Not building boost - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

1eightySX · 06-22-2007, 10:13 PM

I wish I had more to contribute to this forum but it would seem the only time I write is when I have a problem. Which brings me to my next point, I have a 91 180sx (redtop Sr). I have been having a problem that it is not going past 4000 rpm as well it stops builing boost at about 1.8 hkpa. Allow me to explain my situation, last night I was dry fitting my pipping for a front mount intercooler. In doing so I disconnect the pipe running from the throttle and of course re-connected it. Today I was driving and my car would not boost past the 4.5 hkpa, this seemed strange as it usally boosts at 5.3 hkpa. So while trying to diagnose the problem i was playing with the boost controller but much to my dismay it would not go over 4.5 hkpa. When i stopped the car I re adjusted the pipe runing from the throttle and tightened down so more. For the next two minutes my car ran perfect but seeing as how I had been playing with the boost contoller it was boosting higher than usual. I heard a pop while driving and then my car it began to lag. I heard the pop at 6.2 hkpa but i don't know where it came from. Now I know it is not safe to boost over 7 psi in a stock sr20det but I have upgraded my fuel pump, but with all that being said, did I somehow blow my turbo? Would a turbo still build a little boost if blown or is this a whole differnt problem?

06-22-2007, 10:13 PM	#1
1eightySX Leaky Injector Join Date: Sep 2006 Location: canada Posts: 100 Trader Rating: (0) Feedback Score: 0 reviews	Not building boost I wish I had more to contribute to this forum but it would seem the only time I write is when I have a problem. Which brings me to my next point, I have a 91 180sx (redtop Sr). I have been having a problem that it is not going past 4000 rpm as well it stops builing boost at about 1.8 hkpa. Allow me to explain my situation, last night I was dry fitting my pipping for a front mount intercooler. In doing so I disconnect the pipe running from the throttle and of course re-connected it. Today I was driving and my car would not boost past the 4.5 hkpa, this seemed strange as it usally boosts at 5.3 hkpa. So while trying to diagnose the problem i was playing with the boost controller but much to my dismay it would not go over 4.5 hkpa. When i stopped the car I re adjusted the pipe runing from the throttle and tightened down so more. For the next two minutes my car ran perfect but seeing as how I had been playing with the boost contoller it was boosting higher than usual. I heard a pop while driving and then my car it began to lag. I heard the pop at 6.2 hkpa but i don't know where it came from. Now I know it is not safe to boost over 7 psi in a stock sr20det but I have upgraded my fuel pump, but with all that being said, did I somehow blow my turbo? Would a turbo still build a little boost if blown or is this a whole differnt problem?