While driving my Fiesta on the motorway I noticed that at around 3000rpm/70mph that if I release my foot off of the accelerator completely (I just let the current momentum propel me forward) the following happens after about 2 seconds:
- The engine feels like it suddenly grips something. The same sort of feeling when it engages with different gears.
- A loud deep hum noise kicks in for the duration my foot is off of the accelerator.
When I put my foot back on the accelerator everything goes back to normal.
Was wondering if anyone had any idea what it could be?
- The clutch is riding quite high with about 1-2 inches of clearance when it engages.
Just some further information from comments on the car:
The car is a 1.2 L Ford Fiesta Mk6 Zetec 2006 UK Model.
I don't do much motorway driving so I am not sure if this is new or not. I only get a sound 2 seconds after I have let go of the accelerator. At the time I am doing nothing to the clutch.
The clutch is still firm on depression with no noises or spongey-ness. The clutch isn't slipping either
I think the sudden grip could be engine breaking but the deep hum is so loud it doesn't sound like it should be there.
The exhaust has recently been fully changed by a local garage who are very good.