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Old 09-18-2013, 01:10 AM   #1
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Engine Crackling Noise Under WOT

My GT has this weird crackling noise under WOT. Aways had it but is intermittent and usually only for the first time I WOT it which isn't as often as you might think.

After it happens once it does happen again unless I turn the car off. I have tune and O/R exhaust but this was there before any mod at all. Figured knock sensor would flag it if it was knock.

I've noticed other GTs do it too. Namely the black GT on you with the Borla SType exhaust.

It's not pre-ignition I don't think. It sounds like electricity crackling rather than knocking. I've seen videos of other stands that have this noise too.

Any ideas on what it is?
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Old 09-18-2013, 05:26 AM   #2
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Pinging I believe
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Old 09-18-2013, 05:41 AM   #3
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Definitely sounds like detonation ping, quite common with the 5.0. Many believe it has to do with the stock tune and/or Pro Cal tuner.
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Old 09-18-2013, 08:02 AM   #4
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Sh it no way...

Its been this way for all my 22K miles. Have BAMA tune on it. So it's probably is a tune issue?

I've run 5 or 6 different BAMA tunes and they all have it. Can't believe its all tunes that have detonation.

This is very bad...
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Old 09-18-2013, 10:30 AM   #5
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Originally Posted by DallasStang77 View Post
My GT has this weird crackling noise under WOT. Aways had it but is intermittent and usually only for the first time I WOT it which isn't as often as you might think.

After it happens once it does happen again unless I turn the car off. I have tune and O/R exhaust but this was there before any mod at all. Figured knock sensor would flag it if it was knock.

I've noticed other GTs do it too. Namely the black GT on you with the Borla SType exhaust.

It's not pre-ignition I don't think. It sounds like electricity crackling rather than knocking. I've seen videos of other stands that have this noise too.

Any ideas on what it is?
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Originally Posted by DallasStang77 View Post
Sh it no way...

Its been this way for all my 22K miles. Have BAMA tune on it. So it's probably is a tune issue?

I've run 5 or 6 different BAMA tunes and they all have it. Can't believe its all tunes that have detonation.

This is very bad...
We send out thousands of tunes and build them all from the ground up for your PCM code and your mods. They're not just "canned" tunes, they're built custom by our team, so every once in a while it's possible we mess one up! The chances of us messing up 5-6 tunes on the same car are extremely unlikely. Please shoot me a PM with your order number included and I'll have a Bama tuning specialist contact you right away!

It's hard to pin point exactly what you're experiencing. It does sound like pinging or detonation but there's no way all of your 5-6 Bama tunes would have the same issue. Have you tried returning the car to stock and seeing if it still happens? If it does still happen it's not related to the tune.

Hang in there, we'll help you troubleshoot and get you squared away!

-Dan
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Old 09-18-2013, 11:20 AM   #6
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Lifters are fine cuz I don't hear ticking at idle. Maybe I'll swap out the plugs this weekend and see if that works. Not exhaust issue either took it to exhaust shop to test for leaks.

Dealership trip I guess but for sure its out of warranty. Hmmmm... Fix Or Repair Daily seems applicable if a lot of mustangs seems to experience this as one user said.
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Old 09-18-2013, 12:10 PM   #7
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What octane gas are you running? Have you swapped out the plugs before?
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Old 09-18-2013, 12:18 PM   #8
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Lifters are fine cuz I don't hear ticking at idle. Maybe I'll swap out the plugs this weekend and see if that works. Not exhaust issue either took it to exhaust shop to test for leaks.

Dealership trip I guess but for sure its out of warranty. Hmmmm... Fix Or Repair Daily seems applicable if a lot of mustangs seems to experience this as one user said.
It's a modular motor, they all make noise.
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Old 09-18-2013, 12:32 PM   #9
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What octane gas are you running? Have you swapped out the plugs before?
Always 93 octane and 95% of the time from the same 3 stations I pump at. I try not to pump from stations I never got gas from before. Always from busy stations (99% from Chevron) so I don't run into owners who cheat on gas by diluting it or selling 87 for 93 to boost profits. Friend of mine did it at her moms gas station. That's effed up so I try to be careful.
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Old 09-18-2013, 12:33 PM   #10
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Always 93 octane and 95% of the time from the same 3 stations I pump at. I try not to pump from stations I never got gas from before. Always from busy stations (99% from Chevron) so I don't run into owners who cheat on gas by diluting it or selling 87 for 93 to boost profits. Friend of mine did it at her moms gas station. That's effed up so I try to be careful.
Yeah, you gotta watch out for stuff like that these days unfortunately. Have you changed the plugs?
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Old 09-18-2013, 12:40 PM   #11
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The sound isn't like pebbles or sand in a can. It isn't like metal thumping or knocking on something.

