so when my car is idling the exhaust seems to pop sporadically. also if im at constant a steady throttle every once in a while u the rpms seems to waver a little bit. but as frequent as the popping. anyone have any ideas i bought new plugs today gonna put those in here in a little while.

 

New plugs can smooth out minor misfires at idle.

 

It could also be your timing is retarded and needs to be put back in factory spec.

 

k well after i put the plugs in ill up date. o btw its a s4 n/a stock just a cat back

 

got plugs to late thread on hold till tommarow morning..

 

i would suspect a leaking exhaust and you mentioned that a possibility in a different thread. new gaskets would probably fix it but note all possibilities before spending money on something that may not do the job

 

my exaust is buttoned up now the gasket at the back side of the cat was bad and replaced it but that got fixed bout a month ago and it popped before and after. in about 6-7 hrs ill do the plugs and see if it fixes it. also the entire engine shakes when its popping if that rings a bell to any one. if i had a camera i would post a video

 

Had something similar when I was trying to get mine running

I had to readjust all of the idle components including the timing, also got the injectors cleaned..worked for me.

I think in my case I was trying to open up the idle way too much, not knowing my injectors weren't running very good so I wasn't getting good combustion

 

well put new plugs in the old ones looked almost rusty. not 100% sure if its still doing it didn't let it run long cause its 7 in the morning and a duel muffler cat back is still loud with stock exhaust. but on a side note. my clutch petal has more pressure now. only thing i did was. pull all the plug wires, disconnect my p/s hoses so i could get my arm in there a little better, and put it all back. but i'll post later after work with update. anyone think i should run injector cleaner again ran some thru as soon as i got the car only put prolly 1k-1.5k miles on it in 2-3 months. and i set my idle the other day to what it should be. it was popping before me setting idle just wanted my idle not 1500 anymore.

 

Wait.. your car's backfiring?

I know what it is.....




You drive an RX7!

 

its not a back fire its like a pooping not a bang. and the engine shakes. but yeah still popping. w/e turbo swap soon hopefully

 

hopefully my tii parts car this car was in near perfect shape before my supervizor got it and messed it up for the truck show. the fire department was supposed to like cut it open for a demo. but they didn't touch it. so what u see is how it is. i think that right half shaft is broke. but w/e ill find out today

 

Moar pics! Moar Pics!

 

im hoping that not to much is fucked up looks like the hood is messed. planed on making the stock tmic a fmic would look cool with the turbo sittin down there. we'll see on monday when i actually get into the impound yard

 

Check your wire ends and make sure that they are not corroded/rusted too. If they are, the will not make proper contact wit the plugs. Other than that, check your idle controls and see if you can see any exhaust leaks.

 

ehh not to worried it learned to live with it and just looking forward to the new turbo set up. and about the wires are nearly new prolly like 3 months old and ive only put like 1500 on them. i adjusted the tps like a week ago but that was only to bring the idle down its always done the popping. but w/e

 

If you have mods all bets are off

all the various emissions, fuel, and exhaust components work together to make the car drive and idle like a "normal" car

 

This is true. You must tweak and twerk my son.

Borrow a wideband. That would be the FIRST thing i'd do. You're going turbo anyway so do one better and buy one. You can get them used fairly cheap.

I have all my emissions on my n/a deleted (s4, a bit more forgiving) and run a slightly cracked tb to keep my idle at 800-750. It pops no more than a usual rotary, not at all at idle. That sounds bad. Maybe your afm needs to be tweaked. (yes, you can do that. There's a how-to on youtube!).


edit: Your boss should be clubbed with a full grown pine tree for doing that to an s5 factory turbo car.

 

the engine is completely stock only thing done to the car really is a cat back. im gonna buy all sorts of gauges. just waiting till when i actually do the swap. ill find out here in like half hr if i get the parts or not

 

yes got it..300 bucks to take everything i want witch is everything thats not broken and it looks like everything is intact just about. 1 very weird thing. it had 2 bac's no **** it had the thick what i think are coolant lines running to 1 and the other 1 was attached to the uim with the electrics connected to it. very weird i thought anyone ever hear of such a thing? also i think the engine might have been rebuilt the uim is pained along with a few other thing like this weird mess of **** to the top right of the engine bay. anyone know what that is i have no idea . ill look in the fsm but if can't see it someone let me know.