Kind of stumped on what I have going on. while either upshifting or down shifting the engine will just hold rpm for awhile after you take your foot off the pedal which makes it very difficult to drive even if you try to double clutch. It will do the same if you just rev it while parked sometimes it takes 10+seconds to come down
Cat 3406B peec engine won’t idle down while shifting
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by jsetzer90, Sep 18, 2020.
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Check for air in the fuel to the injection pump.
jsetzer90 Thanks this. -
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I would look closely at the throttle position sensor and the rack sensor or BTM I believe they called it
pushbroom Thanks this. -
Dirt on the fuel pedal
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My Big Cam Cummins done the same thing...I changed the Fuel Filter and it fixed it ..
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Possible lost a governor spring if it is a 3406B
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