car to be driven smoothly on a light throttle? At the moment I don't see my sticking with the car much longer if this is how it's going to be.

I feel the same, I have the throttle commander & feel it helps a little, but certainly not night & day.
Test driving a couple ND MX5s over the weekend !

 

[RedGR86]

I feel the same, I have the throttle commander & feel it helps a little, but certainly not night & day.
Test driving a couple ND MX5s over the weekend !

That's interesting, the reviews seem to be mixed on it. It's a shame I can't test one before spending £200 on it

I do wonder if individual cars have different setups because I haven't had this issue at all.

It can only be a difference in either cars or owners - if the former, could it be mileage (I'm approaching 2k) or fuel (I use V Power)? If the latter, am I more acclimatised to the issue and have adapted to it because I had a GT86 before?

Sorry to hear that you are not getting on with the car.

I'm at about 700 miles and running on 95Ron, I'm going to try 97 (as that's what I can get nearby) to see if it matter.

I'm hoping that a remap arrives for it soon, otherwise if the higher octane fuel doesn't help I think it will be moved on.

 

[SJR202]

Just back from a late night drive home and I'm really struggling to live with the throttle on this car. For urban and rural driving, unless your quite a long way into the throttle travel there is a strong likelihood of the stuttering coming back.

It's not just when it's cold, it's there all the time under a light throttle. I've tried the pedal calibration trick, but it didn't really resolve the issue. When I got home and parked up, I found myself wishing I'd taken the other car.

Not what I want to feel about this car.

Does the throttle commander allow the car to be driven smoothly on a light throttle? At the moment I don't see my sticking with the car much longer if this is how it's going to be.

I’ve only used vpower or super/99 in mine and it’s made no difference. Remains almost impossible to drive it smoothly when cold and driving in general it’s not as enjoyable as I’d wish for. Day to day driving it’s just jerky and frustrating, when driving quickly the throttle is pretty much on or off, very hard to regulate any subtle throttle changes. Being lucky I have a Boxster Spyder for the weekend and found myself driving that mainly this summer as it’s a joy, the throttle is smooth and predictable, I’m sadly not looking forward to going back to the 86.
Lots of people say they’ve no issue and a friend just test drive an 86 as they’ve got the new batch ordered and said he didn’t notice any throttle issues.
Know mine was built Apr/May 22 and had to have the software updated for the traction control retrospectively before delivery but no idea if that is a factor. I don’t recall the issue with the demo car i drove however.

Solution to me is having the throttle open according to being pressed like most cars, 80% throttle happens in first 1/2 inch of travel and almost nothing after that so it feels excessively over sensitive.

 

[RedGR86]

I’ve only used vpower or super/99 in mine and it’s made no difference. Remains almost impossible to drive it smoothly when cold and driving in general it’s not as enjoyable as I’d wish for. Day to day driving it’s just jerky and frustrating, when driving quickly the throttle is pretty much on or off, very hard to regulate any subtle throttle changes. Being lucky I have a Boxster Spyder for the weekend and found myself driving that mainly this summer as it’s a joy, the throttle is smooth and predictable, I’m sadly not looking forward to going back to the 86.
Lots of people say they’ve no issue and a friend just test drive an 86 as they’ve got the new batch ordered and said he didn’t notice any throttle issues.
Know mine was built Apr/May 22 and had to have the software updated for the traction control retrospectively before delivery but no idea if that is a factor. I don’t recall the issue with the demo car i drove however.

Solution to me is having the throttle open according to being pressed like most cars, 80% throttle happens in first 1/2 inch of travel and almost nothing after that so it feels excessively over sensitive.

That's a shame. I'll remove that from the list of possible cured then.

The issue I have is that the GR is supposed to be my daily car, and it's proving to be one that I'm not keen to drive at the moment. The 'fun' car is better all round.

 

[Nick]

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?

 

[SJR202]

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?

Thanks Nick, it went in for a 2k mile oil / filter change and spoiler / parking sensors, they said it seemed like their demo car (which wasn’t there at the time) however it seemed that was based around moving it within the compound so not quite the same. I hoped there might be a software update but not aware of anything

 

[RedGR86]

For those who have this issue, humour me and try driving in Track Mode. I've just been for another drive and for the last few miles put it in Track Mode and it felt a lot smoother.

Could be my imagination, could be that something happens to the mapping, would be interested to hear the views of others.

 

[SJR202]

For those who have this issue, humour me and try driving in Track Mode. I've just been for another drive and for the last few miles put it in Track Mode and it felt a lot smoother.

Could be my imagination, could be that something happens to the mapping, would be interested to hear the views of others.

Thanks for that. I’ll give it a go, have not really used track yet

 

[v8s]

I feel the same, I have the throttle commander & feel it helps a little, but certainly not night & day.
Test driving a couple ND MX5s over the weekend !

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.