Usually only happens after starting up the car and first time WOT. After that no sound. But if i turn the car off for gas or walmart or whatever and restart it the sound is there again the first time i floor it. No wot no sound. Half throttle or even idk 80% throttle no sound.

So I figured maybe its part of just warming up the car or plugs are cold since cold metal conducts electricity better. Thought also maybe Mustangs are so powerful that they put nuclear reactors to provide powerful sparks so its normal =P

I've heard other mustangs make that noise in videos as well as in real life. I heard a mustang GT take off (stock) and had that sound too.

The sound is like on one of those BBQ grills where you push a button and the spark goes crackle crackle crackle crackle until it lights the gas. It's rhythmic and doesn't get faster as you accelerate. Doesn't change in pitch or volume either. Just crackle crackle crackle then nothing on the next shift.

Also... If I remember correctly its only in first gear. No crackle in second and on.

---------- Post added at 12:40 PM ---------- Previous post was at 12:37 PM ----------

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Yeah, you gotta watch out for stuff like that these days unfortunately. Have you changed the plugs?
No still on stock plugs
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Old 09-18-2013, 12:41 PM   #12
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The sound isn't like pebbles or sand in a can. It isn't like metal thumping or knocking on something.

Usually only happens after starting up the car and first time WOT. After that no sound. But if i turn the car off for gas or walmart or whatever and restart it the sound is there again the first time i floor it. No wot no sound. Half throttle or even idk 80% throttle no sound.

So I figured maybe its part of just warming up the car or plugs are cold since cold metal conducts electricity better. Thought also maybe Mustangs are so powerful that they put nuclear reactors to provide powerful sparks so its normal =P

I've heard other mustangs make that noise in videos as well as in real life. I heard a mustang GT take off (stock) and had that sound too.

The sound is like on one of those BBQ grills where you push a button and the spark goes crackle crackle crackle crackle until it lights the gas. It's rhythmic and doesn't get faster as you accelerate. Doesn't change in pitch or volume either. Just crackle crackle crackle then nothing on the next shift.

Also... If I remember correctly its only in first gear. No crackle in second and on.

---------- Post added at 12:40 PM ---------- Previous post was at 12:37 PM ----------



No still on stock plugs
Are you sure it's the engine? Maybe it's your speakers. I know sometimes when I use bluetooth for music, I get some weird popping sounds occasionally.
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Old 09-18-2013, 12:49 PM   #13
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God I hope it's my speakers. But I usually drive with no music and windows down even if its 100deg out.

Electrical interference with the speakers on acceleration? I don't think it is. Power is off. But I will turn down the volume and see if that makes any changes.

But my cars got over 22K now and I've done plenty of nice sprints in it. Hasn't imploded or exploded (*saying this while knocking on every piece of wood I can find and silently praying to the car mod gods wherever whoever he/she/it/they may be*)
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Old 09-18-2013, 12:56 PM   #14
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God I hope it's my speakers. But I usually drive with no music and windows down even if its 100deg out.

Electrical interference with the speakers on acceleration? I don't think it is. Power is off. But I will turn down the volume and see if that makes any changes.

But my cars got over 22K now and I've done plenty of nice sprints in it. Hasn't imploded or exploded (*saying this while knocking on every piece of wood I can find and silently praying to the car mod gods wherever whoever he/she/it/they may be*)
I would also check your plugs and coil pack connections.
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Old 09-18-2013, 01:06 PM   #15
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Lifters are fine cuz I don't hear ticking at idle. Maybe I'll swap out the plugs this weekend and see if that works. Not exhaust issue either took it to exhaust shop to test for leaks.

