i wanna blow it up

so my 2000 chevy s10 the 6 cylinder is acting really fu*kin weird. when i start it is studders then when i step on the gas it studders more and makes an odd thumping sound like an out or round tire. what in the world could this be? i was thinking fuel filter but before i go rippin it apart whats everyones elses input?

Edited: 8/21/2008 11:08:07 PM by bobogolfcart

have you changed or replaced any parts recently? its not odd to have a brand new part not work or go bad cus i had a 93 s-10 2.8 v6 that the starter was back feeding some how and it was causing my truck to sputter run rough and crank and crank but not start. sometimes its the obvious stuff that you over look

nope nothings been changed but im near 140k so maybe its my catalytic converter? i dont know im stumped and i dont wanna drive it and mess it up more. its like its not getting gas or im running out almost its frustrating.

My old truck did that once so I changed the fuel filter and it was fine. Hope you get it fixed! Little things like that always makes me mad too

ive been reading up about the cat and i think it may be that but how do you test it? im gonna replace my fuel filter tommorow but how do i test the cat?

Has it had a tune up latley? My girlfirned honda did the same thing so I did a tune up and changed the fuel filter and the problem was fixed.

well it ended up being a completly clogged fuel injector :/ $300 later and itll be driveable. Thanks for all the input tho guys.

We use to test cats by checking back pressure...by drilling a whole in front of the cat and behind, they make a guage that goes in the hole and you monitor the pressure in front then behind if the # in front is alot higher chances are you have a bad cat. Any muffler shop should have this setup.