Strange noise when setting of on hill

Maintenance/Repairs
#1

When setting off on an a hill or under load the car makes a vibrating noise and the revs drop below 1 but once set of runs no problem the noise was followed by a smell of rotten eggs this has happened a couple of times now

Ford grand cmax 2012
27000 miles

#2

withoutpunctuationIfindyourposthardtounderstand

3 Likes
#3

Smell of rotten egg means there is something wrong with the catalytic converter.

#4

Thanks for your reply mate very helpful

#5

Thanks mate not sure to be fair not had the smell since could just be my driving style thank you for your advice

#6

It may be some kind of transmission problem. Suggest to check the fluid level as a start. If a manual transmission, could be a clutch problem. Seems unlikely to be a cat problem at 27K miles, unless you’ve had some misfiring going on for some time. Any diagnostic codes? Starting off uphill with a cold engine is hard on any car.

#7

And all this time I thought that was why vehicles had low gears. Modern vehicles only need a few seconds before they are ready for anything but 1/4 mile time trials.