Vehicle Juddering at speed

Faults and Technical chat for the Vauxhall Grandland
Bryan S
Posts: 1
Joined: Fri Mar 19, 2021 6:48 pm

Re: Vehicle Juddering at speed

Post by Bryan S » Fri Mar 19, 2021 6:54 pm

Hi guys, any update on this issue. We have had ours to the vauxhall garage and they were unable to find anything. 8 months later its returned a lot worse to the point the car is basically un drivable. There is no a horrible ticking sound rattling away as well and it gets worse when changing gears. Any help would be appreciated. Thanks

TW1583
Posts: 5
Joined: Wed Jul 15, 2020 8:01 am

Re: Vehicle Juddering at speed

Post by TW1583 » Tue Mar 23, 2021 8:26 am

Hi
Yes our problem was finally solved. Essentially it’s linked to the regular feature on the engine management system that refreshes the particle filter in the exhaust system. About ever 250 - 300 miles, depending on the type of driving you do, the fuelling system makes the engine run hotter to recycle and refresh the particulate filter. The problem with our car was that it had a build up of carbon on the exhaust valves causing them to stick slightly and not open fully which under normal driving didn’t cause any immediately apparent problems. However when the system refreshed itself, ran hotter and produced more exhaust the sticking valves didn’t allow it to fully exhaust, which caused the juddering almost lie a missfire. As this only happened when it recycled it was an intermittent problem which was very difficult to find. I ended up keeping a log of the mileage it happened on and the dealer was able to check this against the system recycling log when they plugged it into their diagnostic computer. Took quite a while to find the issue but I was very lucky to have a really good dealership with a very determined service manager who kept going until it was solved. Hope this helps if you need more info let me know 👍🏻

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