Why is it or Why Does my engine Backfire? it sounds like it when im at idle and sometimes shift gears. just curious b/c right now it sounds and feels as if my motor is going to go since i dont know whats wrong wit it.

 

try to change the spark plugs and plug wires or check them

 

done all that and changed cap and rotor

 

^bump^

 

i have no cat and my car backfires most of the time sounds kinda cool, not as much of a backfire as those SRT-4's

 

A backfire is typically caused by an overly-rich condition, which results in unburned fuel being passed into the exhaust, where it ignites due to heat.

 

are you sure its a backfire and not a pop from back pressure?

 

mine has the same problem,but mostly when i pull it out of gear when im rolling 20+ mph.i dont know if i have a high flow cat or if its a hollowed out cat either,just bought it a month ago..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Padawan &raquo;</TD></TR><TR><TD CLASS="quote">A backfire is typically caused by an overly-rich condition, which results in unburned fuel being passed into the exhaust, where it ignites due to heat. </TD></TR></TABLE>

i have to agree with this guy. what all did you do to your car?

 

I'm having a similar problem with mine...I'm about to just do the basic "change plugs and wires" to see if it helps at all first.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Padawan &raquo;</TD></TR><TR><TD CLASS="quote">A backfire is typically caused by an overly-rich condition, which results in unburned fuel being passed into the exhaust, where it ignites due to heat. </TD></TR></TABLE>

you the man , that is a good way to define backfire man,,,,

*here is some more issure
-backfire can happens when there is no muffler
-highlow cat w/out resonator
-piping is big

backfire happens when there is low backpressure with running fuel ratio is high and air ratior is low....you might want to get bigger CAI to compensate the unburned fuel left over, well to summarize u running over fuel you need more air to get more combustion

backfire ain't bad, some like cuz of its sound...they sound tightass though...

-they can give you 1 or 2 hp as result of pusshing force deduction out...i guess

 

I get pop noises when shifting gears after WOT to redline. Not really loud but noticable.

 

bump

 

My 94 LS pops at idle and when shifting gears but only the engine warms up,
I need some free time to do some maintenece work

 

What kind of plugs are you using...

Like that matters. Anyways what size do you gap them at?

 

good info always wondered about this

 

It probably isn't even a backfire it is pop from back pressure. It can be caused by a larger than stock diameter exhaust system. I have an apex-i GT spec on my ls and that pops alot between shifts and when cruising at high rpms