ricstr03

I have an 2008 mustang gt, stalls on take off, but once past 3 grams she is off like a rocket, and also sometimes she cuts out, while i'm driving, i have done everything to try to figue this crap out, plus i'm getting terrible gas mileage, 230 miles to a tank, thats with 93 octane, i have changed out TB, changed out the mass flow air sensor, new plugs and boots, MSD boots, so i am putting top of the line into my stang, I have k& n CAI, performance pulleys, 62mm ford racing Throttle Body, SCT programmer, bigger throttle body custom tune on my tuner, someone even told me to change out the 02 sensors, did that too, just freak'n frustrating to put all this money out and no changes, if anybody has any ideas, let me know, thanks, oh yea, another thing, sometimes she don't want to start on first try....just had to throw that in there...thanks

waykooljr

Have you changed the fuel filter?

kevinmalec

Sorry to hear the issues you are experiencing....
Have you checked to make sure your ground wire is not loose in your engine compartment? Ground wires are located in front of the washer fluid resevoir.
Also, have you tested your battery and alternator?
In addition to the fuel filter (mentioned above), maybe a bad fuel pump or gunked up fuel lines.

Nuke

Some of the mods you've installed have been related to poor performance and idle issues, mainly the TB and the COPs. I'd probably go back as close to stock as possible and begin from there. Yeah, I mean stock tune and airbox, too. If it still stumbles then you know it wasn't your mods.

SpartaPerformance

No codes? When did it start, was after a performance tune?

ricstr03

yes, I changed the filter, very first thing I've done

ricstr03

its weird that you had post this, cuz now I am having electrical issues, went through 4 alternators so far, battery light is coming on at start but once I drive a few miles battery light goes off, I am going to check ground in the morning, is there more than that one ground that you described?

waykooljr

Holy thread revival!

Check your throttle body too, it may need a cleaning.

moosestang

4 alternators? Where are you getting these alternators? I would only trust a PA performance alternator from amercian muscle. All the ones you get from autozone or discount auto are remanufactured stock alternators, which we all know suck!

Is this an auto or manual? Where did you get the replacement MAF sensor? Unless you got it from Ford, I'd go back to your stock one. Odds are there was nothing wrong with the stocker, but the ones on ebay or from autozone are junk.

I agree with going back to stock to rule out the tune. Who's tune, amercian muscle, brenspeed?

There is an engine ground at the top/middle of the firewall.

Under drive pulleys are probably responsible for your battery light and maybe your alternator problems. Not a big fan of under drive or over drive pulleys.

moosestang

What spark plugs?