how do you replace the transmission modulator valve on a 1989 ford mustang 2.3 efi?
to replace the transmission vacuum modulator, you need to jack up the front passengers side of the car and support it on a jack stand. before starting, apply the park brake fully.you will need a rag, an ice cream pail and a 1/4 inch drive rachet, with universal and 12 inches of extensions and a 10 mm socket to remove the modulator hold down clamp bolt which is slightly above the modulator valve. remove the vacuum hose, remove the 10 mm bolt,catch the clamp, place drain pan(ice cream pail) under the modulator to catch tranny fluid if it drips. wiggle the old leaking unit out of the bore and remove the small diameter shaft from the old unit.insert the shaft into the new unit and carefully guide the new unit into the bore, wiggling it in all the way. grab the hold down clamp in your hand, and place it in its position to hold down the modulator, this clamp goes one way and rests on the flange of the modulator to hold it in firmly. install and tighten the bolt to approximately 15 foot pounds of torque, install the vacuum hose after blowing it out from the top, remove it from the vacuum tree by the brake booster(drivers side)and blow all the tranny fluid out, and if the hose is rubbery from being saturated in fluid, replace the top part which is about a foot long. road test the vehicle, and if you have an adjustable unit, adjust the shift points to where you would like them by turning the allen screw clockwise or counterclockwise. good luck.and don't forget to check the tranny fluid level!
What tools do i need to install a drive belt in a 1996 ford windstar 3.8L engine and is the tensioner spring loaded or do i need to undo any bolts brother, you better get a manual. i think they teach a course in this at the local community college. seriously, i can't responsibly explain the procedure to you in a venue like this.
try this link: 
http://bit.ly/mitchell\_repair\_manuals\_online take this to a professional that can properly diagnose this problem, this approach you're taking is going to cause more problems and cost much more than if the problem was diagnosed prior to replacing parts.
http://repairpal.com/buick-repair-in-new-castle-delaware re-flash bios using usb stick if you can get that far.
if not reset option and steps like clearing cmos and pins.?
new mobo or try manufacturer.. May need 1 0r more coil packs replaced,or it could be what happened to my 2000 4.61 lifter expanded out and wouldnt collapse,causing the rocker arm to fall out of place and the valve could never open...try unplugging 1 coil pack at a time while running and listen for a change in the way it runs,if there isnt a change then its probably a bad coil pack,find a cylinder that runs and swap the coil packs,if no difference then its probably the valve staying shut. see owners manual. if it doesn't turn over... it can not start!!... do you mean it cranks ok .. but will not start? No friend, it isn't by the air filter. It's the unit that is connected to the intake and the air filter flex hose goes to it. This MAF is mass air flow, and there is a wire across the venture of the unit on the inside. First, purchase a can of Mass Air Flow Sensor Cleaner from an auto parts store, CRC makes this spray cleaner made special for this sensor. The sensor IS the wire that runs across the venture of the MAF. Take the MAF unit off the manifold and air line from the filter, it just bolts on, keep your fingers and anything else away from the sensor, and spray it real good with the MAF Sensor cleaner. Spray the venture also to clean the bore of the unit. Put it back together and if, in fact this MAF sensor was the problem, the cleaner spray will have taken care of the situation. only thing i can think of is to maybe reflash the firmware. did you get a replacement receiver? need to activate it? check our article above to learn how. 
 
-attdirectvcare