hi again all, well, another question to a tech or who ever knows whats going on, i have this 1985 s10 pickup 1.9 4 speed truck, i just installed a whole new exhaust... when i bought it,, it had only a cat and a 12" pcs of pipe and that's it. it had a manifold exhaust leak so what i did was installed new manifold gaskets with a new donut. then i bought a new stock muffler straight to the back, all new pipe. but i did remove the cat which was in bad shape and was heavy as heck. but anyways. what i did notice is in the mornings when i take off and shift it back fires some and when its warm and i give it a bit of gas more then normal it back fires as well. enough to scare someone that is not expecting it. now can someone tell me if i have a problem? i'm thinking maybe by removing the cat , this is why i have this. or maybe not enough back pressure. anyone??? thank you.