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1999 School Bus w/Cummins 5.9 engine
Posted to HD/Fleet Forum on 3/12/2009 5 Replies

Driver reported the vehicle engine lost power when load is needed. I pulled the following trouble codes from my generic Nexiq scanner. PID: 91 FM: 2 and FM:13 SID: 237 FM: 11

Also, noticed the engine with the original lift pump. I'm the process of preparing ... Login to read more.

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