Aside from the obvious checking the oil level, Some vehicles have an oil sender that plugs in near the filter. Check for any sensors in the area and make sure they are connected properly.
SOURCE: Replace heater core in 1988 Ford Ranger
allow the system to cool down
take radiator cap loose to release pressure
once pressure is released tighten cap
loosen clamps on the heater hoses in the engine compartment on the pass. side of firewall.
plug or cap off the heater core tubes to prevent spillage when you pull it into the truck
place a trash bag on floorboard in case spillage occurs
remove the five screws holding the heatre core access cover, three on top and two on bottom
carefully pull heater core back and down and remove it from the dash
install is reverse
Hope this helps
SOURCE: 97 ford ranger/check eng. light on/P1443 DTC
P1143 Air assist control valve range/performance
Could Be your mass air flow sensor. Start there.
SOURCE: 1988 ford ranger 4x4. Push button for on the fly
That would be the actulator on the transfer case. More than likely it needs replaced. Check for good connection at the plug on the tranfer case.
SOURCE: what is timing gear setting diagram, for a 1988 2.3L ford Ranger
i have yet to figure out how to transfer pictures on my computer, you can go to either the Dayco or gates belt web sight for these pictures.
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