Popping coming from exhaust while idling

[masonmort27]

Over this winter I threw an ESS G3R on my gen 3. Since doing so, it’s developed this interesting popping coming from ONLY the driver side exhaust. Video attached. The car threw a couple misfire codes, specifically for 6 and 7. Took it to the shop that did the supercharger install and Spark plugs are good and relative compression test was good. The misfire readings were barely anything. But still.

Car has the ESS G3R kit, high flow catted long tubes, ID1050X injectors, opg, crank sprocket, ported boss 302, bullitt throttle body, vortech fuel pump booster, and I’m running NGK Ruthenium spark plugs. Only have ran Sunoco 94 in it since boosting it.

My shop is stumped. Sent a data log to my tuner and waiting to hear back from him, but what might I expect? Saw a couple threads on similar things like this but they were not very active, nor was the popping nearly as bad as mine.

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[engineermike]

Sounds like a loose baffle in the muffler or a broken active exhaust valve (if equipped).

 

[masonmort27]

Sounds like a loose baffle in the muffler or a broken active exhaust valve (if equipped).

Thought that too. Banged on the mufflers and nothing was rattling around in there, they were completely solid. And I don’t have active exhaust

 

[NGOT8R]

I’m gonna take a guess and say maybe a blown cat rattling around in it’s shell.

 

[masonmort27]

I’m gonna take a guess and say maybe a blown cat rattling around in it’s shell.

How can that be checked?

 

[NGOT8R]

You can pull the exhaust up to your mid pipe and have a look. When mine blew, the cat material was being sucked in and blown out during acceleration and deceleration.

 

[masonmort27]

You can pull the exhaust up to your mid pipe and have a look. When mine blew, the cat material was being sucked in and blown out during acceleration and deceleration.

10-4, I’ll give that a look sometime this week

 

[Swtbabybilly]

Someone drop a nut or bolt in the header when they did the install? You can start from the header and work your way back with a dead blow hammer and give everything lite taps with the hammer see if you hear anything banging around or like ngot8r said a peace broke off off the cat you can do the same thing give it a tap see if u hear anything, best of luck

 

[NGOT8R]

10-4, I’ll give that a look sometime this week

https://www.mustang6g.com/forums/th...t-failure-and-broken-weld-on-mid-pipe.191891/

 

[masonmort27]

Someone drop a nut or bolt in the header when they did the install? You can start from the header and work your way back with a dead blow hammer and give everything lite taps with the hammer see if you hear anything banging around or like ngot8r said a peace broke off off the cat you can do the same thing give it a tap see if u hear anything, best of luck

Headers weren’t done during the supercharger installation

 

[masonmort27]

https://www.mustang6g.com/forums/th...t-failure-and-broken-weld-on-mid-pipe.191891/

When yours blew out did you only hear it at idle? Mine sounds fine while driving

 

[SCP440]

Could it be a misfire ?

 

[masonmort27]

Could it be a misfire ?

We see nothing on the data logs that suggest that and the spark plugs look good

 

[NGOT8R]

When yours blew out did you only hear it at idle? Mine sounds fine while driving

My exhaust note changed whether idling or driving. You’ll know for certain when you pull the exhaust and have a look,

 

[Swtbabybilly]

Headers weren’t done during the supercharger installation

Gotcha wasn't sure if it was all at once, best of luck

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