My car is modified to stage IV (~525 HP), it has a stage II LWFW clutch. It's become very hesitant when starting to roll driven normal. It does it in 1st and 2nd gears only. When driven medium hard to hard is perfect. Is this normal ? It feels like its timing is off a bit. Can I fine tune a car like this ?
Thanks

 

It could be anything from a boost leak to a going out MAF.....
if the car is standing and idleing is it doing it too?
did this start after you installed the clutch?

 

It started just recently, the clutch and upgrade were done at the same time 1,000 miles ago. How do I check the MAF of the boost leak ?

 

When you punch the car, does the car sputter around 3-4K rpm? Seems like runs out of steam, possible MAF. Unhook the MAF and try it, if the car runs good then it is MAF. BTW, sometime the PSM/ABS sign comes on from MAF. If not then boost leak tests. GL

 

Not the MAF. Maybe boost leak. How do I check that one ?
And, is there a fine-tune for a car like this ? I had an old mustang that had the same problem many years ago and took it to a mechanic and fixed the timming on it. Maybe I can do something similar here ???

 

Have to find a good tuner and do a live Dyno custom tune, check AFR, etc. Boost leak, I think Mark maybe able to guide you better. GL