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there is no distributor cap nor distributor
gmac05062023a
Which solenoid? BOB
Solenoid
Remove the grill
The head has to be removed on the 1993 Roadmaster to get to the gasket. You will need to remove the intake, exhaust manifold, and valve cover then unbolt the head to remove it. Check the head for warpage while it is removed.
Oxygen SensorOxygen Sensor Location
under the driver door is the filter. keep the attachmen nut tight, use two open-end wrenches to loosen the gas line. do not remove them after you loosen them or gas will drench your face. loosen the nut, make sure that when you replace it the intake is pointed the right way.
Bottom of engine, inside the oil pan.
Remove the fuel tank to gain access to it.
I have used regular "87" octane gas in my 1993 Buick Roadmaster for 7 years and it runs like a top. I don't know the gas mileage as my odometer doesn't work, but it seems to be OK.
flush the heater core in both directions with water