muffler backfires with irritating sound...

1,685

Asked by Feb 27, 2012 at 08:57 PM about the 1996 Honda Civic DX

Question type: Car Customization

a couple of months ago i took out the resonator and fabricated a 2.25 OEM pipe... i have a 2-feet
long repacked muffler (RS5 Bosal) which has a nice quiet sound with a bit of  hoarseness during
idle... but when i cruise to 65kph and up with 4000-4500rpms, it backfires like a fart can and its
really a sound you wouldnt want to wake u up at night... engine runs fine, also got larger 4-1
headers but why does it sound that bad sometimes?

12 Answers

1,685

here's a closer look at the muffler tip... http://static.cargurus.com/images/site/2011/03/06/07/23/1996_ho nda_civic_4_dr_ex_sedan-pic-5400455329664654081-tmb.jpeg

Best Answer
1,135

is it a poping sound or a backfire sound this is backfiring and its my 240 http://www.facebook.com/photo.php?v=2365700054470

1,685

backfire like a loud spitting sound in high speeds...

1,685

what do i need to change? is it possible something's wrong like pipes are too big or something's loose? i really hate that sound, it's like "sssprrrrraaang!!!" or something like that, it happens during top rev before i shift... when it's idle, it sounds fine and when i step on the gas its not that loud at all..and there arent even any flames coming out even though it sounds like it...

7,345

is it happening right when you let off the gas basically? if so its the lack of restriciton without a proper tune. youre engine is cutting fuel delivery when you back off the pedal to quickly and youre hearing it. you need to adjust the dfco table to compensate

1,685

how do i adjust it? this happens only on higher rpms and when i downshift to accelerate more...

1,685

dfco? does this have something to do with downshifting often? i have AT transmission?

1,135

maybe put your catalytic converter back in and it will stop.. or get a standard

1,685

i still have my cat... i just pulled out the resonator...

1,685

i guess there's something wrong with a 2" diameter catback piping and aftermarket header? i didnt find anything wrong though...

7,345

the only way to adjust is it with some sort of tuning program.

1,685

this is how it sounds during idle... but when im driving, there is a sort of loud sputtering... a little louder than the sound of stepping on the gas during idle... http://www.facebook.com/photo.php?v=397542996926523

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