kraemer29

about to weeks ago i installed bk off road xpipe, bk headers, gt500 fuel pump, and the edelbrock e-force supercharger with the 10lb boost pulley. I took it to a good performance shop and got it tuned. The car ran great for about a week.Now when i put the pedal to the floor in the high rmps(around 4000) it cuts out and some times makes a pop like its back firing.If i slowly accelerate it doesnt do it. I talked to the guy at the performance shop and he said to check the spark plugs.Any other things i should check?

Cal26Stang

Is your traction control on? because it cuts power significantly...

kraemer29

its with the traction control off

stang8psi

is there a two step in the tune?

kraemer29

2 step? im sorry i dont know what that is lol

marcuskeeler

Those RMP's are little buggers eh?

vasman

I am guessing it is your sparkplugs. they start by failing on high rpms and the fail at any rpm but hi load and eventually always fail.
read:

https://mustangforums.com/forum/2005...ugh-plugs.html

kraemer29

okay i got a spare set at home so il check it out thanks!!!

vasman

Try spacing the old ones first...

kraemer29

it was def the plugs.i changed them and it was a night and day difference thanks!!!