Excessive Revs

HI, so just bought my first Jimny (57 plate 1.3l manual) and having a little trouble with it over revving at times.  When going uphill from time to time and you give it some quick acceleration the rev counter increases and it sounds like you are riding the clutch.  When this happens and you take off a little acceleration it corrects itself.  When you change gear and only gently start to accelerate it doesn’t seem to happen it only happens when you push it quickly.  Is this typically a Jimny quirk or could it be an underlying issues ?  Thanks.

It sounds like the clutch is slipping at high revs, which is usually a sign of a worn out clutch plate.

Is the clutch cable or hydraulic operated? Either way if something is sticking and partly disengaging the clutch you would get the same thing.

A slipping clutch will only get worse, you might be able to smell it burning the material off the plate and I would avoid it happening until you can get it fixed.

Robin

Like Dr. Robin, I think you have a slipping clutch.

Find a quiet piece of road and accelerate gently through the gears until you are doing a reasonable speed, maybe 40 mph (60 km/h) in fourth gear and then step firmly on the accelerator, you should see both the road speed and the engine rpm increase gradually, and as if synchronized, if the rpms are climbing out of sync with the road speed, the clutch is slipping.

Next, quickly fully depress the clutch all the way to the floor & release it, you should see the rpm jump and then drop, if the drop is gradual, the clutch is slipping.

Like the previous answers, the clutch is slipping.

It is a cable on the gen 3 and as it wears the free play disappears and it will start to slip.

So first port of call is cable adjustment. (Make suitable offerings to your Deity of choice that this is all it is)
Inside the car, you should be able to press the pedal about 1/2" before you feel any resistance (use your hand) Basically you should be able to rattle it 1/2" If you can't time to adjust the cable

Underneath the car on the drivers side there is a plastic box covering the cable end.
Sticking out is a corroded aluminium tube, with a big plastic nut against the gearbox.
You need to turn the plastic nut to wind it towards the clutch pedal (along the corroded bit) until there is free play at the pedal.

(If you flip the cover off, you can unhook the cable and pull it out, then get the wirebrush and WD40 to the corroded threads.)

If there is free play at the pedal and the clutch still slips, time to get your wallet out and get a new clutch fitted I'm afraid.

As it is an early R72 gearbox on a 2007, while it is out you might as well put a bearing kit into it (even more £££)