OK, So I have been doing all the reading and have done everything I could trying to avoid this.
I have a 1999 7.3 PSD, The truck idles rough, Stalls at Idle and low speed/RPM's, Surges, Hesitates on take off.
This is what I have done so far:
Swapped IDM's, Swapped IDM Relay, New CPS, Removed Bully Dog 4-Bank, and Checked the Injector wiring on the outside of the valve covers, and I still have the same problem.
This was done at operating temp, in park and holding around 2000 RPM's
Engine Speed 2011 RPM
AP Sensor (V) 0.92V
BARO (P) 14.2V
CONT DTC's 2
EXH Back (P) 53.3 psiA
EXH Back PR
FUEL Inj PW 1.62ms
Glow Plug DC 0%
GP Control 0.0s
GP Lamp 0.0s
MAP (P) 15.1psi
Manifold (P) 0.9 psiG
Net Engine Torqu 28 lb-ft
VREF Voltage 5.00mV
EOT (V) 1.46V
Exhaust BP (V) 4.78V
BARO (V) 4.44V
EXHAUST BP 366.4 psiG
VPWR Voltage 14.0V
MAP (F) 0.0Hz
A Mastertech Scanner was used. The Exhaust is 4" and Open and possibly has a 5" Resonator. The 2 DTC's are:
P0470 Ex Back Press Sensor CKT MALF
P0478 Ex Back Press Control Hi Input
Any Help would be greatly appriciated. Thanks
Also just checked the tube coming from the exhaust manifold to the sensor on the front of the engine behind the idler pulley.