Backfire

Trying to reduce my back fires, with the new exaust, when ever I throw the clutch in I get about 4-10 nice loud pops, cool for setting alarms off and all, but not really my style. I've thoroughly checked the exaust system for any leaks (none), I'm thinking maybe some work on the valves would help out a lot. Any ideas? I'm not sure what else would be contributing? I don't have a resonator on the exaust, so if I can't take it down a notch I'll have to add one on.

You do have a working cat correct? what is your setup? i saw some product that reduces noise but i need to know your setup to see weather it can be applied to it

why dont you just tell himm the product so he can check it out himself

yeah I could always just add a resonator on to it, that would just about completely quite up the back fires, I'd rather actualy lower their occurance in the first place though.

do you have a turbo? if not then something is seriously wrong where you can throw fireballs out your tailpipe for a n/a car. if its little poping sounds during a coast down in gear. then its normal. enjoy the sound. for the SRT-4's on their stage 2 upgrade kits. they tune the ecu to run the car to make that sound. so they gotta pay to get that noise, when we get it for free!!

Wouldn't a valve job greatly reduce the problem? And no it's not turbo.

I dunno for sure, but isn't backfiring when the timing is messed up and the ignition happens when the exhaust valves are open? I know that it's bad for your engine and robs you of power.

I dunno for sure, but isn't backfiring when the timing is messed up and the ignition happens when the exhaust valves are open? I know that it's bad for your engine and robs you of power.

Not really, I think what it is, is not all of the air in the cylander is being combusted, so when it leaves the engine, it's hot enough for it to ignite in the exaust. If you have say a crack on your header up high, you will get tons of backfires because fresh air is being sucked in from the backpressure. Both cases probably cost you some power. My theory on my car was that my valves being 15 years old have probably been warped a little bit, and may not be making the best possible seal letting that fresh air in

i'm not quite sure whats on my exhaust, but there's a small pipe with a mini filter attached to it.. the guy at the local shop had no clue of what it was.. but its attached to the exhaust below the headers and makes a sound like an exhaust leak... maybe this is a no-brainer but i can't for the life of me figure out what it does... some guy said it might eliminate backfire?!?
i'll get pics on asap

Just because Air (Oxygen) is getting into the the exhaust system after the combustion does not mean that the oxygen can ignite! It only ignites if it has a fuel source such as Gas fumes in your exhaust contents. and vice versa Gas cant combust without Oxygen... most back fires happen right at the end of the exhaust because the GAS is already may be past the combustion point and reaches the oxygen and ignites. lets say Gasoline combusts at 220 degrees F well in the exhaust the gas could be 300 degrees F but not combust because no source of (O2) available. So something is whacked out with your exhaust and why its only when you shfit? iunno

It's not when you shift, it's when you let go of the gas pedal.

hmm well i looked at the product and realized i was thinking the wrong subject... my ideas are to check out your head gasket and compression rings on your pistons... thats all i can think of

hmm well i looked at the product and realized i was thinking the wrong subject... my ideas are to check out your head gasket and compression rings on your pistons... thats all i can think of

It'll be the valves way before the compression.

adjustable FPR, Fuel Computer???

backfires while revving down are just what happens when it runs too lean to burn in the combustion chamber. the unburnt fuel collects in the exhaust where the heat has time to set it off. if its doing it while accelerating then you've got bad timing/ingition

if your holding flames while downshifting that means its dumping a shitload of fuel in and doesnt have the air to burn in the chamber

P.S you guys really over thought this. learn to love it... its TeH JayDM 1337ness!!11one!!!

i have that same symptom. if i shift normally like around 2500rpm or leave off the gas and let it rev down i get a poping noise. personally, i just thought it was the changing of air flow, but good chances i am wrong. does anyone have a good reason why it does this?

i have that same symptom. if i shift normally like around 2500rpm or leave off the gas and let it rev down i get a poping noise. personally, i just thought it was the changing of air flow, but good chances i am wrong. does anyone have a good reason why it does this?
didnt R.W.240 just answer this completly, what more do you want?



On a completly unrelated note, I was driving the other day, and had a Mazdaspeed Protege do a ricer flyby on me, so I decided to pull a ricer flyby on him at about 130. When I let off the throttle, I held a 10 second flame, or something like that. Then, he follows me off the highway, and pulls up next to me at the light. There are 4 guys in the car, and one of them asks me, "Hey mang, you got that flame thrower kit?" I just started laughing hysterically, the light turned green, and I drove away without answering his question.


That had absolutly nothing to do with anything, just thought I would share that experience :sunglasse

i don't know if you guys have seen that dvd with all the cars going across the us (i think it was a race)...
anyhoo.. they made stops every once in a while and at one stop this guy had a mustang with the classic 'GTR' badge on it.. so one of the guys with the video camera and his buddy went up to the guy at the car and said "is this your car?" so the guy says yep yep its mine.. "its a gtr mustang?" yep yep.. "sweet, do you know if its rotary?" ....uhhh yeah.... "man it must be quick.. does it have headers??" yep...

...so the guys walk away laughing.. "a gtr mustang, rotary with headers...."

i think that guy could have won meatball of the year

i guess this goes with REDFC3S's experience, as it has nothing to do with the actual thread but was quite comical


anyways.. what were we talking about?

maybe the owner before you secretly installed a missfiring system and your car is actualy turbo but you just dont know it lmao just kidding why dont you just get it checked out by the dealership?????

I reverse my previous statment That occasional backfires while decelerating are perfectly normal to say that backfires indicate that the flux capacitor is blown and you need to hit 88 miles an hour for it to reset. in the meantime i suggest you use a train to push your car around... you'll move faster if you paint the logs red.... its like nitrous for trains.

I reverse my previous statment That occasional backfires while decelerating are perfectly normal to say that backfires indicate that the flux capacitor is blown and you need to hit 88 miles an hour for it to reset. in the meantime i suggest you use a train to push your car around... you'll move faster if you paint the logs red.... its like nitrous for trains.
:rofl:

Eversince i started reading up more around here and posting more... things have gotten more "intresting" *refers to the postings by RedFC3C and R.W.240 and D-Bo*

Is this contagious?

Eversince i started reading up more around here and posting more... things have gotten more "intresting" *refers to the postings by RedFC3C and R.W.240 and D-Bo*

Is this contagious?
explain

explain
do things get this sill/funny around here?

I thought it was funny because everyones freaking out over a normal occurance. "oh god my headgasket / valve seals / Valves Seats / Piston rings are all fucked up because its backfiring off throttle" I explain how i thought it worked and the next post is...

"does anyone have a good reason why it does this?"

so naturally I assume that it was wrong so i go to www.yourlogicalanswersucks.com and find that the reason it backfires is because of the flux capacitor. Who knew?
:dunno:

do things get this sill/funny around here?
only when Im around


:evillol:

lol Am I the only guy dumb enough to have clicked on that link?