Does your rpms move with back pressure valve? - Diesel Forum - TheDieselStop.com
1999-2007 General Questions General questions related to 1999-2007 Super Duty trucks. If it doesn't fit the other categories, post it here. Gas engine discussion that pertains to all models is allowed. Specific gas engine questions should use the Gas Engines forum.

 
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post #1 of 2 (permalink) Old 05-01-2018, 07:14 PM Thread Starter
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Does your rpms move with back pressure valve?

Since no one wants to post on the other section was just wondering during initial startup and having the bp valve operating does your rpms go up and down on the tach I never had noticed it before and now I'm questioning if this is normal... It is lined up perfectly with the valve rpms drop when valve closes and is about 100 to 200 rpms it is not a romp but more of a load type of drop
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post #2 of 2 (permalink) Old 05-01-2018, 11:57 PM
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I never looked but it should because you are affecting airflow and making the engine work harder.
DENNY

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