xdani3l

When my engine goes over 2,000 RPM the fan will not blow out of any vents. You can hear the air blowing but it isnt coming out of anywhere. Once the car is back under 2,000 RPM the air blows out of whichever vent the A/C is set to blow out of. Any ideas?

Thanks!

4.3L XJ

When it does this, check the defrost vents. If it comes out there, it means that you have no vacuum to the controls. Does it have its reservoir, or a vacuum leak somewhere?

xdani3l

The air is coming out of the defroster. Is there an easy fix for this problem or will I have to bring it in to get it fixed?

mobilecherokee4

same problem with me except it does this all the time, i just put some freon in it today

seed

As 4.3L XJ said,this is a vacuum problem,check your lines somewhere there is a disconnected or bad line, should be an easy fix.

4.3L XJ

By same problem, do mean intermittent air out of vents?

taterguy05

VERY EASY PROBLEM to fix bro, look under the hood, look to the right side of your motor on the INTAKE MANIFOLD, look at the rear VACCUM LINE, follow it all the way over to the left side of the ENGINE BAY, where it connects to the T LINE, it prolly came unhoooked there, its got to be within that VACCUM, mine did the same exact thing