try replacing the throttle positioner relay, 1"x1"x1/4"thick(black) b top front air intake Just had same problem with my 88 aerostar. Wouldn't idle and ran rough. Mechanic replaced MAP (manifold absolute pressure) sensor for $268 and now she runs great.
how do you fix a gas guage on a 1989 ford aerostar
my aerostar 1987 v-6 3l have 1451
To fix the idle on your 1987 Ford Bronco II, start by checking and cleaning the idle air control valve (IAC) and the throttle body to ensure proper airflow. Inspect the vacuum lines for any leaks, as these can affect idle stability. Additionally, adjusting the idle speed screw on the throttle body may help, but make sure the engine is at operating temperature. If issues persist, consider checking the fuel system and ignition components, as they can also impact idle performance.
the radiotor or the cams
Take it somewhere and get somebody that knows shat they're doing to fix it.
The idle is automatic. If the speed is not corect then you have to fix the problem with the idle motor.
why does my vr commodore idle rough when at complete stop
The idle speed on a 1987 Chevy Celebrity is controlled by the engine computer, there is no way provided to adjust it.
chances your spark plug wires in wrong order happenned to me on my 92 i was given different firing orders be specific with whomever if its distributor or coil pack
Rear wheel
May be idle position sensor.
WHERE DO I PUT LUCAS TRANSMISSION FIX IN A 1992 AeroSTAR