You can adjust the idle by removing the plastic splash guard right at the throttle cable and just turn the screw to increase or decrease idle.
The 1989 Chevrolet S 10 pickup idle control valve is located on the side of the engine. You will find the valve below the fuel injector pump.
on the side of the throttle body.
Have to take off the head, it's there.
It is in the valve cover.
The 1989 Mercury Sable 3.0 liter engine EGR valve is located on the firewall. The valve will be on the passenger side of the firewall.
Mine's located on the passinger side at the firewall.
The pcv valve on a 1989 Camaro is located in the top of the valve cover. It plugs into a rubber grommet and is easily replaceable.
just tighten it snuggly .it will be fine as long as there is all the bolts in it
where is the EGR valve on a 1989 mazda b2200
On your 1989 MERCURY TOPAZ, the BACK-UP LIGHT SWITCH is: UNDER HOOD, DRIVER SIDE, LOWER ENGINE AREA, MOUNTED ON TOP OF TRANSMISSION
Not sure about the 1989, but 1990-1993 it goes into the valve cover. Look for a hose running to the valve cover and the PCV valve should be what is at the end of it pushed into the valve cover.
remove cowling it is on the passenger side valve cover