My wife has just bought another 500.We had a 1.2 Lounge and now a 1.2 S.I am finding the throttle responce very slow and is getting to be a problem when pulling out of junctions.This was never a problem with the Lounge.Does the car need a visit to the dealer or is this how new 500s are.
Technical Euro6 1.2 Throttle Response, Hill Start Issues & Watchdog report
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Technical Euro6 1.2 Throttle Response, Hill Start Issues & Watchdog report
re: Euro6 1.2 Throttle Response & Hill Start Issues
Have you got different size wheels to the old car?
Have you got different size wheels to the old car?
re: Euro6 1.2 Throttle Response & Hill Start Issues
Could be just that it's new and needs to be run in and loosened up whereas you were used to the lounge which I'm guessing had a few thousand miles up at least? There's a marked difference between a new 1.2 and one with a few K.
Could be just that it's new and needs to be run in and loosened up whereas you were used to the lounge which I'm guessing had a few thousand miles up at least? There's a marked difference between a new 1.2 and one with a few K.
re: Euro6 1.2 Throttle Response & Hill Start Issues
There is, there's also a different between going from 14 to 15" wheels and then about the same going from 15 to 16 " wheels
re: Euro6 1.2 Throttle Response & Hill Start Issues
dealer visit,
sounds like it could be unsafe,
Charlie
dealer visit,
sounds like it could be unsafe,
Charlie
re: Euro6 1.2 Throttle Response & Hill Start Issues
How much of a delay are we talking about?
How much of a delay are we talking about?
re: Euro6 1.2 Throttle Response & Hill Start Issues
You'll have to explain this one to me, please. I'd have to look up 14" tyre size for 500, but having personal experience there is hardly any difference in rolling radius of the 185/55 R15 and 195/45 R16, in fact it's slightly in favour of 16's.
So, as far as I'm aware moving from 15's to 16's fitted by FIAT would have no effect on throttle response of a 500
Cheers
Steve
There is, there's also a different between going from 14 to 15" wheels and then about the same going from 15 to 16 " wheels
You'll have to explain this one to me, please. I'd have to look up 14" tyre size for 500, but having personal experience there is hardly any difference in rolling radius of the 185/55 R15 and 195/45 R16, in fact it's slightly in favour of 16's.
So, as far as I'm aware moving from 15's to 16's fitted by FIAT would have no effect on throttle response of a 500
Cheers
Steve
re: Euro6 1.2 Throttle Response & Hill Start Issues
It's nothing to do with rolling radius, it's down to rolling resistance and weight.
14" 175/65 R14 82T
15" 185/55 R15 82H
16" 195/45 R16 84H
The bigger wheels use a wider tyre which increases rolling resistance. 16" wheels also use 84 load rating tyres which will be slightly heavier than 82 rated ones.
The biggest difference is in the weight of the rim. 14" steel wheels with tyres weigh sod all, 15" alloys weigh more and 16" alloys weigh an absolute tonne with tyres fitted.
These two things couple together to make quite a big difference, I find myself getting at least a 10% difference in fuel economy going from a smaller size to my summer tyres on 16's. This is over 60k miles of usage.
It's nothing to do with rolling radius, it's down to rolling resistance and weight.
14" 175/65 R14 82T
15" 185/55 R15 82H
16" 195/45 R16 84H
The bigger wheels use a wider tyre which increases rolling resistance. 16" wheels also use 84 load rating tyres which will be slightly heavier than 82 rated ones.
The biggest difference is in the weight of the rim. 14" steel wheels with tyres weigh sod all, 15" alloys weigh more and 16" alloys weigh an absolute tonne with tyres fitted.
These two things couple together to make quite a big difference, I find myself getting at least a 10% difference in fuel economy going from a smaller size to my summer tyres on 16's. This is over 60k miles of usage.
re: Euro6 1.2 Throttle Response & Hill Start Issues
pretty much what I was thinking ; - }
pretty much what I was thinking ; - }
re: Euro6 1.2 Throttle Response & Hill Start Issues
I am prepared to be shot down ...does it have an eco button ? Mine does and when using it it is slightly slower to pull away..
I am prepared to be shot down
...does it have an eco button ? Mine does and when using it it is slightly slower to pull away..
re: Euro6 1.2 Throttle Response & Hill Start Issues
1.2's don't have an eco button, only twinairs
1.2's don't have an eco button, only twinairs
re: Euro6 1.2 Throttle Response & Hill Start Issues
I think that's only the TA that does that, my lounge TA certainly does.