Dealership trip I guess but for sure its out of warranty. Hmmmm... Fix Or Repair Daily seems applicable if a lot of mustangs seems to experience this as one user said.
You saying that your 3/36 warranty is expired? How about your 5/60 powertrain warranty? If it turns out to be engine (after your 3/36 bumper-to-bumper is expired), you're still covered. Not exactly sure but, I would think any engine related components and engine electrical/fuel/oil systems are covered too. Worth a shot to find out.
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Old 09-18-2013, 01:09 PM   #16
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You saying that your 3/36 warranty is expired? How about your 5/60 powertrain warranty? If it turns out to be engine (after your 3/36 bumper-to-bumper is expired), you're still covered. Not exactly sure but, I would think any engine related components and engine electrical/fuel/oil systems are covered too. Worth a shot to find out.
Yeah... I just looked and it says you've got a 2013... No WAY it's out of warranty yet...
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Old 09-18-2013, 01:12 PM   #17
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I would also check your plugs and coil pack connections.
Will do. Gonna check the connection for loose wires or corrosion and then install the Barton shifter tonight with the two post bracket after work.

Then I'll run up to auto zone see about some new plugs.

What plugs do u use or recommend?
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Old 09-18-2013, 01:29 PM   #18
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You saying that your 3/36 warranty is expired? How about your 5/60 powertrain warranty? If it turns out to be engine (after your 3/36 bumper-to-bumper is expired), you're still covered. Not exactly sure but, I would think any engine related components and engine electrical/fuel/oil systems are covered too. Worth a shot to find out.
I got a tune on it. Modded suspension and full exhaust with no cats. Returning it to stock isn't a problem but tunes leave a stink and trail... So since its survived 22K and I've had this sound since forever even before 2k miles I'll try out some stuff before returning to stock and take it to the dealer.
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Old 09-18-2013, 01:54 PM   #19
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Sounds like the exhaust pipe.
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Old 09-18-2013, 01:55 PM   #20
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I got a tune on it. Modded suspension and full exhaust with no cats. Returning it to stock isn't a problem but tunes leave a stink and trail... So since its survived 22K and I've had this sound since forever even before 2k miles I'll try out some stuff before returning to stock and take it to the dealer.
Ok. I can see doing that first.
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Old 09-18-2013, 09:27 PM   #21
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I got a tune on it. Modded suspension and full exhaust with no cats. Returning it to stock isn't a problem but tunes leave a stink and trail... So since its survived 22K and I've had this sound since forever even before 2k miles I'll try out some stuff before returning to stock and take it to the dealer.
I wouldn't worry about taking the car back to stock. It could be a small electrical issue in which you have no modified on the car. If the Service Tech says your modifications have caused it you'll have to prove otherwise.

As far as plugs go: NGK Laser Iridium Performance Mustang Spark Plugs (11-14 GT, Boss) 3789||ILTR6A-13G - These seem to be popular from American Muscle.

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Sounds like the exhaust pipe.
OP stated the noise was there before exhaust modifications and after. I believe that can be ruled out.
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Old 09-19-2013, 10:37 AM   #22
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Exhaust pipes ping when they get hot, also when they cool down.
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Old 09-19-2013, 12:41 PM   #23
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Exhaust pipes ping when they get hot, also when they cool down.
I don't think this is the kind of pinging he is hearing, but I get what you're saying. Usually exhaust popping on cool down doesn't have a consistent pattern like he stated he has in this situation.
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Old 09-20-2013, 01:35 AM   #24
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I've tried recreating the nose all day today after work. No luck. Well I should actually say good luck.

Maybe Gizmo and his gremlin buddies decided my engine is no longer a good place to live. Cars still pulling strong.

Barton Shifter w two post bracket is in. At first I wasn't 100% sold on liking it. But now that its starting to be broken in .... I love it.

Still not thrilled with the extra difficulty of pressing down and reverse tho. When I push down I lift my body up just slightly off the seat. Maybe i just need to drive a few more days for it to loosen up. And it's hard to slide to the left too.
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Old 09-21-2013, 07:41 AM   #25
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Thank you all for your input to my thread. I think that I'm just paranoid because lately I've been tempted to SC my with a Roush Phase 3 (carhttp://www.americanmuscle.com/roush-r2300-phase-3-supercharger-1114gt.html) and I'm just picking on stuff being all worried about things.

After the latest tune from BAMA I thought I still had it but then again between the CAI suckin up front and the catless exhaust blowing in the rear I can't hear the crack as much if any. So maybe it was a tune or something with the cats I have no idea.

Also I noticed now, I blip the throttle a lot more after going catless but I don't WOT it hardly at all. Maybe cuz I'm paranoid with the loudness and being arrested for "disturbing the peace".

So after 7-8 WOT after starting the car I can't hear the crackle... I don't know but I guess... No problem anymore. Thanks again for sharing in my momentary nightmare!
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