anyone have any personal experiences with the "JOM" or "SUPERSPORT" coilovers,

my mk3's check engine light was on and i recently decided to see what codes it was throwing, i got MAF sensor, Cam angle sensor/cam any ideas?, i havnt had time to look more into it due to work, but somtimes the car does feel like it has no torqe and hesitats to go for a few secs when im in first then just takes of like the clutch just fully engaged, somtimes its doesnt do this and runs great and has power....well for a 2.0 anyway any input?

btw it is not the clutch sliping, more of a timming to retarded feeling

thanks for any response