Vaccum pump running - Ford Powerstroke Diesel Forum
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Old 09-16-2011, 08:18 AM
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Vaccum pump running

Just did an egr delete new oil cooler on my 04 6.0L excursion.

Now the vacuum pump is running constantly.

If I unplug the 90 degree tube coming off of the pump and put my finger over it the pump stops running.

The vacuum line (grey) running to the coolant line on on passenger side intake manifold (for heater I assume) has no suction.

When I flip the 4x4 switch I can hear it engage and disengage.

I am having trouble tracking down the leak in the grey line where I assume the problem is. Any suggestions?
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