Just recently I've noticed my car has been making a rather loud popping noise after heavy acceleration.

It happens maybe 2-4 seconds after I let off.

It sounds like it's coming from where the downpipe connects to the exhaust... But i'm not positive.

What should I check?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sedlmeier101 &raquo;</TD></TR><TR><TD CLASS="quote">Just recently I've noticed my car has been making a rather loud popping noise after heavy acceleration.

It happens maybe 2-4 seconds after I let off.

It sounds like it's coming from where the downpipe connects to the exhaust... But i'm not positive.

What should I check?</TD></TR></TABLE>

DS: 99' civic d16 v-tec motor t3/t4 hybrid turbo denso 650cc injectors.

Your running 650cc injectors and a turbo, have you ever gotten a tune?
Sounds like your running rich

 

My car pops slightly after letting off but I also have several dime sized holes in my muffler. Check for noticeable leaks first.

 

i gutted my cat before on my 91 civic dx and it it was very loud backfirng after. is ur cat gutted, high flow, no cat?? is the resonator still there??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by excivicboy96 &raquo;</TD></TR><TR><TD CLASS="quote">My car pops slightly after letting off but I also have several dime sized holes in my muffler. Check for noticeable leaks first.</TD></TR></TABLE>

air entering the exhaust system mixed with HOT unburnt fuel will ignite and cause a popping sound on decel/tip out. so find and fix your exhaust leak and u won't have anymore "backfire"

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crxricer66 &raquo;</TD></TR><TR><TD CLASS="quote">i gutted my cat before on my 91 civic dx and it it was very loud backfirng after. is ur cat gutted, high flow, no cat?? is the resonator still there??</TD></TR></TABLE>

Are you confusing gargling/pops to backfiring? Yes, removing a cat will make your exhaust louder, raspier, and make it have louder gargling/pops. You would know if it was an actual backfire, becuase it would sound like a shotgun blast, and wake the neighborhood, lol.

 

It's deffintly a backfire...

My r6 would gurggle/pop on decel...this is not what my car is doing.

It sounds more like a gun shot..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sedlmeier101 &raquo;</TD></TR><TR><TD CLASS="quote">It's deffintly a backfire...

My r6 would gurggle/pop on decel...this is not what my car is doing.

It sounds more like a gun shot..</TD></TR></TABLE>

Yeah, some people get them confused quite often.

It def. sounds like a backfire though.

This comes from dumping raw fuel down the downpipe (it ignites).

You're probably running hella rich.

Get your turbo tuned, and if it is tuned, see if they have to go so heavy on the rich side...I mean yeah play it safe, but not to point where it's backfiring.

 

 

I read the title as Pooping/backfiring after heavy throttle. I was going to recommend a diet change, a new seat, and, if all else failed, rubber pants