P0478 Diagnostic Trouble Code Discussion for January 2009
Exhaust Backpressure Control Valve Excessive
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| Help Request | Posted | |
| 2001 Ford F-350 Super Duty Lariat 7.3L thumping noise VIN: 1FTSX31F81 P0478: Exhaust Backpressure Control Valve Excessive. help not a dsl. tech. customer complains of a thumping noise from exhaust when the vehicle is first warming up. only happens when first started cold. I have replaced ebp sensor and tube both were cloged also replaced waste gate solinoid resistance was out of t... |
January 28, 2009 |
