ForeverGSX
Probationary Member
- 14
- 0
- Aug 31, 2018
-
Salt Lake City,
Utah
1G GSX.. so I've used the search and read alot about people having this sputter issue under boost. my problem is this. I bought the car already modded, dude said it was big turbo and he threw the stock back on at stock boost 8psi. (no boost controller or boost gauge) so it boosts fine at stock level and a/fs are right around 11.5 - 11.8 full throttle but feels EXTREMELY slow. so i tightened up all the intercooler couplers and intake couplers, suddenly feels quicker BUT im getting the sputter almost instantly sometimes around 3500rpm. so I gap the plugs to .28 (NGKbr6es) bought new Accel 300+ plug wires, cleaned my IAC valve (nothing to do with it but someone mentioned it so I cleaned it cuz it was free) also bought a hpe boost controller and turned it up a bit, sputters hardcore still, turn it to stock boost, slight sputter but again slow as crap!! if I turn it up even a hair it sputters like no other but I can feel it wants to pull before that. havent messed with my coil pack but I want to try everything else first. would a boost leak that im missing cause this? also it needs new gaskets at the cat would an exhaust leak have anything to do with it? im stumped and super disappointed. *EDIT* I should add that the car has a/c delete, egr delete, abs delete, timing chain delete. car is basically fully modded besides the 14b turbo, tuned on a big turbo supposedly but the a/fs are right on at stock boost and when I turn it up.
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