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Old 26-02-2017   #1891
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Re: Euro6 1.2 Throttle Response, Hill Start Issues & Watchdog report

Bought a 63 plate 1.2 Euro6 500sport convertible from the Watford dealer last June. Toured all round the coast of Spain in it for a month last Summer. The car was adequate, but failed to get up a couple of very steep hills. It would slow down on hilly dual carriageways (5 to 3 gear 70 to 50) and underground parking garage ramps were also very touch and go. We liked the car, but felt it was gutless.
I had my local fiat specialist remap the ECU and its like a completely different car! Like unstrapping an elephant from the back. The car no longer is hesitant, I don't need to change down to 3rd on hilly dual carriageways and it races away from roundabouts like you would expect a little rev happy 1.2 engine to do!
Cost 260 and has transformed the car.
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Old 26-02-2017   #1892
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Re: Euro6 1.2 Throttle Response, Hill Start Issues & Watchdog report

Oh and as for a test drive when buying the car.... Fiat said we couldn't test drive the car, as it was in the middle of 40 cars on their forecourt... we tested a newer demonstrator which drive completely differently!
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Old 26-02-2017   #1893
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Re: Euro6 1.2 Throttle Response, Hill Start Issues & Watchdog report

Quote Originally Posted by p6baseunit View Post
Fiat said we couldn't test drive the car, as it was in the middle of 40 cars on their forecourt...
My reply would be: "Apparently you don't want me as a customer. Goodbye."
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Old 09-08-2017   #1894
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Re: Euro6 1.2 Throttle Response, Hill Start Issues & Watchdog report

Hi All,

I stumbled across this interesting thread after my daughter complained about her Fiat 500 being a bit fussy when pulling away. It's a 63 plate (registered Jan 2014) and she's had it for a month or so. I've driven it and it has the increase in revs as the clutch is raised reported in this thread. I drive a diesel and the governor does a similar thing so it isn't that noticeable to me, but she has upgraded from an old Ka and can notice a difference - she put it down to her driving in the early days but 1000 miles further on I'm not so sure!!

She loves her Fiat 500 but this trait is taking the edge off her enjoyment. It looks like Fiat are in denial so could one of you enthusiasts please tell me where this clutch sensor/potentiometer thing is and how easy it is to disable it. Also, does disabling it have any other side effects?

What I'd like to do is secretly disconnect it (or try some other DIY fix if there is one!) and see if she notices a difference!!

Any help and advice would be much appreciated!

Mike
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Old 09-08-2017   #1895
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Re: Euro6 1.2 Throttle Response, Hill Start Issues & Watchdog report

Quote Originally Posted by HVF Fiat500 View Post
Hi All,

I stumbled across this interesting thread after my daughter complained about her Fiat 500 being a bit fussy when pulling away. It's a 63 plate (registered Jan 2014) and she's had it for a month or so. I've driven it and it has the increase in revs as the clutch is raised reported in this thread. I drive a diesel and the governor does a similar thing so it isn't that noticeable to me, but she has upgraded from an old Ka and can notice a difference - she put it down to her driving in the early days but 1000 miles further on I'm not so sure!!

She loves her Fiat 500 but this trait is taking the edge off her enjoyment. It looks like Fiat are in denial so could one of you enthusiasts please tell me where this clutch sensor/potentiometer thing is and how easy it is to disable it. Also, does disabling it have any other side effects?

What I'd like to do is secretly disconnect it (or try some other DIY fix if there is one!) and see if she notices a difference!!

Any help and advice would be much appreciated!

Mike
If you just disconnect the wiring, you'll trigger error messages you don't want.

Some have dealt with this by physically removing the clutch position sensor with the wiring still connected, and tying it up out of the way.

It's also worth checking with a Fiat dealership to find out if there is a software update for your car.
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Old 10-08-2017   #1896
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Re: Euro6 1.2 Throttle Response, Hill Start Issues & Watchdog report

I believe I have this issue on my 2013 Pop, here in Australia.

The issue is when I want to move from standing, in a way I drove my old car, the revs would suddenly rise above 2500 and then suddenly drop. This would cause a loss of power and car would suddenly slow down.

I changed spark plugs and air filter, thinking this would sort it, but it didn't.

