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(Post Link) post #1 of 43 Old 19-09-16 Thread Starter
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car pulls to the right under braking

Hi All,

I have just had new brake discs, pads, braided brake lines and tyres fitted. All new, all good kit and all the calipers were cleaned out - nothing sticking or binding etc.

On gentle braking there is not really anything noticeable, however under harder braking (without ABS kicking in) the car dives to the right and I need to apply corrective steering to prevent a lane change for example.

If the ABS is triggered then the EBD more or less sorts it out, but not 100%.

NS upper suspension arm just replaced, could an older/more worn OS arm cause this? I'd can't see how it would but I'm no expert....

Cheers All

'08 159 Lusso 2.4JTDm Q-Tronic Sportwagon
'98 Fiat Coupe 20v Turbo

Last edited by Larry92; 19-09-16 at 16:04.
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What does the brake pedal feel like?

I'd check the brake lines for an air lock/re-bleed if this is an issue on a straight, flat road.

I know that for the Brembos, if you get air in one side of the caliper (I'm thinking of the outer bank primarily as they are fed by the inner bank) you won't get full pressure on that side. Hence the caliper losses effectiveness.

If it pulls to the left, check the right hand caliper and vice versa.


Hope that helps.



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Obvious questions second, of course....

Is it a 3.2, 2.4 or Ti?

Also, did it do it before?

Really should've asked those first....

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Have you covered the basics, ie checked tyre pressures...?
Also check that all four tyres are actually the same.
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(Post Link) post #5 of 43 Old 19-09-16 Thread Starter
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What does the brake pedal feel like?

I'd check the brake lines for an air lock/re-bleed if this is an issue on a straight, flat road.

I know that for the Brembos, if you get air in one side of the caliper (I'm thinking of the outer bank primarily as they are fed by the inner bank) you won't get full pressure on that side. Hence the caliper losses effectiveness.

If it pulls to the left, check the right hand caliper and vice versa.


Hope that helps.



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Pedal feels fine to be honest, firmer than before....I think the most likely culprit is as you suggest, but I would have thought it'd be more obvious in the pedal. On the other hand, I can push the pedal to the floor, not easily, but it isn't as difficult as I would have expected given new braided lines etc for perhaps this is the issue.

It's a bit tricky find a flat level road!, but it pulls to the right even on roads where it cambers left (as most do) so im fairly sure it isn't a road surface induced drift

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Obvious questions second, of course....

Is it a 3.2, 2.4 or Ti?

Also, did it do it before?

Really should've asked those first....

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Sorry, 2.4...it's in my siggy but should have clarified this, sorry.

I did not do this before, but I've changed literally every possible component in one go so hard to pinpoint the exactly issue!

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Have you covered the basics, ie checked tyre pressures...?
Also check that all four tyres are actually the same.
yeh the tyres were fitted new at the time, I bought them myself before hand and took to the garage. Brand new GY eagle F1 assym 3s so not a shoddy tyre haha
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yeh the tyres were fitted new at the time, I bought them myself before hand and took to the garage. Brand new GY eagle F1 assym 3s so not a shoddy tyre haha
Same batch numbers & dates?
and you've checked the pressures??
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Same batch numbers & dates?
and you've checked the pressures??
I'll check the batch and dates this pm, and double check the pressures
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When Autolusso replaced my calipers, discs and pads, the braking wasn't balanced on one side at the MOT, so Ned found a quiet straight road and jumped on the brakes very hard a few times......sorted perfectly
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Grease, brake fluid or other contaminant on disc or pads on the opposing side (from mucky fingers etc) would have a similar effect. It's easy to forget to clean thoroughly once fitted. Worth checking.
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When Autolusso replaced my calipers, discs and pads, the braking wasn't balanced on one side at the MOT, so Ned found a quiet straight road and jumped on the brakes very hard a few times......sorted perfectly
yeh this is my next self-fixing thought.....I thought my run down the m6 from Kendal in the wee hours of sunday morning would give me a chance to stomp on them from 'somewhere north' of 70...and that might fully bed them in and remove anything left on the discs...but there was too much traffic! I couldn't believe it!

Will certainly give it a go when I have a chance
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Just thinking about the braided lines you've had fitted. Have you inspected them for any kinks? Due to the 90° nature of the radius the line goes through out of the back of the caliper they are prone to crease along that radius, or so I'm told.

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Just thinking about the braided lines you've had fitted. Have you inspected them for any kinks? Due to the 90° nature of the radius the line goes through out of the back of the caliper they are prone to crease along that radius, or so I'm told.

