Hi all.

So last week my wife was driving home, had done about 300 miles that day. Then about a mile from home, she said the whole car wobbled and could feel a throbbing through the accelerator pedal. The closest she could equate it to would be a rock in the breaks kinda bad grinding, but different with the whole car shaking and only intermittently when accelerating.

The next day we drove around the block and nothing.

It's not our daily, so it's been parked up. Then last night we start to head out for the weekend. It happened as I was driving. Totally random, once from a stop light, the other going from 30 to 40 mph. I tried to get a video to get the sound but failed.

The good ol' dealer can't get us in for a week and a half, and that's only to diag!!

There were no faults in the GAP IID tool.

Any thoughts as to what a non-mechanically me could look at?

What gets me is that it's not consistent or reproducible.

Thanks!

 

one thing might be to look at the misfire counts. There is one live value that keeps a record of the last 5 drives and one that looks at the current one. Misfires per a certain thousand revs.

 

Agree with gavin. I had this happen and the crazy thing is that it set no fault code nd no check engine light. Eratic thudding. Needless to say, pulled the spark plugs and found the culprit. Crack in the ceramic

Replaced all the plugs and symptom gone. This was at 120k. I had replaced them once already at 60k. Funny thing was that this happened again shortly after. Replaced one ignition coil and it subsided. Then again. Replaced another. Ended up replacing all 4 coils and now it had been 10k miles and no issue.

 

Thanks @GavinC and @sarek , I'll check these in the GAP Tool. I'll also re-watch @PowerfulUK vid on him doing the same on his 90. I thought he got a check engine light. Which is why I assumed it wouldn't be plugs.

Thanks once again!

 

I did not get a fault code or check engine light. It has to be a persistent dead miss to set a code. Powerful uk didn't have a warning light either