|02-01-2004, 12:44 AM||#1|
Join Date: Oct 2003
Location: Va.Beach/school at RadfordVehicle:
2003 impreza wrx
Knock At Low Boost...help
OKAY GUYS, HERE ARE MODS.....INTAKE,UP PIPE, TURBOBACK EXHAUST WITH NO CATS, AND UTEC STG2 MAP.
HERES THE PROBLEMS, 2 WERE RESOLVED TONIGHT
1. INCONSISTENT IDLE
2. between 4-5k rpms and 20-40% throttle the car begins to sputter and some times results in the car to jump back and forth. after logging it i noticed the injector duty was jumping from 20-40% to 70% and back down in the matter of split seconds.
THESE PROBLEMS FIXED BY THE REMOVAL OF MY MAF SENSOR
3. heres the big problem.......its really cold outside and yet i cant run more than 14 psi without knock. turbo xs said that with my mods i should be running 16.5-17 psi. my friend is running the exact same setup and is peaking at 18.5psi. what the heck is going on??
right now ive turned the boost down to 12 psi and still see knock after full aceleration thru 1st and 2nd gear and let off the throttle right after my shift into 3rd. so its still knocking right as i back off the throttle in the begining of 3rd.
i have not altered the fuel/timing map since i uploaded it from TXS.
and why cant i get full boost in all gears?? would adding a MBC that totally bypasses the use of the stock solenoid help me out?
if your still reading this thank you for staying with me through all this typing, hahaha. if u can help me out any itd be awesome, thanks!!!!
|Thread||Thread Starter||Forum||Replies||Last Post|
|knock at low load?||austria impreza||Engine Management & Tuning||9||10-10-2009 02:25 PM|
|Engine knock at low RPM's||rek888v2||Factory 2.5L Turbo Powertrain||12||01-02-2006 10:30 AM|
|Steering column knock at low speeds||Jitenshakun||Canada Region Forum||10||01-14-2005 10:03 AM|
|Knock at low rpm and throttle||PharmCo||Factory 2.0L Turbo Powertrain||4||02-02-2004 10:28 PM|
|Knock At Low Boost....help||SmoknWRX||Factory 2.0L Turbo Powertrain||9||02-01-2004 07:23 PM|