Hi I have a 1995 del sol vtec and sometimes when I am at like let say 4000rpm or higher and I let off the gas it backfires I can hear crackles coming from the exhaust nothing loud tho. The only mods I have are mugen twin loop exhaust (catback) aem short ram intake, aem pulleys. It has a b16a3 motor and I use 92 octane gas.

ps: The car runs fine I am just curious what would cause this. The motor only has 124k on it.

 

Back-firing is generally caused by an overly-rich condition, where raw fuel in the exhaust ignites due to heat.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Padawan &raquo;</TD></TR><TR><TD CLASS="quote">Back-firing is generally caused by an overly-rich condition, where raw fuel in the exhaust ignites due to heat. </TD></TR></TABLE>

So my car is running rich ? How do I fix this ?

 

I was backfiring a lot and I was told to check the valve lash and the distributor cap...my distributor cap is cracked and missing a bolt, have yet to replace it though.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by leeminho86 &raquo;</TD></TR><TR><TD CLASS="quote">I was backfiring a lot and I was told to check the valve lash and the distributor cap...my distributor cap is cracked and missing a bolt, have yet to replace it though. </TD></TR></TABLE>

o ok I guess I will take it to a mechanic when I have time

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jit01 &raquo;</TD></TR><TR><TD CLASS="quote">So my car is running rich ?</TD></TR></TABLE>

It's possible. Are you throwing any codes? Is the car up to date on scheduled maintenance?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Padawan &raquo;</TD></TR><TR><TD CLASS="quote">It's possible. Are you throwing any codes? Is the car up to date on scheduled maintenance? </TD></TR></TABLE>

I am getting no cels and I just bought the car from happy honda (honda dealership) in jan so I had it for like almost 4 months. I also don't remember if it was doing this before or not lol.. it only back fires some times I was thinking maybe its because I have an exhaust.

 

do you have a catalytic convertor? b/c it happens during decel, makes me think the cats clogged or you have carbon build up on the injector causing it to leak.

 

my civic was stock motor stock ecu just intake header no cat and exhaust. 00 si it usto pop fire. the motor was never touched ! stock dizzy settings everything stock ! and it would pop fire. i dont think it was running rich.