I was driving and all of a sudden i hear a noise thats sounds like my muffler fell off, i still have power,

The shield on the catylist converter

95% sure its your heat shield over your muffler, other causes could be, shocks or struts, exhaust system or muffler loose.

Check your cattalic convert inside comb have come loose if so need to replace the unit and check muffler for noise matterial from convertor may also gone into muffler but maybe its only muffler or maybe only convertor. Another posibility check A/c clutch assembly maybe is coming apart or sloppy and likes to ring bells sound like.Turn on Ac if you have if the nosie is gone then you need a clutch assembly for your AC


Joe

in all honesty havent a clue without a drive ,sorry

for 15 minutes no problem but fix it the soon you can if not you can burn the o2 sensors

Hi there.
It sounds like the baffel plates in the muffler which is a common thing on all cars sooner than later ,and the answer to it is get under the car and just bang the muffler with your hand and if a noise is there get it repaired or replaced OTHER WISE if not there go ot the coverter the other sort of muffler towards the front and do the same to that ,as will be your problem.
Ron

I think that mechanic is stealing your money

The noise surely comes from some engine mount , or exhaust system

[email protected] , @mecanicasesoria

It sounds like you may have an exhaust leak...possible hole in your muffler....take a look!

Your getting backfires? hmm interesting. Seems like your engine is getting flooded and either purging it out of the exhaust or burning it all at once or both (backfire). Sounds like a leaky engine valve to me.There again the bluish smoke indicates to me thatyou are leaking oil somewhere- bad rings or head gasket maybe, which could cause a loss of compression which could also cause your problems.That rattling from the left/rear side sounds like a bad muffler try kicking the muffler (not hard though) next time you walk by it.

did u check the catalyst is it loose inside..see how much back pressure from the exhaust u r getting