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Catback exhaust weird noise


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#1 Flyman

Flyman

    Firebird Newbie

  • Full Member
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  • 37 posts
  • Gender:Male
  • First Name:Edgar
  • City:Chicago
  • State or Province:IL
  • Country:USA
  • Interests:Care and basketball
  • Year: 1994
  • Make: Pontiac
  • Model: Firebird
  • Engine: 5.7L
  • Transmission: Automatic

Posted 3 weeks ago

I have a 94 trans am GT with 64k miles. I just got my magnaflow catback exhaust installed two days ago. My car makes this weird noise when Im stopped, it doesnt idle irregularly I think it just shakes a bit more (Nothing worrisome I think) which I take its because of the catback. But I cant explain why it makes this sound. It didnt make it before the install. I also had an instance where when I wanted to accelerate its like it wouldnt go. But that only happened once. It hasnt happened to me again.

https://share.icloud...LZE-Usg#Chicago

https://share.icloud...ElmfdrQ#Chicago

https://share.icloud...w#Harlem-Foster

Ok after the last video my check engine light came on smh

#2 Injuneer

Injuneer

    Just Trying to Help

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  • Gender:Male
  • First Name:Fred
  • City:Central NJ
  • State or Province:NJ
  • Country:USA
  • Interests:Licensed Professional Engineer (Mechanical)
  • Year: 1994
  • Make: Pontiac
  • Model: Firebird Formula
  • Engine: 381ci LT1 stroker
  • Transmission: TH400 + GV O/D

Posted 3 weeks ago

Could you just post these on YouTube, or somewhere that doesn’t require us to download them from iCloud?


1994 FIREBIRD FORMULA
FRED

 
381ci all-forged stroker (Callies Stealth, Oliver billet rods, BME 2618-T61 nitrous pistons) - 10.8:1 - CNC LT4 heads/intake - Comp Cams solid roller - MoTeC M48 Pro engine management - 8 LS1 coils - 58mm TB - 74#/HR injectors - 300-shot dry nitrous - TH400 - Gear Vendors 0.78:1 O/D - Strange 12-bolt - 4.11 Pro-Street gears - AS&M headers - true duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP / 800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117 MPH straight motor
 
https://www.firebird...9_698_32777.jpg

 





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