Paul1212

I have a 99 Mustang GT 4.6 and I have a Mac O/R H-Pipe with a Mac Cat back. Whenever I take of slow and Im in about 2000-3000 RPM's my exhaust sounds like its spitting itself out. It does not sound like its smooth flowing loud throaty sound like I wanted. Im thinking of switching out the exhaust to a Maganflow b/c im thinking there just not working well together! Anyone have the same problems??? Can anyone tell me whats up with this crap? Thanks, Paul

sprostang

That combo should sound pretty good. Can you post a sound clip?

eventer289

maybe you are misfiring

HaV

Catted or not?
If its not catted what did you do with your 02 sensors? My bet is its running pig rich..

stangc83

if its spitting it is most likely a leak first. check that. look under the car and see if you hae any exhaust leaks AKA black spots on the pipes. after that then chech the others. the spitting sound is most likely the leak.

Hash06

my car did the same thing and i fixed the leak, sounds great know

Paul1212

Its not catted thats what O/R means and Ill chck all the bolts but its not the ticking noise I had when I had a leak up at the header manifold. Its more like a spiting sound out the back of the exhaust... and its only when i go slow in low RPMs other wise if I haul *** It sounds mean. Its only in lower RPMS!!! Help though its pissing me off.!!! Thanks again, Paul

laserred38

sounds like it is missing...how many miles?...have you replaced the plugs?...my dad's F150 was doing something similar a couple months ago and it happened to be a bad plug...the truck only has like 35k miles on it but it is a 98 and it isn't driven that far/often so just the age can make them go bad as sometimes crud builds up and doesn't get burned off...anyway...it was missing downlow also and when you got out of the RPM range it smoothed out...so we had the plugs and wires changed and problem went away

2000GT4.6

Theres your problem, you put something on your car with the words "mac" in the title.

1BAD3V

So thats why my car sounds like sh*t, LOL. Ever since I added the Mac o/r h-pipe to my 1 chambered Flowmasters, I have like a spitting/sputtering sound coming from the exhaust. It sounds like sh*t, but only sounds this way at lower rpms, like in between 2000-3000. It sounds awesome when in park and reving, but in drive and driving, sounds like sh*t. Is there a reason why it would sound good while in park, but like sh*t in drive?