Silvia Club of NSW

Hi Guys,

My mates car back fires alot when changing to 2nd and 3rd gear.

Good or Bad?

only if i blows big coloured flames. blue is a good colour. pink isnt so good for masculine cars.

anyway, its severely overfuelling if it does that. and the car has no cat and an externally venting BOV

_________________
M35 Stagea.info @ http://www.m35stagea.info/

Some say running rich is a good thing.... how often is it backfiring?
Is it everytime you change into 2nd and 3rd...or just once in a while?

Pretty much all the time. I notice that when he drives normally it backfires alot... But when he Drives full racing style ... none

hmmmmnnnn .... mmmmm .... we changed the oil (Royal Purple) and the spark plugs .... but it seems to be making noise.

It doesnt lose power or anyfin .... just wondering if its normal. I reckon its the exhuast.

So many factors, so few details... What type of car is it?

_________________
chris.

running rich is only good to a certian point. depending on tune etc.. when it back fires is it blowing huge smoke?

_________________

backfire or just a rich popping noise from the exhaust on over run?

There's a big difference, in volume and in potential to cause damage.

_________________
meh

tell him to drive 'full racing style' all the time and it should solve his problem then.

backfiring is when it comes through the inlet, very bad

in the case of what you are talking about, it is unburnt fuel igniting in the exhaust,

a lot of cars will do this if they have the cat convertor gutted/removed, and a free flowing exhaust with straight through mufflers fitted, as it provides no restrictins for the flame/explosion to be stopped and comes out the exhaust

Could just be the car running overly rich, i've seen it on heaps of cars, mates 5speed EA falcon, my datto 1600, a few RB powered cars etc

_________________
i need more power, preferably yesterday

My car backfires every now and again, not frequently...probs once every 2 days or so but its more of a pop. it did a loud bang once it scared the shit out of me lol

not too sure why though but this thread has made me understand a little better!

what if ur car's stock apart from an i/c and catback? seems to have a big popping noise in the high revs and big load.. low revs and driving normally it doesnt happen.. is that considered backfiring?

also what did u mean by if its back thru the inlet?

_________________
fkn kill u DOMA c*nt

oh i should note that the popping happens btw gear changes in high revs

_________________
fkn kill u DOMA c*nt

what about in those HPI DVDs those GTRs backfire like crazy during the 1/4 mile.

isnt the exhaust side called 'after fire' ? my car does it pretty hard some times after being flogged or on really cold day or when throttle is closed very slowly seems the ecu see's the throttle as like 0.1% open or something like that and keeps fueling like at idle but on deceleration there is also an ignition cut on my car.

but yea obviously after market ecu. mainly this is just a bubble sort of sound but some times like banging and very ocasionally like the type of back fire an old bomb does ie. very loud

_________________
"Best Signature Ever Inserted Here"

maybe anti-lag ?

_________________
"Best Signature Ever Inserted Here"