help code P1689

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#21

03-28-2014, 02:54 PM

thermort

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Join Date: Mar 2014

Location: Port Saint Lucie, FL

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I am getting the same code P1689. I had my lift pump go out. Changed the lift pump and the fuel filter. Now the truck runs but it misses badly at idle. It gets smoother at 2000 RPM.
Any ideas?

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