Have them attach a fuel pressure gauge to the fuel rail and watch fuel pressure under acceleration.
Also, have them check for a plugged catalytic converter. Easy to do by watching the MAF sensor data.
This sounds just like a lack of airflow or a severe lean condition.
__________________
Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years.
Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.
|