991 , 911 Tracking Issue - anyone else experienced this ? - Page 1 - 911/Carrera GT - PistonHeads UK

Anyone else had this issue : Driving my 991 C2S Cab. at 70 (ish) in dry warm conditions on a good road ; the car starts to pull strongly to the left - have to forcibly add and hold opposite lock to keep in a straight line - after a good few seconds or so the car then "snaps" back to normal and then a minute or so later does it again : Intermittent issue - but quite scary when it happens - feels most odd - I assume it's a tracking issue but the strength of the "pull" followed by the "snapping" realignment makes it feel unlike one that I've ever experienced before - well I say that , but it has also happened on another occasion in an identical loan car. I have had my car for 18 months and this issue happened yesterday - fine before that ? Answers on a postcard please Edited by RSVP911 on Sunday 20th July 20:29

There was a thread on 911uk.com about some 991s experiencing electric steering problems, symptom was violent pull to one side Found the thread http://911uk.com/viewtopic.php?t=90080

Wilmslowboy said: There was a thread on 911uk.com about some 991s experiencing electric steering problems, symptom was violent pull to one side Found the thread http://911uk.com/viewtopic.php?t=90080 Thanks very much - this pretty much describes the issue - very useful . Please keep the replies coming though , Regards

Have you changed a tyre recently? I had exactly the same problem and eventually worked out that kwik fit had fitted an Aston Martin Pirelli pzero instead of a Porsche one - you can see the AM in small letters on the tyre wall. Kwik fit made a fuss about changing it, first saying that I'd ordered the wrong tyre - I went through the booking system and it still came up with the wrong tyre. They then claimed it was an identical tyre anyway and won't make a difference but I forced them to change it and all back to normal, I also realised how poorly it'd been handling. Kwik fit need to sort this as I'm sure they've fitted lots of AM tyres onto the 991 by now.

alphonso said: Have you changed a tyre recently? I had exactly the same problem and eventually worked out that kwik fit had fitted an Aston Martin Pirelli pzero instead of a Porsche one - you can see the AM in small letters on the tyre wall. Kwik fit made a fuss about changing it, first saying that I'd ordered the wrong tyre - I went through the booking system and it still came up with the wrong tyre. They then claimed it was an identical tyre anyway and won't make a difference but I forced them to change it and all back to normal, I also realised how poorly it'd been handling. Kwik fit need to sort this as I'm sure they've fitted lots of AM tyres onto the 991 by now. Thanks for this , very strange though as I thought " you can't get better than a quick fit fitter " however , I'm still running the original tyres , done less than 10,000 miles - treads worn from new , but perfectly legal

May just be HGV grooves worn in the road. Some tyres seem more prone to it than others. It can be quite a shock when you first come across them as they're not always obvious.

I'm not familiar with the spec of a 991 but I have had cars with "lane assist" systems, where the steering wheel moves to alert you when it assumes you're falling asleep or just not paying attention to where you're going - a 635d just waggled the wheel a bit, whereas a Lexus LS460 gave a sudden jerk, which was rather disconcerting when it first happened (I was neither dozing nor inattentive at the time ). If your car has such a feature then it could be that kicking in (perhaps when it shouldn't)?

thegoose said: I'm not familiar with the spec of a 991 but I have had cars with "lane assist" systems, where the steering wheel moves to alert you when it assumes you're falling asleep or just not paying attention to where you're going - a 635d just waggled the wheel a bit, whereas a Lexus LS460 gave a sudden jerk, which was rather disconcerting when it first happened (I was neither dozing nor inattentive at the time ). If your car has such a feature then it could be that kicking in (perhaps when it shouldn't)? Thanks for this - nice thought , but the car doesn't have this feature

Lancerlot said: May just be HGV grooves worn in the road. Some tyres seem more prone to it than others. It can be quite a shock when you first come across them as they're not always obvious. You know what maybe this was the issue - I will look out for this , Cheers

Turns out I had a flat tyre - all very embarrassing - sorry !

RSVP911 said: Turns out I had a flat tyre - all very embarrassing - sorry ! At least you were man enough to own up to it.

RSVP911 said: Turns out I had a flat tyre - all very embarrassing - sorry ! was going to add... happened exactly same to me, sharp pull to left, same issue NSR with nice wee nail and sitting at 21psi, £370 later at OPC (shouldn't get the free mints and couple of extra warranty jobs they added on) all was good

Common occurrence. The tyres have such low profiles it's hard to tell. Better spec Tyre Pressure Sensors next time very useful option.

Wierd thing was it was the first thing I did - proper man check : kicked all four - seemed fine to me