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[SinCityFX4]

Originally Posted by my67rt

Hey SiCityFX4 I have a 07 F150 4.6 with an AFE CAI and my truck does the same backfiring thing when it is cold in the morning. I was told that it was from being too lean and that Bill would be able to fix it with my custom tune that he is making for me, but now I am nervous. I am staring to think that it is from the AFE brand CAI bc the only people on this site that are having the same problems as we are have an AFE CAI.

It has always hesitated if I put any kind of throttle when I first start it up with the VMP/PHP tunes. It has only backfired with PHP's. Just needs some tweakin .....email tuning is an impossibly hard thing to do.

Originally Posted by JackandJanet

AND, if you don't get this behavior at all with Justin's tune, then it DOES point to something that needs adjusting in Bill's tune, doesn't it? I'm sure he can fix it, once he knows it has to be fixed.



- Jack

Sure will...I will try and give em a call and see what we can dig up. Keep ya posted.

P.S.

PHP Rocks