The 1988 pajero is set to idle fast at start up until the engine has warmed up. Then the idle should drop within 800 RPM range.
my 1988 4ws Honda prelude idles low at 600 rpm
a pajero is from japan.
It could be a dirty air filter or a dirty throttle body.
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Carb.? Float sticking? Rebuild or replace
a third gen pajero is about 4800ibs
check for unhooked vacuum lines
buy a new one
Mitsubishi Pajero was created in 1982.
Mitsubishi Pajero iO was created in 1998.
Mitsubishi Pajero Mini was created in 1994.
Riding Fast - 1988 was released on: USA: 18 August 1988 (video premiere)