I have an 05 Lariat screw that has developed a stalling problem. Upon start up it fires and runs fine, but when it warms up it will lurch and stall. It has the CEL on now and engine in failsafe mode message. I have already replaced the battery, MAS, TPS, fuel filter, and cleaned throttle body thoroughly as well as added sea foam to fuel in tank. Haven't had it scanned yet as battery has been replaced. Hoping it's something relatively simple, but I'm thinking it's the fuel pump. Any thoughts, ideas, or advice will be greatly appreciated, otherwise I guess I'll have to slay that dragon known as the fuel pump.

 

it goes into failsafe mode usually when a knock sensor is bad or detects knock, or if it's running out of water i think...

 

x2 plug a scanner in to it and let me see what codes it is throwing

 

Ok, I had it scanned this afternoon and codes were as follows....P2106...P061B...P0320....and P2106 a second time

 

Had it scanned this afternoon, and pulled these codes..in order...P2106...P061B...P0320...P2106 a second time....thank you for the help

 

by the codes it leads me to be a throttle body problem

 

I've cleaned the TB thoroughly, almost as clean as new...isn't the 061B or 0320 codes for the crank trigger, or whatever....couldn't remember which code it was

 

cleaning it wont make a difference if the TPS is bad. if i didnt know that you changed it already, i would have recommended a new throttle body. solved my problem when it happened to me.