Werd Sr boost Problems - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

harangatang · 01-11-2008, 11:03 AM

So.. I searched, but I didnt really see anything close to this so

Ok, on stock boost, ~7-8 psi, its fine all day. Hits 8psi, whatever
If I turn it up to ~10-11, it will hit full boost once then it won't go over like 1-2 psi. If I turn the car off, leave the boost controller alone, turn it back on, it will hit 10-11 psi once, then not go over 1-2psi again.. Even at 3/4 throttle.
If I turn it back down to 7-8psi, its fine all day..

So, I really have no idea what the cause of this could be.. bad boost controller (I have a HKS manual), bad wastegate, electronic issues...

Help me out guys!

IStop4NoMan · 01-11-2008, 11:31 AM

I would take a guess and say your wastegate is getting stuck open after you hit the higher boost? maybe a new actuator is in store for you.

01-11-2008, 11:03 AM	#1
harangatang Zilvia Addict Join Date: Apr 2007 Location: Dallas, Texas Age: 35 Posts: 931 Trader Rating: (9) Feedback Score: 9 reviews	Weird Sr boost Problems So.. I searched, but I didnt really see anything close to this so Ok, on stock boost, ~7-8 psi, its fine all day. Hits 8psi, whatever If I turn it up to ~10-11, it will hit full boost once then it won't go over like 1-2 psi. If I turn the car off, leave the boost controller alone, turn it back on, it will hit 10-11 psi once, then not go over 1-2psi again.. Even at 3/4 throttle. If I turn it back down to 7-8psi, its fine all day.. So, I really have no idea what the cause of this could be.. bad boost controller (I have a HKS manual), bad wastegate, electronic issues... Help me out guys!

01-11-2008, 11:31 AM	#2
IStop4NoMan Zilvia Junkie Join Date: Mar 2006 Location: so cal Posts: 310 Trader Rating: (13) Feedback Score: 13 reviews	I would take a guess and say your wastegate is getting stuck open after you hit the higher boost? maybe a new actuator is in store for you.