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Old 05-07-2012, 06:47 PM   #1
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exhaust popping

Anyone have problems with a popping sound from your exhaust? My idle goes down a little, then my exhaust pops and my idle goes back to being regular. Any suggestions?
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Old 05-07-2012, 06:51 PM   #2
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Sounds like back pressure.
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Old 05-07-2012, 06:53 PM   #3
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Ha, mine does that to after I run him hard, normal for me though.
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Old 05-07-2012, 07:00 PM   #4
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I have a similar problem ... Well not really a problem yet until I get a sct tuner. I had my exhaust redone 3 weeks ago. At idle my rpm is 700-750 regular and when I Stop at a light my rpm drop to 500 for 2-5 seconds like it's going to shut off but I doesn't. I think the sct tuner will help me here. Let's see. Same problem I think without the popping sound.
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Old 05-07-2012, 07:04 PM   #5
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Yeah my idle does the same exact thing, except that when its starting to idle back up it pops? No CE light or anything
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Old 05-07-2012, 07:21 PM   #6
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Mine does that too, I think its the IAC valve, I'm changing mine tomorrow ill let you all know if it helps.
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Old 05-07-2012, 07:23 PM   #7
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I replaced my iac a few weeks ago when i installed my cai
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Old 05-07-2012, 08:49 PM   #8
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What was yours doing.before you replaced it?
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Old 05-07-2012, 08:52 PM   #9
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Same thing, popping. As well as idle going up and down
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Old 05-07-2012, 09:23 PM   #10
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Okay, I ordered mine tonite it'll be here at 1 tomorrow.
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Old 05-07-2012, 09:39 PM   #11
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Cool, let me know how it turns out. Im thinking a possible vac leak somewhere? I don't think its a missfire or anything cause when my mazda had problems with that its like i was running into a wall with the car bucking, and jumping.
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Old 05-07-2012, 09:47 PM   #12
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Mine will do like a one pop or two pop occasionally when idling. I haven't noticed any RPM changes when this happens.
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Old 05-10-2012, 05:56 PM   #13
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Never had the problem like its said here but I am curious to find out the problem and solution.
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Old 05-10-2012, 09:50 PM   #14
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If you are running rich excess fuel in the exhaust can ignite and cause a pop...but that wouldn't explain the idle issue..
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Old 05-10-2012, 09:56 PM   #15
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Yeah i knew about the fuel, always use regular octane 87
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Old 05-10-2012, 10:44 PM   #16
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Quote:
Originally Posted by 1shotkllz
Yeah i knew about the fuel, always use regular octane 87
If u r running without cats or without exhaust you will hear it even with 87....but that still doesn't explain the idle
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Old 05-10-2012, 11:23 PM   #17
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I've been chasing this idle hunt for awhile now. Honestly have no idea where to even start now lol
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Old 05-10-2012, 11:27 PM   #18
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Quote:
Originally Posted by 1shotkllz
I've been chasing this idle hunt for awhile now. Honestly have no idea where to even start now lol
Make sure you don't have any leaks in your cold air setup after the mass airflow sensor. My buddies truck idled up and down and he wound a leak in his stock setup. Probably from off-roading.
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Old 05-10-2012, 11:46 PM   #19
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Got a cai, no leaks or anything. Already checked that
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Old 05-10-2012, 11:48 PM   #20
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Quote:
Originally Posted by 1shotkllz
Got a cai, no leaks or anything. Already checked that
MAF seems clean? Also, did it start doing this after removing the factory screen? Apologies if you've done this already.
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Old 05-10-2012, 11:54 PM   #21
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Yeah maf is clean, and it was doing this before. Its cool, bro. Is it possibly air temp sensor on the intake?
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Old 05-11-2012, 12:05 AM   #22
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Quote:
Originally Posted by 1shotkllz
Yeah maf is clean, and it was doing this before. Its cool, bro. Is it possibly air temp sensor on the intake?
Could be that and maybe affecting EGR. Do you have EGR delete? Dunno what kinda symptoms that would have exactly.
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Old 05-11-2012, 12:07 AM   #23
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I was reading up on the EGR yesterday, and don't i have to have a tuner to turn it off?
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Old 05-11-2012, 12:09 AM   #24
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Quote:
Originally Posted by 1shotkllz
I was reading up on the EGR yesterday, and don't i have to have a tuner to turn it off?
Your idle is affected, how about when you accelerate?
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Old 05-11-2012, 12:17 AM   #25
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I know if i get into it kind of hard then have to come to a stop it usually almost stalls out if not completely. Sometimes it stalls out 3 or 4 times in a row until it finally idles
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Old 05-11-2012, 12:22 AM   #26
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Quote:
Originally Posted by 1shotkllz
I know if i get into it kind of hard then have to come to a stop it usually almost stalls out if not completely. Sometimes it stalls out 3 or 4 times in a row until it finally idles
I'd check the fuel filter, then maybe spark plugs. Does it smell like gas when it's doing this above ^?
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Old 05-11-2012, 12:25 AM   #27
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Nah no gas smell, i thought about that and checking the cops as well
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Old 05-11-2012, 12:33 AM   #28
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Nah no gas smell, i thought about that and checking the cops as well
Yup on COPs. Watch them dang connectors. I broke the lil part that clicks and it would stay connected. Luckily it would stay connected when I put the COP all the way in place. Dunno if you can buy new harness or not. Gotta be something simple. Seems like it the chasing part that's hard on this stuff.

---------- Post added at 01:33 AM ---------- Previous post was at 01:28 AM ----------

Quote:
Originally Posted by Azure

Yup on COPs. Watch them dang connectors. I broke the lil part that clicks and it would stay connected. Luckily it would stay connected when I put the COP all the way in place. Dunno if you can buy new harness or not. Gotta be something simple. Seems like it the chasing part that's hard on this stuff.
Also, check PCV valve, make sure not to replace with cheapo brand.
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Old 05-11-2012, 12:59 AM   #29
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I'm just hoping its nothing expensive. My luck its something simple i should of looked at first. Same case with my mazda, replaced everything that caused a missfire until i was told the coil pack was bad. i got tired of chasing that gremlin
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