New fuel pump=high idle

[John Deere 4240]

So I dropped in a brand new sending unit and fuel pump, shortly after I noticed that going from park or neutral to drive or reverse it drops into gear hard enough to jolt the truck. I believe that it is from the higher idle now with the new pump, it's running just under 1000rpm at idle. Not sure if I gota hook it up to a scanner to tune the fuel regulator back or if it requires a new regulator. Or what it is exactly...

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[Johnbalderas90k1500]

What year truck and if its stock or not.

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[John Deere 4240]

98 sierra and it's a stock pump and motor

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[Johnbalderas90k1500]

Ok well if you can check fuel pressure it should be around 60 psi

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[Johnbalderas90k1500]

The fuel pressure regulator should drop pressure when its connected and raise it when disconnected

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[John Deere 4240]

Never mind it was just a weird coincidence, Prolly caused by a buddy, that a vacuum hose on the air intake came off when I swapped the pump

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[Johnbalderas90k1500]

Ok good glad you figured it out

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[John Deere 4240]

Thank u for ur time tho

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[Johnbalderas90k1500]

No problem

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