Catback exhaust weird noise - Exhaust - Firebird Nation

Jump to content is the premier Pontiac Firebird forum on the internet. Supporting Members do not see the above ads.
- - - - -

Catback exhaust weird noise

  • Please log in to reply
1 reply to this topic

#1 Flyman


    Firebird Newbie

  • Full Member
  • Pip
  • 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.




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

#2 Injuneer


    Just Trying to Help

  • Administrator
  • 13772 posts
  • 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?


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


0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users