04mineralgreyGT

Did you change your fuel filter? What are your spark plugs gapped to? Your spark could be blowing out with the boost you're running to get 540 rwhp.

primetime5.0

what mods do you have?

Aereon

damn dude... that is not a little to get 540... if your on a stock blower your boost is high off the charts... if the guy tuned you for 98 oct.... why run 95?

PWORLDSTANG

WOW! It sounds like your having some serious problems!.. First, that guy who told you to run 98 octane is full of ****!.. Who is he?.. You should run whatever your car is tuned to run! If that is 98 octane, then that is what you run. But 98 octane is a little high. Even with your power you should be fine on the highest pump gas you have available in your state. Second, did you make that much power with Nitrous and/or a ported blower? It would help if I knew your mods... But If you're still running with the Eaton, you could be maxing out your fuel pumps, pegging your MAF, or your plugs could be gapped incorrectly. I don't know your mods so I'm just throwing stuff out there. I'm willing to bet you have a Kenne Bell or Whipple on. What are your mods?

stangarang

yeah a mods list would be nice to see what's up with your cobra.

rbstang

sounds like a clogged fuel filter or possibly dirty injectors...

04mineralgreyGT

Or possibly B.S.?

ZAXJAX

Fuel filter, fuel pump or dirty injectors. I somehow managed to get a bad batch of gas once, I had water in the tank somehow.