P0478 Diagnostic Trouble Code Discussion for December 2013
Exhaust Backpressure Control Valve Excessive
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| Help Request | Posted | |
| 2002 Ford F-550 Super Duty XL 7.3L No Power VIN: 1FDAF57F52 P0478: Exhaust Backpressure Control Valve Excessive. ... Powerstroke with low / no turbo boost under acceleration most of the time. When initially started cold and first time down the block you can hear / feel turbo spool up and then shortly after power drops off. Fuel pressure at housing is 55 psi, drops to may... |
December 23, 2013 |
