well ive been having a prob. with my car no matter what gear im in i can only get to about 5500 or 6000 rpm before my car starts jerkin, i really have no idea why its doin it. someone please let me know what you think the prob. might be

 

boost leak possibly... check for any leaks.

 

ey buddy i had the same prob...and it turned out to be my spark plugs so go and check that out first!!! cheap things to check on first before going all out and big....but whenever you check and see if thats your prob come adn tell us if it is alrite! GOOD LUCK

 

We need more details. Is it fuel cut? Is it sputtering? Is it causing a loud whistle with a simultaneous loss in boost?

We aren't clairvoyant - we need more details than (my car starts jerkin).

1) If it's fuel cut, you need a tune.
2) If it's sputtering, you need some NGK BPR7ES plugs gapped to .026 and be sure you have stock plug wires.
3) If it's the loud whistle, then you need to fasten down your intake snorkel with both clips.

 

alright well its def. a sputtering and thats what i was told was my spark plugs so i ordered the ngk's last week and after i put them in it did not solve any problems so thats when i was like what is the prob. with this. thanx though for helpin me out im gonna spend sun. maybe seein if there is a boost leak and if it still pursists then its goin back to the dealership to have them fix it.

 

i had the same problem, i still have no idea what the problem was. changed spark plugs checked for leaks. still had the same problem i bought a 1.3 openport cable and sent my maps to AL, got a reflash and it doesn't do it anymore. maybe boost cut??

 

If you're WOT and your car suddenly jerks spastically, you're car is most likely boost spiking and hitting fuel cut. Like Warrtalon said, this can easily be cured with tuning and in a worst case scenario, porting of the wastegate part of the turbine housing.

Thanks,

Daniel