B18B1 USED 2B IN 94 INTEGRA LS
BACKFIRED THEN BUT MAYBE ONCE OR TWICE A DAY
I DID SWAP 4 MONTHS AGO N2 92 DX HATCH
UPGRAGED THE EXHAUST 2.5 BACK FROM CAT

IT BACKFIRES 2-3 TIMES EVERYTIME IM SLOWING DOWN

I HAVE NO CHECK ENGINE LIGHT/ECU CODES

NO SMOKING FROM TAIL PIPE BUT IS A STRONG SMELL I CANT TELL IF RICH OR LEAN SMELL(MAYBE BURNING FIBERGLASS)

FUEL PRESSURE TURNED UP 2 40PSI BUT I KNOW PEOPLE RUNIN 45PSI NO PROBLEMS

ALSO I HAD 2 ADJUST TIMING 2 HIGH END TORQUE(IT IDLE VERY BAD IF I ADJUST ANY LOWER) BUT IT IDLES AT 900RPM AN TAKES OF SLOW(POSIBALY IACV)

BUT ON THE BACK FIRING SUBJECT I WOULD REALLY LIKE 2 KNOW WHAT THAT IS CAUSE IT BURNED ALL THE FIBERGLASS OUT MY MUFFLER AN IT IS VERY LOUD AN I HAVE 2 MAKE A 200MILE TRIP SATURDAY

IS IT DETINATION PROBLEMS

WHAT DO U GUYS THINK

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by STPREZ &raquo;</TD></TR><TR><TD CLASS="quote">B18B1 USED 2B IN 94 INTEGRA LS
BACKFIRED THEN BUT MAYBE ONCE OR TWICE A DAY
I DID SWAP 4 MONTHS AGO N2 92 DX HATCH
UPGRAGED THE EXHAUST 2.5 BACK FROM CAT

IT BACKFIRES 2-3 TIMES EVERYTIME IM SLOWING DOWN

I HAVE NO CHECK ENGINE LIGHT/ECU CODES

NO SMOKING FROM TAIL PIPE BUT IS A STRONG SMELL I CANT TELL IF RICH OR LEAN SMELL(MAYBE BURNING FIBERGLASS)

FUEL PRESSURE TURNED UP 2 40PSI BUT I KNOW PEOPLE RUNIN 45PSI NO PROBLEMS

ALSO I HAD 2 ADJUST TIMING 2 HIGH END TORQUE(IT IDLE VERY BAD IF I ADJUST ANY LOWER) BUT IT IDLES AT 900RPM AN TAKES OF SLOW(POSIBALY IACV)

BUT ON THE BACK FIRING SUBJECT I WOULD REALLY LIKE 2 KNOW WHAT THAT IS CAUSE IT BURNED ALL THE FIBERGLASS OUT MY MUFFLER AN IT IS VERY LOUD AN I HAVE 2 MAKE A 200MILE TRIP SATURDAY

IS IT DETINATION PROBLEMS

WHAT DO U GUYS THINK

</TD></TR></TABLE>

Which timing are you adjusting? Ignition or Camshaft?

Is the car stock? mods?, etc....

 

ignition (distibutor)

no internal modes

4-2-1headers
52mmplugs
intake
intake spacer
fuel pressure regulater
other minor things

 

I can only assume you have some kind of straight piping exhaust system with a cheap muffler. If you think the fiberglass is all burned out of it, then it's pretty low quality. Get a long resonator welded into your exhaust system at an exhaust shop and it will reduce the problem. You can also turn your fuel pressure back down to stock and see if that helps. Also, make sure the cam timing is at a perfect 0* TDC and the ignition timing is set right on the middle line, not advanced or retarded at all. Also, replace the muffler. Your problem is sure to be solved after this minor work.

 

ya its a cheap muffler an the resonator has been removed but know other people wit the same setup an theres dosent sound like mine
when i turn down fuel pressure it makes no changes
when i put th ignition timing back 2 center it just idles up an down in around 600rpm variables

could the idle problem be the iacv(idle air control valve)

 

Tighten the screw inside the FITV valve, that's why it idles like that... search the 92-00 Civic forum for that topic, you'll find plenty of info. Set your timing back to the stock setting. The resonator will help to deaden what's left of the backfiring noise, and a new muffler will as well.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CycloneBlue_1.6EL &raquo;</TD></TR><TR><TD CLASS="quote">Tighten the screw inside the FITV valve, that's why it idles like that... search the 92-00 Civic forum for that topic, you'll find plenty of info. Set your timing back to the stock setting. The resonator will help to deaden what's left of the backfiring noise, and a new muffler will as well.</TD></TR></TABLE>

You mean this: https://honda-tech.com/zerothread?id=699787

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lord Helmet &raquo;</TD></TR><TR><TD CLASS="quote">You mean this: https://honda-tech.com/zerothread?id=699787 </TD></TR></TABLE>

That's a good example!