Sputtering on boost.. need help.

[Gabe1103]

need help guys...

the car just started sputtering when hitting boost...normal acceleration is fine though... what could it be?

** i checked the coil wires for damage but i dont see any damage.
** i checked the plugs, its running 'Bosch +5 HR7DC' - not sure if this is the right plugs to run for my setup (previous owner installed it)
** could this be vac/boost leak?

thanks!

E30 M30B35 GT3582r topmount Tial 44mm wastegate Tial 50mm bov 3" straight exhaust

[ak-]

What engine management are you using and is that itself tuned for you to be allowed to go into boost safely?
Could be spark plug gap.

[Gabe1103]

What engine management are you using and is that itself tuned for you to be allowed to go into boost safely?
Could be spark plug gap.

using MSPNP and yes, street tuned enough to go boosting... havent checked plug gaps... what plugs would you recommend??

[Gabe1103]

Thanks! found the culprit! 2 foul plugs and a small hole in the vacuum hose to the wastegate.

cheers! lets boost!

[ak-]

Whoa, that hole in the wastegate can cost you an engine lol.

But nice! Happy boosting.