Issues after installing HKS actuator

[zaffydoo]

Hi guys. Got myself a new HKS actuator past week. Installed it as per to the given instructions. Set it to 123mm (0.8 bar) below fuel cut. Car boosts at 9psi 1st gear. 2nd gear 10-11psi but around 6k rpm the car just lets go for a split second feels like hitting the rev limiter once. Happens on third gear as well. Doesn't feel like fuel cut as it doesn't seem violent as most members here posted about the feeling of fuel cut (Hitting a brick wall). I lowered the boost by two turns on the actuator. Boosts less but now same happens from 3rd gear around top end of the rev range.

95 Starlet GT Turbo 4E-FTE
Sard BOV
K&N air filter
Decat
Denso IK20 spark plugs/but gapped it at 0.8mm today still the same.

Any help will be much much appreciated

[akyakapotter]

I'd say your wastegate is cracked they all do it. 

[zaffydoo]

1 hour ago, akyakapotter said:

I'd say your wastegate is cracked they all do it. 

Thanks for the reply bud. What's the possibly solution? I'm fairly new to this

 

 

[Gainzy]

Grade 8 NGK Iridium spark plugs with some new NGK ht leads, check the dizzy cap pins see how worn they are too, set your hks actuator to stock boost for now it should still hold boost better than the old actuator spring. Grab yourself a decent new electronic boost controller HKS or Greddy Blitz etc you will have better control over your boost.

[zaffydoo]

Hey guys great news! Changed the plugs to NGK BKR7EIX (Heat range 7). The problem is solved and holding boost well around 11.5-12PSI in 3rd gear. Next on the list is the GReddy Profec OLED boost controller. Can I use the EBC to get 12.5PSI stable throughout all the gears?