1991 G20 hissing sound

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joshk
Posts: 2
Joined: Wed Feb 02, 2011 11:22 pm
Car: infiniti G-20

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Hey i have an all stock 1991 g20 and whenever i get the rpm's higher than 4500 it starts to hiss and loses power. I have no clue what this could be so any help would be awesome.

Thanks,
Josh

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RED_DET
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Car: 2004 Infiniti G35 Sedan 6 spd
2011 Infiniti G37x
1992 Nissan Sentra SE-R SR20DET
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Sounds like an intake leak post MAF.
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PapaSmurf2k3
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Posts: 19000
Joined: Thu Nov 21, 2002 3:20 pm
Car: 2017 Corvette, 2018 Focus ST, 1993 240sx truck KA Turbo.
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Does it only do it under load, or can you pop the hood and rev it up to 4500 to try and trace the leak?
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joshk
Posts: 2
Joined: Wed Feb 02, 2011 11:22 pm
Car: infiniti G-20

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It does it whenever the RPM's get over 4500 wheter under load or in neutral in the driveway.
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