I am prepared to be shot down
I think that's only the TA that does that, my lounge TA certainly does.
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re: Euro6 1.2 Throttle Response & Hill Start Issues
Nothing to do with wheel size though if the op can replicate the problem in neutral.
It's some sort of pedal to throttle problem.
1.6 Stilo's were dreadful in this respect. In mine I could floor the pedal and bring it up again before the engine responded making quick getaways at junctions a nightmare. Ok if you were stopped at lights and had time to get the engine sorted.
I changed the 16 inch wheels on my Mito for 18's and yes it felt ever so slighly less nippy, but caused not problems whatsoever.
Nothing to do with wheel size though if the op can replicate the problem in neutral.
It's some sort of pedal to throttle problem.
1.6 Stilo's were dreadful in this respect. In mine I could floor the pedal and bring it up again before the engine responded making quick getaways at junctions a nightmare. Ok if you were stopped at lights and had time to get the engine sorted.
I changed the 16 inch wheels on my Mito for 18's and yes it felt ever so slighly less nippy, but caused not problems whatsoever.
re: Euro6 1.2 Throttle Response & Hill Start Issues
Yeah, if it's playing up in neutral the obviously there's something funny going on.
Yeah, if it's playing up in neutral the obviously there's something funny going on.
re: Euro6 1.2 Throttle Response & Hill Start Issues
The point about there being hardly no difference in rolling radius is that there is no change in gearing.
As before, there would be no notable difference in throttle response on a 500 running 15" or 16" wheels and tyres fitted by FIAT, which is what this post is about.
The point about there being hardly no difference in rolling radius is that there is no change in gearing.
As before, there would be no notable difference in throttle response on a 500 running 15" or 16" wheels and tyres fitted by FIAT, which is what this post is about.
re: Euro6 1.2 Throttle Response & Hill Start Issues
After I made my suggestion, the OP clarified their situation and stated that the issue occurs in neutral which means that obviously there is a sort of lag between throttle input at the pedal and it happening on the throttle body.
Heavier wheels will make a car accelerate more slowly than one with lighter wheels, it's basic physics. If you add 3 kg's to each wheel then that's 12 extra kilos you have to accelerate forward and also 12kg's of rotational mass which is more significant as it makes a bigger difference as you're only considering things like the crank, camshafts, flywheel, geabox internals, tyres, wheels, driveshafts as well as anything else that spins and is connected to the drivetrain.
Obviously a difference in wheels isn't the difference here, but the combination of going from a lounge with a well run in engine to one with bigger wheels and a new engine would make a big difference that some people could consider to be a less responsive throttle. That was why I went down that route.
Just let me clarify, there is a difference when going between different wheel sizes and if you've been driving around on a car with light wheels and skinny tyres and go to a set of heavier wheels with narrow tyres then the car can feel sluggish and less responsive. Obviously that's not the case here though.
After I made my suggestion, the OP clarified their situation and stated that the issue occurs in neutral which means that obviously there is a sort of lag between throttle input at the pedal and it happening on the throttle body.
Heavier wheels will make a car accelerate more slowly than one with lighter wheels, it's basic physics. If you add 3 kg's to each wheel then that's 12 extra kilos you have to accelerate forward and also 12kg's of rotational mass which is more significant as it makes a bigger difference as you're only considering things like the crank, camshafts, flywheel, geabox internals, tyres, wheels, driveshafts as well as anything else that spins and is connected to the drivetrain.
Obviously a difference in wheels isn't the difference here, but the combination of going from a lounge with a well run in engine to one with bigger wheels and a new engine would make a big difference that some people could consider to be a less responsive throttle. That was why I went down that route.
Just let me clarify, there is a difference when going between different wheel sizes and if you've been driving around on a car with light wheels and skinny tyres and go to a set of heavier wheels with narrow tyres then the car can feel sluggish and less responsive. Obviously that's not the case here though.
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re: Euro6 1.2 Throttle Response & Hill Start Issues
The throttle relearn procedure for the Stilo, I think it'd be a good starting point
https://www.fiatforum.com/newbie-central/292687-throttle-body-relearn.html
The throttle relearn procedure for the Stilo, I think it'd be a good starting point
https://www.fiatforum.com/newbie-central/292687-throttle-body-relearn.html