4cyl or 6cyl its in the intake most of the time its in the upper part should have a white top on it! pop it out clean with carb and choke cleaner! most of the time when they go bad the truck will run like crap. no power,burn black smoke etc.. !! good luck!!!
Look on the back of your valve cover and you should find it.
The Idle Air Control (IAC) valve is mounted on the throttle body
1990 -1993 injected Festivas do not have a EGR valve
on the intake
im not sure on a 1990 but on my 93 civic ex 1.6 vtec the PVC valve is on the intake right under the fuel rail
There is a website called The Ranger Station that might have the fuse box diagram. Don't know the URL, but you can probably find it through Google.
the iac is on the throttle body. take the cover off of the throttle body to get to it theres 2 screws to take out for it to come off. clean off the old gasket be careful not to damage the gasket mating. and they recomend that you not use any solvent on them
It is located behind (toward the rear of truck) The oil add chamber on the passanger side valve cover. Pull the hose out of the valve cover and there you'll find the PCV Valve
autozone.com has free online manuals
There is not one. The Heater core has Full flow all the time.
where is low side valve located on a 1990 ford taurus?
Pretty sure they didn't make corvettes in 1900. Maybe in 1990.