Most common is the fuel pump
and need to be replaced
this is the TSB
check it out
and good luck
TECHNICAL SERVICE BULLETIN
2004 - 2007 armada
low power with wide open throttle and stalling
Low fuel pressure may cause DTCs to be detected. If you have DTCs with this incident, first replace the fuel pump and then recheck the DTC diagnosis
Connect a fuel pressure gauge to the engine (special tool kit J-44321 or equivalent).
Follow all instructions under "Fuel Pressure Check" in Section EC of the Service Manual for connecting the fuel pressure gauge.
Look at the fuel pressure while performing a transmission "Stall Test".
The Stall Test 10 minute warm up is not needed for this Service Procedrue.
Follow all other instructions for performing the Stall Test under "Inspections Before Trouble Diagnosis" in Section AT of the Service Manual.
CAUTION:Do not hold down the accelerator pedal for more than 5 seconds while performing the Stall Test.
Fuel pressure is NG if it drops below 45 psi during the Stall Test.
If the fuel pressure is OK, this bulletin does not apply. Return to ASIST for further diagnosis and repair information.
If the fuel pressure is NG, go to step 3.
Replace the fuel pump.
Tuesday, June 27th, 2017 AT 4:14 PM