sr20det missing in boost - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

wild streak · 09-29-2013, 04:15 PM

I have built sr20det redtop with gt30r turbo 24lbs of boost on AEM engine management, it has been doing good for over a year but, the other day I had it on the dyno and did a test launch it boosted 1st and 2nd fine but it was spinning shifted to 3rd and it bogged down but as it came back up in rpm it had a weird misfire while in boost and now I cant figure out what it is. the car runs and drives perfect just in boost it has that slight miss and has no power it doesnt even have half the power it did before, it will still build full boost just has no power. My afr's are good I changed the fuel pump, coil packs, compression test it was perfect, checked timing, checked fuel pressure it was all good Im kinda puzzled. Wondering what else could cause this problem while in boost? Ill post the video from the test launch to show you when it started doing this and the way it sounds listen as it builds boost in third.

Fast forward it about 49 seconds to get right to the launch
sr20det Dyno Launch - YouTube

09-29-2013, 04:15 PM	#1
wild streak Leaky Injector Join Date: Mar 2009 Location: NC Posts: 97 Trader Rating: (0) Feedback Score: 0 reviews	sr20det missing in boost I have built sr20det redtop with gt30r turbo 24lbs of boost on AEM engine management, it has been doing good for over a year but, the other day I had it on the dyno and did a test launch it boosted 1st and 2nd fine but it was spinning shifted to 3rd and it bogged down but as it came back up in rpm it had a weird misfire while in boost and now I cant figure out what it is. the car runs and drives perfect just in boost it has that slight miss and has no power it doesnt even have half the power it did before, it will still build full boost just has no power. My afr's are good I changed the fuel pump, coil packs, compression test it was perfect, checked timing, checked fuel pressure it was all good Im kinda puzzled. Wondering what else could cause this problem while in boost? Ill post the video from the test launch to show you when it started doing this and the way it sounds listen as it builds boost in third. Fast forward it about 49 seconds to get right to the launch sr20det Dyno Launch - YouTube