car backfires when i upshift????

hello again, remember me…

well i’m back… and heres the problem… first off let me run down a list of things that i’ve replaced / changed out…

replaced:
clutch cable
master cylinder and booster
reverse lights
brake lights

on order:
shift stablizer bushings (if i’m in first i can rock her side to side as if she was in neutral, would that fix it or no)

needing to be replaced:
fuel filter (i have it already, it’s just a bitch to get those frikkin screws off, and i’m afraid i’m going to break it)

okay, now on to the problem…
when i’m driving the car, and this is being normal, and i let it get to about 4k, or a little over 4k the car will pop, and i noticed that i can do it in almost all the gears. Should i be worried or ??? i’m thinking it’s the exhaust that’s on the car.

i’m going to replace it so don’t worry… i hate the way it sounds… but i want to fix all the major shit first… i’ll post up pics of the entire car here soon so you guys can look at the work in progress (believe me when i saw that) and yes i’m running rich… the back of my car is black now… i asked this guy i know what it could be and he said he could be some sort of switch that turns on when you start it up and is suppose to close something so it won’t run rich… (if that made sense, i can’t remember how he said it.)

Are you using a high flow cat. If you are that could cause that type of noise.

is there a check engine light? you should check ur oxygen sensor too if ur running that rich to back fire then theres a good chance that ur sensor went bad.

things i would be looking for would be check ur o2 and ect, then make sure u dont have an exhaust leak b4 ur o2 sensor. then check ur fuel pressure make sure ur injectors arent leaking. check ur spark plugs and wires cuz that can cause it too.

if u dont get this problem fixed u will need a new cat very soon.

for now thos are the things i would check.

hoped that helped some
peace

actually the check engine light is on… i forgot to mention that… so it maybe my oxygen sensor. i’ll replace it tomorrow… thanks lude