So I tune today and tune went perfect car dumped at 509rwhp and 446hp. On the way home from the shop car drove perfect. After traveling for about 1hr and 30min car was running great. Getting near my exit I punched it in 2nd to feel a pull car pulled awesome but 5min after that car started stalling and it turned off on me.

I turn the car on and it starts up but idles for about 5 seconds then it shuts off, any idea why this is happening?

 

You have a wideband or any gauges that are showing anything out of the ordinary?

 

Try disconnecting your MAF see if it idles.

 

Checked all ground cables all sensors and fuses and there all good

 

Boost gauge reads fine and the a/f gauge reads fine for the 5seconds that it's on and ima try disconnecting the MAF but it has a mafia on it

 

Could it be spark plugs causing it to turn off?

 

Most likely wouldn't allow it to start in the first place if it was spark plugs. Like I said, disconnect the MAF and try and start the car. Let me know what happens.

 

that's not gonna be spark plugs. Gotta be some sort of sensor. Did they put a chip in it? If so maybe they didn't clean off the pcm well enough where you connect the chip at, if there's still **** on there it could easily get "disconnected" randomly which would cause it to stall.

 

Kerm I'm going to try the MAF sensor and let you know but why would you think it's that? And no they didn't chip it he wrote the tune downloaded it to my diablo sport then downloaded it to the car

 

do you have the option of downloading a different tune back onto your car while saving the one he made you? that way you can try a different tune just to see if that could be it.