exhaust question

haha....god i hate this stupid dynomax super turbo muffler even more so now.....my question is at low rpms, between 1600 and 1900 the exhaust has started whistling....at any other rpms i can hear the exhaust and thats good but when the whistling starts the sound of the exhaust cuts out and whistling is all that can be heard....i checked the muffler and there is no hole, its not that kind of sound because i have had a hole in a muffler before and i cant find any exhaust leak....it just started doing this a couple days ago after having the muffler on for a couple months....any ideas what to look for? any help would be great! its driving me crazy!!

the catalytic converter could be clogged..

i had been noticing that rotten egg smell sometimes like when a cat goes bad...but would one go bad at 75k? thanks!

i know its probably been asked 100k times....but how do you check the cat?

Go see Bubbrubb and see if it goes "Woooo wooooo!" :lol2:

I think you just hit it with a hammer and see if anything rattles.

i was told you can take a hammer or screw driver and make a small hole and let all those beads out and that will be a temporary fix til i get time to fix it and put a straight pipe on it....any input on this? thanks!

If you put a hole in it to do that make sure to weld it back up or it will sound like crap.

kinda changing the subject....my uncle drove my car and said it sounds like the rear end is doing the whining because everything with the exhaust seems okay....how can you check the rear end? if it is going bad to change it can you change the gears in it or do you need to swap the whole rear end? thanks for the help!

usually that means the differential is going bad, perfet time to upgrade to a limited slip and 4.10s :D

usually that means the differential is going bad, perfet time to upgrade to a limited slip and 4.10s :D

i would like to upgrade to atleast 3.73's....with the differential going bad means that i would need to swap in a whole new rear end?

No, you can just hve a new diff/gears installed

alright....i've been looking around and i could find the gears but not the whole rear end assembly... thanks!

you sure your fuel pump isn't wining........sometimes the gm fuel pumps like to wine and other times they wine when they are goin bad..... just a suggestion

you sure your fuel pump isn't wining........sometimes the gm fuel pumps like to wine and other times they wine when they are goin bad..... just a suggestion

im pretty sure its not the fuel pump...it seems okay....im thinking rear end or maybe wheel bearings because for a long time i could go around a real sharp turn and stomp it and i could hear something whining that i assumed was the rear end but now its got to where it does it all the time at low rpms and so loud at first i thought it might have been the exhaust which i dont think its that now....but thanks for the help....how would you check a fuel pump to see if its going bad?

im pretty sure its not the fuel pump...it seems okay....im thinking rear end or maybe wheel bearings because for a long time i could go around a real sharp turn and stomp it and i could hear something whining that i assumed was the rear end but now its got to where it does it all the time at low rpms and so loud at first i thought it might have been the exhaust which i dont think its that now....but thanks for the help....how would you check a fuel pump to see if its going bad?
Are yu sure its coming out of the rear?

Are yu sure its coming out of the rear?

yeah im certain that its coming from the rear....its loud when it does it, i can hear it over the radio

well....i shouldnt say im certain....but its almost positive....for a long time i thought it was the rear end when it was quiet....i had 2 of my uncles drive it and they both seem to think it is the rear end and it sounds like its coming from that area......do you have another idea to check out? its driving me insane!

check: hole in the muffler, dying cat, fuel pump PSI, change the fluid in the rear...

check: hole in the muffler, dying cat, fuel pump PSI, change the fluid in the rear...

its not a hole in the muffler sound ive had that before, its not the fuel pump im certain, im pretty sure its not the cat...and lastly wheres the drain plug in the rear end to drain it? me and my cousin looked but didnt see it...im sure i over looked it....thanks!