Ruff idle after long tube header install

[smpw]

Hello

Can't find anything on here so I thought I would ask

I just installed long tube headers on my 2014 gt 5.0 and was wondering if it's normal for the car to run ruff and die when coming to a stop the only codes I have are for the (IAT) and the (MAF)
I've checked all the wiring and fuses cleaned the MAF and looked for vacuum leaks but the issue is here I have 12v at the harness of the MAF
Just wondering if this is normal or should I replace the MAF

 

[Juice]

Its hungry for some doggy chow

 

[08TorchRedShelbyGT500]

Did you get a custom tune when you installed those headers? That would be a pertinent recommendation.

 

[StockishS197]

Have you updated your tune?

It has to be updated to increase the O2 transport delay, otherwise it will run rough, especially at idle/low exhaust velocity.

 

[Juice]

You dont need a tune for transport delay on a gen1 coyote.
Car has fault codes... Hmmmm, what should be the first step??

 

[Blue03Cobra]

You dont need a tune for transport delay on a gen1 coyote.
Car has fault codes... Hmmmm, what should be the first step??

And the congregation said: "Scan it"

 

[Juice]

And the congregation said: "Scan it"

He already has, IAT & MAF codes... hmmm, those couldn't possibly be important......