I have a 94 gsr with aem CAI, dc sport 4-2-1 headers and an apexi n1 catback exhaust. I ust 93 octane and when i down shift and let the gears hold the car back theres a popping noise coming from exhaust i think the gas is exploding in the exhaust and i can hear it from inside the car. Any suggestions of what i should do aand how i can resovle this problem. Any help is appreciated. Thanks

 

it's probably a back fire, 2 of my friends car did it, one of them said they needed to get it tuned right.. and the other said it was his Distributer.. so i dunno.. lets see if neone says nething else..


bump

 

my car does it also...its backfire, running to rich causes this.

 

same here, aem sri, dc 421 & greddy evo2...a little backfire...Running rich...? So how does the car gets to run rich without any changes?

 

im going to get some other parts should i just wait for them, then tune my car and take it in to see whats wrong or will it damage my car. If theres no effect of it damaging my car i think ill just wait.
Thanks for all your help

 

yeah it is a backfire. having less back pressure or more free flo can cause that noise. to fix it...add a regsinator. another possibility is valve lash...try getting a valve adjustment

 

i was going to get a resinator anyways so i hope it fixs it but after i do like some major motor work im going to get my car tuned and dynoed adn stuff so it will hopefully make it stop. But how much louder is a resignator going to amke it.
Thanks

 

your car is running fine.. the apexi is a pretty big change over your stock exhaust.. it is just a much much more free flowing exhaust and the pop is just negative pressure.. no biggie.. my car does the same thing with my thermal and it runs more than fine.. dont sweat it.. the large difference in the back pressure is all it is, good luck

 

Thanks for your help.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mugenspoongsr &raquo;</TD></TR><TR><TD CLASS="quote">i was going to get a resinator anyways so i hope it fixs it but after i do like some major motor work im going to get my car tuned and dynoed adn stuff so it will hopefully make it stop. But how much louder is a resignator going to amke it.
Thanks</TD></TR></TABLE>
A resonator will not make your exhaust louder. It will actually make it quieter.