I have a vaccuum line off but i cannot locate where at, it seems to be out of sight and reach. This is a 1999 tarus SE 16 valve, any suggestion.

yes you should see a small round canister with an electrical plug and a vacuum line on each side of it like a tee fitting follow the vacuum line to the big black charcoal canister box or go in the reverse from the charcoal canister backwards and you should find it the charcoal canister should be on the inside of the fender and you will find the purge valve LATER MAN!

sounds like a bad starter

Have to test or replace battery

Then have to test starter solenoid & or starter

Could be ignition switch or other items in starting system

Yes the check valve holds vac in the booster.
Not sure about the line you replaced.

It's under the MAP sensor in the upper plenum. You need to remove the MAP sensor by turning it ¼- turn while pushing down. Remove the sensor and the PCV should be under that. Reach in with needle nose pliers to grab it.
REMOVAL PROCEDURE: Remove the injector sight shield from the fuel rail and intake. Remove the MAP sensor. Use a 16 mm socket to press the access cover down and rotate 1/4 turn counterclockwise. Remove the access cover. Remove the PCV valve and the O-ring from the intake manifold.
INSTALLATION PROCEDURE: Install the crankcase ventilation valve ; replace the O-ring if necessary. Install the access cover. Install the MAP sensor. Install the sight shield.
From: http://autorepair.about.com/library/a/1a/bl338a.htm

Hello, From what I have read it is down at the compressor and you may have to go under the car to connect to it. One article says it is on a bottom compressor line and another says its on top of the compressor.

Just when I thought they might bring back the sight glass on the A/C, they move the A/C fittings.

Check brake system. Resurface brake rotors. Replace pads. Check drums and shoes. Fush system. I use cross drilled rotors and carbon fiber pads. Stop in a hurry. Some Suburbans (94 and up) have slow ABS units that take their time to allow brakes to activate.

What age? What Mileage?

Brake hoses go bad and either prevent brakes from operating or prevent them from pulling back after being applied. Had this problem too.

Also check for vaccuum leaks. TBI engines had a loose metal tube under the TBI unit. I had a vaccuum leak and had to tighten my tube 6 times @ 1/4 turn each. Solved problem.

Try to use some liquid around vaccuum hoses and see if idle changes. Non TBI engines have plastic intake issues.

Check check valve in vaccuum booster. My was bad too.

Molded hose neeed to be replaced. I used two hoses and a brake booster filter in the HELP section to make the 90 degree turn from the hard line to the check valve.

93 Suburban 2WD. Runs great now. 16 mpg city.

Transmission modulator? The 99 taurus transmission (AX4N) doesn't have one. What is you problem that you have? I can likely help.

did you have the charging system checked ?, it could be the Altenator is not charging the battery and needs to be replaced or serviced..

The heat is controled by a control valve installed in one of the heater hoses. It normally is controled by eather a vaccuum line or a cable coming from inside the truck at the dash where you slide the hot to cold adjustment.Find the valve under the hood at the hose,have someone move the control inside the truck.If its vaccuum you can pull off the hose and see if you have vac.If its a cable you should se it move.