Nextelbuddy

ok i know the title sounds weird but yesteday my exhaust suddenly stopped working and i have a huge loss of power especially when vtec kicks in i have no check engine lights, and it revs all the way to 8300 but just is feels as if it is struggling and has a loss of power. also my exhaust dos not make any noise it sounds like a stock civic and i can not hear any noticable leaks. the only thing i can think of is either a leak somewhere or my exhaust is clogged somewhere like in the muffler or in the CAT but i just got a new cat installed, what do u guys think

Spade

Unbolt the exhaust in each section

Start car on header only, then the cat, then the mid-pipe, and then add the axle-back.

Nextelbuddy

well i would but my exhaust is all one pipe from the cat and back 2.25 so i can only unbolt from either the header and then after the cat. i guess im just gonna have to take it to a shop again. man i hate wasting money. i bet its something so simple too

MUGENTYPER

thats a problem on the cat, i had the same problem b4 so i made my cat a dummy cat( means that i dismantled the inside part of the cat) it works really nice now

Nextelbuddy

see i just replaced the CAT with a brand new one it cant be that it has to be a leak somewhere

Nextelbuddy

another thing is i noticed that i am getting horrible gas mileage as well. im not even getting on it and my gas is getting ate up. does anyone here think it could be a cracked exhaust manifold?

Chiovnidca

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nextelbuddy &raquo;</TD></TR><TR><TD CLASS="quote">see i just replaced the CAT with a brand new one it cant be that it has to be a leak somewhere</TD></TR></TABLE>
What was wrong with the old cat?

Nextelbuddy

it was completely clogged to where my car wouldnt rev past 4500 rpms, as soon as i got a new one put on problem solved. and now i have a huge loss of power i can still rev to 8300 but it strugles to get there now

Chiovnidca

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nextelbuddy &raquo;</TD></TR><TR><TD CLASS="quote">it was completely clogged to where my car wouldnt rev past 4500 rpms, as soon as i got a new one put on problem solved. and now i have a huge loss of power i can still rev to 8300 but it strugles to get there now</TD></TR></TABLE>
Ahh. Did you find the problem that caused your cat to die before you replaced it? Converters don't usually clog up by themselves. Did it look like it was melted?

Nextelbuddy

well i guess i didnt find out why it clogged. i thoght it was becaus it was old, because it came with my jdm ITR swap and i tried to use it and then it clogged up. i never thought about something wrong causing it to clog up now. i mean what could cause the CAT to clog up after 2 weeks its a brand new CAT

Chiovnidca

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nextelbuddy &raquo;</TD></TR><TR><TD CLASS="quote"> what could cause the CAT to clog up after 2 weeks its a brand new CAT
</TD></TR></TABLE>
Overheating from a miss allowing unburned fuel and oxygen into it.

Nextelbuddy

first of all how woudl i even find out if this was the problem, and second how would i fix it?

00MRSi

No check engine light at all? Hmm.. Does the car hesitate/bog when accelerating?

Nextelbuddy

no no hesitation or bogging, just feels liek i lost 40 hp u know. it just has no power vtec kicks in but has now power. it feels like i have a bad leak somewhere and have lost a lot of back pressure u know, or either i have a clog somewhere i dunno

Chiovnidca

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nextelbuddy &raquo;</TD></TR><TR><TD CLASS="quote">no no hesitation or bogging, just feels liek i lost 40 hp u know. </TD></TR></TABLE>
That would be about one cylinders worth, wouldn't it? Is it running on three cylinders?