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Topic: traction control (Read 517 times) |
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Torbayboy
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Posts: 848
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traction control
« on: Mar 15th, 2019, 1:54pm » |
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Noticed that traction control was cutting in when not needed (slight uphill slightly damp road and not pushing it at all) seems to hold back pedal and shift a gear - light flashes for 3-5seconds, cannot figure out why.
SO... I switched it off 
Any ideas? Have had the notorious lazy airbag on at times also, but this has since cleared with t/c off.....so far (its a Scorpio so anything can happen
All comments welcome
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Cosworth Scorpio only 46 on the road now NOW down to 42.
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a900one
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A scorpio is for life not just for christmas
Posts: 980
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Re: traction control
« Reply #1 on: Mar 15th, 2019, 2:12pm » |
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Have you had any new tyres as that made mine playup, speed was about 50 mph.
Gerald
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Torbayboy
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Posts: 848
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Re: traction control
« Reply #2 on: Mar 15th, 2019, 7:35pm » |
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Hello Gerald.
Had "new" to me tyres lately, from "Movvy" who came with a spare set of (sexy) black 12 spokes - they look lovely too, on the state blue cossie saloon.
Tyres are hardly used and the teardrops I had with the car had michelins on (fall apart before they wear out specials), so yes it has had certainly all new to this car wheels and tyres fitted.
How did yours work out in the end?
Roy
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a900one
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A scorpio is for life not just for christmas
Posts: 980
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Re: traction control
« Reply #3 on: Mar 15th, 2019, 9:19pm » |
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I swopped fronts to rear and that sorted it. They were the new ones I had put on the front to start with. I could not go over 50 with the TC on.
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Torbayboy
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Posts: 848
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Re: traction control
« Reply #4 on: Mar 16th, 2019, 9:29am » |
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Hi
I cant do that with these as 2 different sizes 
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Cosworth Scorpio only 46 on the road now NOW down to 42.
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PJDavis
Senior Member
2 x 1995 Jag X300 3.2 / 4.0 (Henley) 1957 XK140
Posts: 1474
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Re: traction control
« Reply #5 on: Mar 17th, 2019, 5:20pm » |
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Roy. The TC won't like the thinner tyres being on the driving-axle, and possibly not like the fact that they are chunkier. The tyres will definitely grip differently which will upset the TC.
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I love 'Movvy'
1995 Jaguar XJ6 X300 3.2 (Henley)
1995 Jaguar XJ6 X330 4.0 (Dopey)
1957 Jaguar XK140 USA (converted to RHD, and to have fitted Mk10 420G Engine with BW 65 Auto Trans)
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Scorpio_Mike
Senior Member
Jeep Grand Cherokee 3.0 V6 & 2.8 Sierra XR4i 4x4
Posts: 2354
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Re: traction control
« Reply #6 on: Mar 17th, 2019, 5:23pm » |
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Difference in rolling radius between front & rear tyres as little as 2% can cause the sensors to throw a wobbly.
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Star sign is Scorpio !
Sierra XR4i's are great...especially when fitted with 4WD 
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Torbayboy
Full Member
Posts: 848
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Re: traction control
« Reply #7 on: Mar 17th, 2019, 7:35pm » |
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Thanks for all your help.
looks like 2 of the tyres need swapping out as Mike has pointed out the rolling radii are quite different.
Spannerman (actually a qualified MOT tester and lecturer in car mechanics) looked into which should go on the rear axle,and as Peter has noted the "skinnies" are at the back, so will have to look again.
Another point is am Iactually damaging the T/C system?
When it happens it is not the normal way the T/C lights up, more of a steady "warning" type of 2-5 seconds of flashing, like the O/D light when your gearbox is dying!!
Can I temporarily cure this by simply turning T/C off?-troble there though is when you turn off the ignition the nexct time you start up the default is T/C on
Was going to take the car for a short planned holiday next week, but unless this is resolved or definately safe to use with take the estae instead
Thanks all.
Roy
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Torbayboy
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Posts: 848
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Re: traction control
« Reply #8 on: Mar 24th, 2019, 7:04pm » |
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traction control will now not turn off on the switch, light takes some 8-10 seconds to go out now on start up. Have not been able to go to spanner man, and am away later this week for a few days
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