Need Help Asap Please!

[gL3nJaMiN88]

hey guys , few weeks back my turbo gave way and i didnt have much money so went to SSS and picked up some VG30DET Turbo off a Nissan Leopard some weird ass car . Everything went ok , Bought myself a Gizzmo 6 Stage Electronic Boost Controller with Overboost / Spike Correction and and Multiscramble which i installed myself and set up using a guide another user here created . Now it runs perfectly on Low boost setting which is around 7.6PSI with 30 percent Gain . As soon as i go to around 10 or 11psi Modes that i have with around 5 Percent Gain at around 4500-5500 the car makes a weird backfiring / stuttering sound under full load and i have no idea what it is . Im also running an APEXI AFC NEO which i havn't touched from the other owner set it . Does anyone have a guide or settings that they are using on a simular Setup? . Its a S2 R33 with FMIC , SARD FPR , Walbro Fuel Pump and Standard Internals?

Edited October 24, 2008 by gL3nJaMiN88

[DrewII]

coil packs? gap spark plugs 0.8mm? boost spiking and boost cut kicking in?

[R31Nismoid]

Did you try searching first? I notice your new to the forum... but your problem could be any one of a dozen things and is pretty common

http://www.skylinesaustralia.com/forums/Re...tml&hl=4500

http://www.skylinesaustralia.com/forums/Mi...tml&hl=4500

http://www.skylinesaustralia.com/forums/Ba...amp;hl=missfire

http://www.skylinesaustralia.com/forums/Ri...amp;hl=missfire

http://www.skylinesaustralia.com/forums/St...amp;hl=missfire

http://www.skylinesaustralia.com/forums/Mi...amp;hl=missfire

There is enough threads to get you started.

Im locking this as those threads cover at least the very basic to intermediate, and a lot of the things are trial/error in the process of diagnosis.

Cheers