Hey yall. I've been searching usmb all day as my dad and I try to figure this out. I'm having severe backfiring issues. (87 GL sedan) My muffler's got a hole blown out and from the looks of things my y-pipe cat is rusted to ************. If I bypass the cat and make sure all the leaks in my exhaust system are plugged, will it still backfire? I'm pretty sure my carb is tuned decent. I'm idling at about 900-1100 rpm. I don't have to pass emissions since I live in the BC interior. I'm about to move to Ucluelet, near Tofino on Vancouver Island and I need to get this backfiring issue fixed before leaving(2 days). I just need to know if, by gutting my cat and piecing in a pipe, there will be a lack of backpressure which would result in more gunshot backfiring.
Just a little more info on the BF, it tends to bf hard when I let up on the gas when shifting gears, 3000 and higher rpms really scare the ************ outta people.
edit: btw I have a welder and a dogged determination to not spend money since I won't be able to afford food....if I can't fix my muffler by the time I head out then I'll just wait until i can afford a new one.
Help me turn my rusted out hunk into a surfmobile!