ekVic214

i hvae a 96 hatch with a obd1 b18 swap. I barely finished up the swap and when im driving after a while i start to smell this weird fume. idk where its coming from? I can smell it alot too when i get on it a lil it. my piping is on and connected and all thta. Anybody have any ideas what it can be?

grumblemarc

iTrader: (4)

Maybe if you could tell us what it smells like. Gas? Exhaust? Rotten eggs? B.O.?

ekVic214

oh yea thats kind of important huh
i guess more like exhaust, it doesnt smell like gas or anything like that

grumblemarc

iTrader: (4)

Then you have an exhaust leak.

ekVic214

thats what i was thinking but from where? ive looked and i cant find it. when i was running open headers i thought that was the reason and now its connected to my piping and the same thing. But when im driving i hear like a buzz so im guessing i do have a leak somewhere

ekVic214

Any body else have this problem before?

ekVic214

or have an idea where the leak might be?

grumblemarc

iTrader: (4)

Start at the joints.

ekVic214

ok im going to check it out right now thanks

EJeff8

You either have a loose joint, a broken weld, or one of the gaskets all the way from your header to your muffler is bad. Pretty simple.

vtechjunkie

iTrader: (2)

Is the line from the valve cover connected to the intake. That can cause a smell as well. Usually it's an oil smell though. But it's a possibility.

ekVic214

yea i have that one hooked up already the one in the middle of the valve cover right?
oh i was thinking the intake manifold
its not connected to the intake (i dont have one) but its blocked off

ekVic214

im thinkin somethings lose like sometimes when i take off from a stop i hear something like pop like popping into place or something

ricky00

most likely its from the header to the cat.. i always have this problem

ekVic214

thats what im thinking might be the problem but i havent had time to check it. what did it smell like to u?

ekVic214

it ended up being i didnt have the back o2 sensor on the downpipe so i hooked up a spare one i have without connecting it to the harness and its good for now

grumblemarc

iTrader: (4)

You mean as in not hooked up with the bung open?

builth22turbo

Bad donut gasket maybe were the header meeta the catback

Mike95Civic

lol that would cause your problem.. i was just gonna suggest a bad header gasket.

Good stuff finding it out on your own!

ekVic214

what do u mean the bung open?

Mike95Civic

where the o2 sensor screws in. Thats a bung. If theres no o2 sensor there, or no bolt to block it off, then its open lol.

ekVic214

oh well yea thats exactly what happened lol it was just a hole until i stuck that o2 sensor in there, now i have to extend some wires on the harness so i can plug it up and get good gas mileage lol