ive noticed on my scoob that wen its boosting it seems to be shuddering and hesitating a little but it does seem to fully boost but not as smooth as it should. has anyone got any ideas? cheerz jay

 

i also have this problem still cant solve it...

 

sounds like it's misfiring. If it's on older car with individual coil packs they often degrade over time. You can try some new plugs, gapped at 0.7 or even 0.6mm. Maybe even gapping down your existing plugs will help. If it does help you are likely to need a set of new coil packs for best results.

Paul

 

cheers mate. my car is a 2000 model so dont think its got individual coil packs. ill try chaging the plugs and setting the gaps then.