this might be a stupid question but is there really an easy way to adjust your idle? i was thinking its not because doesnt the computer adjust it to the temp outside and engine temp?

i dont know just a thought i had. if ive had my truck run up to its normal temp. if it sits for a while and i start it up after its kinda warm (even like 30 mins) it will idle pretty low like 500 rpm and chugs but doesnt die. is that normal? i kinda like it when it chugs haha

thanks

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1991 Ranger 3.0 XLT