I've bin having a problem with my car for a while which im most certain im close to fixing. ok well sometimes my car makes a rattling noise and sometimes it doesnt respond the way it should. I recently got my cats replaced, egr, maf sensor, smog pump to try to fix these problems but still not at 100%. Some times it responds good but sometimes it doesnt which gets anoying sometimes. I dont understand why i continue to have these problems if i put in all those new parts. I got it scanned and the only code it gets is egr valve but ive already replaced it so i dont know what i could be. Hope you guys can help me out so i can stop throwing away money and maybe i can save up some money for upgrades and some new paint LOL . Hopefully the pony will be up and running like new with all your help