Back Fire question!!!!!!!!!!!!!!! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

s141996 · 06-03-2011, 09:25 PM

How can u eliminate back fire or reduce some of it? or is it even possible??

camaro379ss · 06-04-2011, 02:57 PM

What kind of setup are you running?

s141996 · 06-04-2011, 04:17 PM

sr20 s13 setup

jr_ss · 06-04-2011, 04:33 PM

Hmmm seems pretty basic... How about you give us some details of your setup if you want us to attempt to help you out.

s141996 · 06-04-2011, 04:37 PM

I"m running a t25 turbo with a 2 1/2 pipe 62ecu,greedy bov,greedy intercooler and i'm running stock bost

indoz33 · 06-04-2011, 05:16 PM

usually sr runs on the lean side unless you get it tuned... is it spitting out fire or is it just the sound?..

naw_speed · 06-04-2011, 05:33 PM

is the bov atmospheric or recurculating? had the same issue and found that when the bov is atmospheric the extra fuel that enters the cylinder does not burn due to lack of o2 that was releast through the bov. the maf reads the air but it never makes it to the cylinder. so when the gases are pushed out through the exguast they ignite in the pipe. . . i think that right..

NiSilS14 · 06-04-2011, 06:05 PM

That is right, A open BOV will create rich conditions on MAF-based which can include backfires and other drivability issues. Try doing a basic tune-up, new spark plugs and clean injectors can help.

s141996 · 06-04-2011, 09:51 PM

ok thanks guys

06-03-2011, 09:25 PM	#1
s141996 Zilvia Junkie Join Date: Sep 2010 Location: IE Age: 38 Posts: 324 Trader Rating: (6) Feedback Score: 6 reviews	Back Fire question!!!!!!!!!!!!!!! How can u eliminate back fire or reduce some of it? or is it even possible??

06-04-2011, 02:57 PM	#2
camaro379ss Zilvia Junkie Join Date: Mar 2011 Location: Indianapolis, IN Posts: 363 Trader Rating: (4) Feedback Score: 4 reviews	What kind of setup are you running? __________________ 1991 Nissan B13 Sentra sr20det 300whp/1991 Nissan S13 240sx sr20det ~260whp

06-04-2011, 04:33 PM	#4
jr_ss Post Whore! Join Date: Dec 2005 Location: Pa Posts: 6,415 Trader Rating: (35) Feedback Score: 35 reviews	Hmmm seems pretty basic... How about you give us some details of your setup if you want us to attempt to help you out. __________________ My SR20VET Does your VTC gear rattle in your S14/15 SR? PM me.

06-04-2011, 05:16 PM	#6
indoz33 Zilvia Junkie Join Date: Oct 2008 Location: Santa Ana Posts: 405 Trader Rating: (12) Feedback Score: 12 reviews	usually sr runs on the lean side unless you get it tuned... is it spitting out fire or is it just the sound?.. __________________

06-04-2011, 05:33 PM	#7
naw_speed Leaky Injector Join Date: Apr 2008 Location: san antonio Posts: 87 Trader Rating: (0) Feedback Score: 0 reviews	is the bov atmospheric or recurculating? had the same issue and found that when the bov is atmospheric the extra fuel that enters the cylinder does not burn due to lack of o2 that was releast through the bov. the maf reads the air but it never makes it to the cylinder. so when the gases are pushed out through the exguast they ignite in the pipe. . . i think that right.. __________________ ))-> sil front on.. time for rocket bunny kit<-((

06-04-2011, 04:17 PM	#3
s141996 Zilvia Junkie Join Date: Sep 2010 Location: IE Age: 38 Posts: 324 Trader Rating: (6) Feedback Score: 6 reviews	sr20 s13 setup

06-04-2011, 04:37 PM	#5
s141996 Zilvia Junkie Join Date: Sep 2010 Location: IE Age: 38 Posts: 324 Trader Rating: (6) Feedback Score: 6 reviews	I"m running a t25 turbo with a 2 1/2 pipe 62ecu,greedy bov,greedy intercooler and i'm running stock bost

06-04-2011, 06:05 PM	#8
NiSilS14 Zilvia Junkie Join Date: Sep 2003 Location: Denver, CO Posts: 569 Trader Rating: (20) Feedback Score: 20 reviews	That is right, A open BOV will create rich conditions on MAF-based which can include backfires and other drivability issues. Try doing a basic tune-up, new spark plugs and clean injectors can help.

06-04-2011, 09:51 PM	#9
s141996 Zilvia Junkie Join Date: Sep 2010 Location: IE Age: 38 Posts: 324 Trader Rating: (6) Feedback Score: 6 reviews	ok thanks guys