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I shall have a look this evening. I had the work done at a reputable alfa indie. I've never used them before but they have a good reputation and I trust them.....sounds stupid but you just get a good feeling about some places, so I have no reason to doubt the quality of their work....that said, I'll have a look....also because i'm curious to see how they look haha.
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I shall have a look this evening. I had the work done at a reputable alfa indie. I've never used them before but they have a good reputation and I trust them.....sounds stupid but you just get a good feeling about some places, so I have no reason to doubt the quality of their work....that said, I'll have a look....also because i'm curious to see how they look haha.
Not saying it's the case, but just a thought.

FWIW my Alfa specialist advised me against them citing that reason.

Fingers crossed it'll be something simple.

Forums are a great place to ask about a rattle and be advised to scrap your car!

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Not saying it's the case, but just a thought.

FWIW my Alfa specialist advised me against them citing that reason.

Fingers crossed it'll be something simple.

Forums are a great place to ask about a rattle and be advised to scrap your car!

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Oh yes for sure haha, well be default its baised here toward people who have a problem.....people rarely pipe up about things being sweet as a nut haha.

I've spoken to the garage and they are happy to have a look if I swing by on saturday so no gripes there at all, I just like being a smidgen self suffient...plus I'm impatient.

I have to say, the car stops like nothing else now. The speedo needle just plummets if I stomp
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& she goes straight when under max. Accel? :-)
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& she goes straight when under max. Accel? :-)
yeh she is fine when driving, no issues
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Originally Posted by Larry92 View Post
yeh this is my next self-fixing thought.....I thought my run down the m6 from Kendal in the wee hours of sunday morning would give me a chance to stomp on them from 'somewhere north' of 70...and that might fully bed them in and remove anything left on the discs...but there was too much traffic! I couldn't believe it!

Will certainly give it a go when I have a chance
Give it a check of and make sure everything is clean and tight with no leaks, no rubbing etc, if everything looks OK take the car out and on a clear road stand on the brakes from 60-70 and get them nice and hot to bed them in, see how you go then

Ned
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Give it a check of and make sure everything is clean and tight with no leaks, no rubbing etc, if everything looks OK take the car out and on a clear road stand on the brakes from 60-70 and get them nice and hot to bed them in, see how you go then

Ned
Cheers Ned, I'll certainly do that a few times when I find a decent stretch of road. I have to say, those PF pads (and I stuck ebc red stuff on the back) with new brembos all round and on nice new rubber, are incredible. Seeing the speedo needle plummet is a site to behold

In fact, I had an experiment with them the other night and stomped from 30 and it stalled the car...autobox couldn't sort itself in time is my guess
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Ive had a good look, and no kinks in the braided lines, no leakages at the connection points, tyres all made in week 25 of 2016.

I checked tyre pressures, they were all a couple of PSI below the recommended...except front right was 4 below, meaning it was 2 psi less than the front left. now it was to the right the car pulled under mod/heavy braking so that figures....but surely 2 psi isn't enough to have that significant an effect?? I guess I shall see.....

Will update once I have done my brake stamping later this week.
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I checked tyre pressures, they were all a couple of PSI below the recommended...except front right was 4 below, meaning it was 2 psi less than the front left. now it was to the right the car pulled under mod/heavy braking so that figures....but surely 2 psi isn't enough to have that significant an effect?? I guess I shall see.....
You never know and its always worth covering the basics first, especially when they cost nothing.
Properly bedding in the brake pads is likely to be the big fix. If you'd mentioned the pads used then that may have come up sooner.
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You never know and its always worth covering the basics first, especially when they cost nothing.
Properly bedding in the brake pads is likely to be the big fix. If you'd mentioned the pads used then that may have come up sooner.
true - I';ve done a few hundred miles on them already so I figured they should be bedded in by now, but I guess maybe not
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true - I';ve done a few hundred miles on them already so I figured they should be bedded in by now, but I guess maybe not
Most performance pads need an extreme bedding in procedure, which for some will be done in under 10-minutes!!
Being too gentle upsets them a bit!
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Most performance pads need an extreme bedding in procedure, which for some will be done in under 10-minutes!!
Being too gentle upsets them a bit!
Yeh I have done a bit of stomping, but not had a quiet enough road yet to get in a long hard brake haha
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Back to the tyres.....Assy3.....are these the standards or the Jaguar fitment (should be a J stamped inside I think). I went with the J's as these have a more strengthened sidewall, which will resist excessive flex with the 2.4 front weight when hard braking and cornering.
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Back to the tyres.....Assy3.....are these the standards or the Jaguar fitment (should be a J stamped inside I think). I went with the J's as these have a more strengthened sidewall, which will resist excessive flex with the 2.4 front weight when hard braking and cornering.
I don't recall it being stated they were jag fitment, and I didn't see it stamped...but then I didn't look at the inside wall too much and its a bit late now without having the wheel off haha, but they are XL Extra Load rated for exactly that reason....
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