ONLY when the engine is cold... if i rev it... it makes a disgusting back-fire popping noise on the up and down of the rev... i have stock exhaust with cat and a flowmaster 80 series muffler... did i burn a valve? need sparkplugs?

 

popping is normal when your car is cold...cold exhaust pipes mixing with warm exhaust air makes the popping noise. oh yeah, quit beating on your car when it's warm, it'll last longer.

 

whew.... lol i run the **** outta that thing.... another question im on my third tranny mount... whats up with that?

 

Number one you should never be reving a cold engine! The colder an engine is, the richer the mixture the PCM feeds to it. It's not at all unusual to have some "popping" from the exhaust on a cold engine when trying to coax it into doing so. A free flowing exhaust is more likely to do this, however ignition problems and the like may also contribute. You certainly did not burn a valve. If all else seems well and the "popping" isn't unreasonable I wouldn't be too worried. It has never done this before at similar temps?

 

If your on your 3rd tranny mount my advice would be cut back on the "drive it like you stole it" technique. Be easy on it until its time to put it to the floor. I learned the hard way too.

 

i don't know about the before in the similair temps thing... i had the flowmaster put on in sept. and this started after the freezing connecticut weather hit... i disocvered it by accident... car was in park warming up (ideling) and when i got it my foot pressed on the gas...

 

Broken tranny mounts are a typical problem with these cars. Poly tranny mounts are almost indestructible but do allow more noise into the interior. Many people have had better luck with 1LE mounts, although I believe GM has only one part number now for the mounts. I think these new mounts are similar to the 1LE piece, maybe someone can clarify?

 

from the sound of it you're going to be on your second engine soon.

 

im getting tired of people telling me to go easy on it... hey if i brake it i'll fix it... but as i tell them, i didn't get 300 horsepower to start up slowly =] drive it like you stole it -lol nothing could decribe it better still haven't gotten a speeding ticket tho... my record - hartford ct - Scranton Pa. 1 hour 8 minutes

 

"Popping" is the hallmark for a Flowmaster muffler, especially a cold one. I wouldn't worry. Wait until you a have a big cam and full exhaust to hear what popping really sounds like

 

i thought we were all gearheads in here... ya know 2 strips at the green light... ***** to the wall bury the needle etc etc etc.... you are all telling me to go easy on my car... isn't this why we bought f-bodies? to go quick?

 

we all are gearheads and enjoy the power....but with restraint. most of us don't beat the **** out of our cars, especially trying to set records on highways. not only do you put yourself in danger but you put others at risk.

 

it was 3 oclock in the morning and the highways outside of newburgh are like nevada

 

and that makes it okay. read this
http://espn.go.com/nfl/news/2003/0115/1493297.html

 

Many people here are responsible and leave it to the track... others are crazier than you. For the sake of others just use some judgement about when and where you decide to be a bit rambunctous. I'm starting to sound like an old fart

This is quickly becoming lounge material. Lets not start a flame war, this is LT1Tech. Now I'm starting to sound like a mod