P0471 Diagnostic Trouble Code Discussion for June 2014
Exhaust Backpressure Circuit Range/Performance
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| Help Request | Posted | |
| 1999 Ford Econoline Super Duty Custom 7.3L MIL Lamp on VIN: 1FDXE40F2X P0471: Exhaust Backpressure Circuit Range/Performance. The check engine light goes on and off and the bus runs rough and lacks power. when it warms up it runs a little better but not good. It also smokes blue on acceleration when it is warm. The The engine cranks well and evenly. I am leaning toward #3 and #5 inje... |
June 04, 2014 |
