o4 mini cooper hesitating please help..

[Nicolelove0531]

Can anyone help me with this i would highly appreciate it. I am having an issue with my mini cooper what is happening is when i press the gas pedal it jerks and feels like it is hesitaing also it does it when i am at a normal speed as well.but the thing is it only does in maybe 3 or 4 times and then stops.it used to only do it once in a while n now it seems like it does it quite more often does anyone know what this issue could be if anyone does please let me know

thank you.

[mab01uk]

Manual or automatic transmission?

[Sejanus]

Does it do it at all speeds or just very low ones (say 8-10 mph)?

[srtoad4]

Hesitation can be caused due to a number of different things. O2 sensor, spark plugs, spark plug wires..is the check engine light on?

[Nicolelove0531]

well it does it when i go like 5-10 miles per hour and it does it as well when i do like 40-50.too i have an appt at a bmw dealership for them to look at but i just dont no if it could be somthing simple.thats why i wrote on here to see if anyone can help me

[Nicolelove0531]

its an automatic.and no lights pop on at all thats the thing. its weird.

[Sejanus]

2004 MINIs have a CVT not an automatic transmission and they are prone to doing what you describe at low speeds. I can't recall of hearing of one doing at 40-50 mph, but I suppose it could be the same problem. The fix for doing it at low speeds is an adjustment to the transmission's software. It doesn't always make the problem go away completely, but usually at least lessens it. Taking it in to the dealer is pretty much the only thing you can do, but if it is the software issue it isn't a big deal.

[mab01uk]

If it is related to the automatic cvt transmission control module sometimes a reset of the 'computer brain' helps......do this by disconnecting the battery for half an hour. Also check the battery is giving full power under load, an original 04 battery could be starting to fail even though it can still start the engine.

[Acallahan]

Wonder if the OP could be referring to the "yo-yo" effect caused by a weak spring in the bypass valve ? $125 Detroit Tuned BPV could be the fix.