Extreme loss of power at 7100 rpm. Help needed!

Zat_Zuma · 01-28-2012, 09:25 PM

Is your transmission or torque convertor shot?
I assume you have a automatic transmission.

+ or - 0.5 volts on your MAF air flow is a huge difference. Expecially with the 3" intake piping. Plus if your boost is low, I would automatically be looking for a boost/vacumn leak in your couplings/connections or the boost relief valve could be sticking.

kosstick · 01-28-2012, 10:01 PM

Quote:

Originally Posted by Zat_Zuma

Is your transmission or torque convertor shot?
I assume you have a automatic transmission.

+ or - 0.5 volts on your MAF air flow is a huge difference. Expecially with the 3" intake piping. Plus if your boost is low, I would automatically be looking for a boost/vacumn leak in your couplings/connections or the boost relief valve could be sticking.

I doubt my trannys shot it shifts fine and no matter what hp or gear pull its always 7100 rpm. No matter if it's 350 who or 410 or 390 or 450

Anyway I'm confident in gtm uprev and my tuner. Im just hoping I can make this problem go away quicker

Mkai0 · 01-29-2012, 07:08 AM

I'd have to agree with with what Zat Zuma is saying about checking for boost leaks. I've already had to retighten some of my couplers on my GTM Stage 1 kit. What kind of AFR's #'s are you getting?

awkwardturtle · 01-29-2012, 07:21 AM

I know of a guy on another car platform that had a very similar problem - supercharged setup, in the upper revs power just dropped off for no obvious reason. Turned out a plastic section of his intake was bending shut from the pressure at the upper RPMs, closing off the intake somewhat. I doubt that's your problem, but it's another thing to look for. Sounds like it has to be some sort of mechanical problem because anything tune-related that would cause that seems like it'd be fairly obvious to the tuner.

kosstick · 01-30-2012, 09:28 AM

Quote:

Originally Posted by awkwardturtle

I know of a guy on another car platform that had a very similar problem - supercharged setup, in the upper revs power just dropped off for no obvious reason. Turned out a plastic section of his intake was bending shut from the pressure at the upper RPMs, closing off the intake somewhat. I doubt that's your problem, but it's another thing to look for. Sounds like it has to be some sort of mechanical problem because anything tune-related that would cause that seems like it'd be fairly obvious to the tuner.

Hmm, that is very interesting, only reason I think it is software related is that it always happen 7100 rpm..Like the train is NEVER Late lol.

01-28-2012, 09:25 PM	#1 (permalink)
Zat_Zuma A True Z Fanatic Join Date: Nov 2008 Location: Edmonton, Alberta ...eh Posts: 1,171 Drives: 2017 Touring auto Rep Power: 20	Is your transmission or torque convertor shot? I assume you have a automatic transmission. + or - 0.5 volts on your MAF air flow is a huge difference. Expecially with the 3" intake piping. Plus if your boost is low, I would automatically be looking for a boost/vacumn leak in your couplings/connections or the boost relief valve could be sticking. __________________ [B]2009 & 2017 370Z Touring Sport Autos SOLD

01-29-2012, 07:08 AM	#3 (permalink)
Mkai0 Base Member Join Date: Dec 2010 Location: Somewhere in Texas Posts: 209 Drives: 2008 G35 Sedan Rep Power: 16	I'd have to agree with with what Zat Zuma is saying about checking for boost leaks. I've already had to retighten some of my couplers on my GTM Stage 1 kit. What kind of AFR's #'s are you getting? __________________ Eibach, Tanabe, Blitz, Vertini, GTM stage 1.5 SC, Aquamist, Invidia, Alto built 5AT, Edge Racing, Racelogic, GTM driveshaft, 440 whp in 101F TX heat..

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01-29-2012, 07:21 AM	#4 (permalink)
awkwardturtle Base Member Join Date: Nov 2011 Location: minnesota Posts: 98 Drives: 07 Civic SI Rep Power: 15	I know of a guy on another car platform that had a very similar problem - supercharged setup, in the upper revs power just dropped off for no obvious reason. Turned out a plastic section of his intake was bending shut from the pressure at the upper RPMs, closing off the intake somewhat. I doubt that's your problem, but it's another thing to look for. Sounds like it has to be some sort of mechanical problem because anything tune-related that would cause that seems like it'd be fairly obvious to the tuner.