[diesel88]

My mustang starts up perfect but when i put it into reverse or drive it revs up to 1500 rpm and then back down to 800 to 900 rpm. but if i go to mash the peddle down it starts to sputter really bad and slowly start to go. i have changed then coil pack, plugs, wires, air filter and mass air flow sensor and still the same problem. but i smell a weird burning type of smell when i get out of my car that seems like its coming from my cats, could my cats be clogged? should i gut them and see what happens then? please help i have only had this car for about 2 months and have had nothing but problems, its a 2002


thanks

joey

[GreenFaleen]

fouled cats= bad 02 sensors, they that and clean your IAC also check for a vacuum leak

[diesel88]

no check engine light was on, i checked it anyways but no codes poped up. i can attempt to try to get new o2 sensors and see if that works, is there any way to test them to see if there bad? How do i check for vacum leak? whats a IAC and wheres that located?

[GreenFaleen]

idk of a way to check them usually they will smell like gas if they are bad but they dont always throw a code when they are failing,

what year is your car?

[diesel88]

2002