Headers/Intake/Exhaust Custom Exhaust? New Headers? Need Opinions on Intakes? Discuss making your ride breathe better here.

Why Does My Car Backfire?

Thread Tools
 
Search this Thread
 
  #11  
Old 01-12-2013, 08:23 AM
ChibiBlackSheep's Avatar

Monte Of The Month -- August 2014
15 Year Member
10 Year Member5 Year Member3 Year Member1 Year Member
Join Date: Sep 2008
Location: Southeast PA
Posts: 25,136
Default

Originally Posted by nitehawkjcb
You do not need to use 1 or 2 on the gear shift, you will get zero gains from it and you will destroy your transmission.
Counter point is bad weather driving though
 
  #12  
Old 01-12-2013, 09:56 AM
STUMPMI's Avatar

Monte Of The Month -- February 2013
5 Year Member
3 Year Member1 Year Member
iTrader: (1)
Join Date: Dec 2011
Location: Taylor Michigan
Posts: 9,944
Default

If its happening under decelleration...its no biggie....

However, If you have that much unburnt fuel..Your definitly haveing a fuel regulateing problem...Especially if its happening while excellerating...
It could also be a valve, poping, timing issue...Which will overtime eventually blow up the motor....which also leaves a lot of unburnt fuel in the system since it isnt breatheing correctly! (in time)

For the sake of clarification and better help...
Maybe you could post a video of what its doing and sounds like?

Its hard to do diagnostic on somethiong we cant see or hear...
 
  #13  
Old 01-13-2013, 11:25 AM
S.O.G.'s Avatar
5 Year Member
3 Year Member1 Year Member
Thread Starter
Join Date: Mar 2012
Location: Minnesota
Posts: 513
Default

yes it only happens during deceleration. but I did notice it only start happening after I finished up my exhaust. will try to post a vid asap. thanks for all input and advice! some mechanic said it could be because I'm using the wrong type of gas?
 
  #14  
Old 01-13-2013, 01:23 PM
Join Date: Mar 2009
Location: MD.
Posts: 5,152
Default

lol what type of gas are you putting in? Nothing but premium for your engine.


Maybe you have crappy mufflers?
 
  #15  
Old 01-13-2013, 03:38 PM
S.O.G.'s Avatar
5 Year Member
3 Year Member1 Year Member
Thread Starter
Join Date: Mar 2012
Location: Minnesota
Posts: 513
Default

I fill up with 93 and yes my mufflers are a bit crappy lol I have flowtech raptor mufflers
 
  #16  
Old 01-13-2013, 03:58 PM
Join Date: Mar 2009
Location: MD.
Posts: 5,152
Default

Never heard of them.


Any CEL codes?
 
  #17  
Old 01-14-2013, 07:43 AM
ChibiBlackSheep's Avatar

Monte Of The Month -- August 2014
15 Year Member
10 Year Member5 Year Member3 Year Member1 Year Member
Join Date: Sep 2008
Location: Southeast PA
Posts: 25,136
Default

Originally Posted by SS Supercharged LA
yes it only happens during deceleration. but I did notice it only start happening after I finished up my exhaust
That's what happens. On a stock exhaust system you usually don't hear it.
 
  #18  
Old 01-14-2013, 10:38 AM
S.O.G.'s Avatar
5 Year Member
3 Year Member1 Year Member
Thread Starter
Join Date: Mar 2012
Location: Minnesota
Posts: 513
Default

ok so it's not anything I should worry about?
 
  #19  
Old 01-14-2013, 10:42 AM
ChibiBlackSheep's Avatar

Monte Of The Month -- August 2014
15 Year Member
10 Year Member5 Year Member3 Year Member1 Year Member
Join Date: Sep 2008
Location: Southeast PA
Posts: 25,136
Default

No, I already explained that it's excess fuel being burned off upon deceleration. Completely normal for cars to do that so we get better MPG. The engine is allowing the movement of the tires to keep it going, unlike at idle when the injectors are firing.
 
  #20  
Old 02-02-2013, 10:41 AM
Join Date: Dec 2012
Location: Apple Grove, WV
Posts: 81
Talking

Originally Posted by STUMPMI
Flowtech?

Is that 1 of those chrome looking garbage can size muffler thingys?
That sounds like someones passing gas?

otherwise I have no clue what a flowtech muffler does...(Never heard of it)
A flowtech muffler is just a cheap glasspack like a cherry bomb. They're 17.95 at summit. I'd say the noise is one of them weird exhaust leaks, I've heard exhaust leaks that make you think the vehicle is about to straight die; then it ends up being a leak.
 


Quick Reply: Why Does My Car Backfire?



All times are GMT -5. The time now is 01:03 AM.