2014 GT500 Lazy To Rev

yello 5.0

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This is a long shot, but here goes. This car is a garage queen that is rarely driven. I drove it to work this morning and noticed under load, the exhaust has a cherry-bomb like sound with very little acceleration, but the gauge shows boost. I babied it home but took a short vid where you can hear the miss/hesitation and laziness to rev (website saying extension error). It idles smooth, no CELs. Checking for vacuum leaks now...any insight would be awesome cuz I’m lost.
 

2011 gtcs

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Stock exhaust. It’s a 2014 with the VMP Stage 2 from a year ago (TB, tune, JLT 123). Car actually turned 19k miles today. Stock pulley & plugs.
Possible your cats may be clogged, do you have the stock parts? I'd try and swap it back to stock and see what happens.
 

efnfast

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Tap it with a rubber mallet and see if you hear stuff rattling around inside the cat?
 

2011 gtcs

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Reading the cats might be toast. Anyway to tell besides dropping the pipes?
The stock H-pipe is pretty easy to take off and inspect the cats, even than you might not see any visible damage with the naked eye. Might be a good time to switch to a OFR X pipe
 

yello 5.0

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Thanks for the suggestions. I swapped out the plugs and coil packs, running normal again. However, no smoking gun...the coil packs & plugs look great. Maybe one of the coils would crap-out under load.
 

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