Vehicle Juddering at speed

Faults and Technical chat for the Vauxhall Grandland
Bryan S
Posts: 2
Joined: Fri Mar 19, 2021 6:48 pm

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

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

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

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 👍🏻

Bryan S
Posts: 2
Joined: Fri Mar 19, 2021 6:48 pm

Post by Bryan S » Sun Sep 12, 2021 8:47 pm

I have just noticed this reply. We have had the car in the garage a further 2 times and they changed the fly wheel only for the issue to come back a few months later. The car is now out of warranty so the garage dealing with it said I would have to pay for labour on any diagnostics. After a call with Trading Stardards the garage have now passed me over to Vauxhall head office to investigate as they are at a loss to what the fault could be.
I will show them your response and see if they are able to do anything. Hopefully this could be the end of it, I'm guessing your car has been fine since?

Posts: 1
Joined: Wed Sep 15, 2021 6:46 pm

Post by MarkT1976 » Wed Sep 15, 2021 7:00 pm

My car has been in for 4 Months while they worked on the issue and I finally got it back today. I had been having the same problem for 18 Months from 9000 miles and after a lot of effort on the dealerships part plus Video clearly showing the problem I finally have a solution.
The Exhaust Valves were intermittently sticking open causing the miss fire problem without any fault codes. Vauxhall have redesigned the valves.
When they tried to fit the new valves they discovered that the valves sticking had caused damage to the surface by excessively pitting the Aluminium. End result New Head with redesigned Valves fitted. So far no reoccurrence but I'll keep you all informed if this changes.

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