I am not overly concerned to be honest, as I have adapted my self and would hold the clutch for a half a second longer and get the revs steady at just below 2000 before moving off.
I find it more prevalent (or a bit harder to control) when hill-holder is engaged.

I will be getting a remap eventually, so I will update if that makes a difference.
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Last edited by PZ500; 10-08-2017 at 04:22.
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Old 10-08-2017   #1897
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Re: Euro6 1.2 Throttle Response, Hill Start Issues & Watchdog report

@PZ500 2500 rpm... that is odd...


Have you got a clutch switch..??
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Old 10-08-2017   #1898
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Quote Originally Posted by varesecrazy View Post
@PZ500 2500 rpm... that is odd...


Have you got a clutch switch..??
No clutch switch.

It reminds me of driving a Citroen xsara vts. Had to get the revs to about 1500-2000 before driving off.

If I don't steady the revs on Fiat, I can feel that flat spot everyone talks about and I can see how it can be dangerous when joining traffic.

But, to be honest it is not too much of an issue for me. I don't have to rev the engine very high and I can still have a smooth and quick take off.
Remap might fix it, but if it doesn't it is not an issue for me.
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Old 10-08-2017   #1899
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Re: Euro6 1.2 Throttle Response, Hill Start Issues & Watchdog report

Remap.. probably best option.

You've tried removing battery power ?overnight..to see if the factory presets are better than its LEARNT current set-up

Charlie
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Last edited by varesecrazy; 10-08-2017 at 07:18.
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Old 15-08-2017   #1900
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Quote Originally Posted by varesecrazy View Post
Remap.. probably best option.

You've tried removing battery power ?overnight..to see if the factory presets are better than its LEARNT current set-up

Charlie
I haven't tried that, don't want to muck around with Ecu, etc.
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Old 15-08-2017   #1901
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Re: Euro6 1.2 Throttle Response, Hill Start Issues & Watchdog report

HVF, when you say the revs rise as the clutch is raised, does this allow you to pull away without touching the accelerator? My 500X does this, raising the clutch pedal increases the revs to 1000rpm, the car pulls away, and you then feed in throttle. A bit strange, but I've got used to it, and find it quite handy for low speed maneouvering. The ECU keeps the engine at 1000rpm whenever the clutch is engaged. It can be a bit disconcerting when you lift off the throttle and the car doesn't slow down until you dip the clutch though.
Does it have the problem of pulling away up hill though?
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Old 15-08-2017   #1902
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Re: Euro6 1.2 Throttle Response, Hill Start Issues & Watchdog report

Hi TrevC,

Yes, that's it! Raise the clutch and the revs increase to around 1000rpm. As you say, great for slow speed manoeuvring and parking. It's my daughters car and she says it isn't very smooth pulling away, it seems to pause just after launch as the ECU changes the throttle control from clutch switch to throttle potentiometer. It is exasperated on a hill start as, just after pulling away, there is a little lurch (caused by the higher throttle setting I suppose).

I was going to experiment with removing the switch and seeing if that helps, I realise we'll loose the SS but i might be worth a try.

Could anyone please advise where the pesky little thing is?

Many thanks,
Mike
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Old 16-08-2017   #1903
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Re: Euro6 1.2 Throttle Response, Hill Start Issues & Watchdog report

I would suggest she perseveres and gets used to it, as I have on my 500X. If you start messing with the clutch pedal sensors, you could be opening a whole can of worms.
I've a feeling that when I read about this on the 500X forum, one of the more knowledgable contributors stated that the clutch pedal sensor was a proportional position indicator, like a potentiometer, rather than a switch. I've had a look but I can't find the post again.
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Old 16-08-2017   #1904
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Re: Euro6 1.2 Throttle Response, Hill Start Issues & Watchdog report

Thanks TrevC, I think you are right about it being a potentiometer rather than a switch. As I recall, the revs increase proportionately as the clutch pedal is slowly raised, it doesn't suddenly jump to circa 1000rpm.

The car will be visiting this w/e so I'll double check.
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Old 16-08-2017   #1905
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Re: Euro6 1.2 Throttle Response, Hill Start Issues & Watchdog report

If you disconnect the wiring to the sensor, then you'll get an error message.

Sone have just removed the sensor & wiring complete and taped it out of the way.
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