You would need to be more specific with your question. You are not providing enough information to supply a meaningful answer.
A 1997 Dodge Ram doesn't have a EGR valve.
how to replace the fuel pression regulator for a dodge ram 2500 1997 van.
The idle is automatic. If the speed is not corect then you have to fix the problem with the idle motor.
1997 van aerostar front heater blower guide
no
More likely than not, the Blower Motor Resistor Pack is defective and needs replacing.
you don't the fins and water passage way are too small or thin, it would just melt.
A Dodge Ram Van.
No.
The Dodge Caravan heater was invented in 1984 by the Dodge and Mopar companies. Since it's creation it has evolved into a much bigger and popular van.
A 1997 Ram does not have EGR.
It is in the HVAC housing, under the dash.