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Engine light is not coming on. Trying to fix a rough idle problem and would the idle control valve, map sensor or the throttle body sensor throw a code if any one of them was not function correctly? Any simple way of checking them with a meter to see if they are within specs? 1997 Nissan...

Engine light is not coming on. Trying to fix a rough idle problem and would the idle control valve, map sensor or the throttle body sensor throw a code if any one of them was not function correctly? Any simple way of checking them with a meter to see if they are within specs? 1997 Nissan...

Engine light is not coming on. Trying to fix a rough idle problem and would the idle control valve, map sensor or the throttle body sensor throw a code if any one of them was not function correctly? Any simple way of checking them with a meter to see if they are within specs? 1997 Nissan...

Engine light is not coming on. Trying to fix a rough idle problem and would the idle control valve, map sensor or the throttle body sensor throw a code if any one of them was not function correctly? Any simple way of checking them with a meter to see if they are within specs? 1997 Nissan...

Engine light is not coming on. Trying to fix a rough idle problem and would the idle control valve, map sensor or the throttle body sensor throw a code if any one of them was not function correctly? Any simple way of checking them with a meter to see if they are within specs? 1997 Nissan...

Engine light is not coming on. Trying to fix a rough idle problem and would the idle control valve, map sensor or the throttle body sensor throw a code if any one of them was not function correctly? Any simple way of checking them with a meter to see if they are within specs? 1997 Nissan...

Engine light is not coming on. Trying to fix a rough idle problem and would the idle control valve, map sensor or the throttle body sensor throw a code if any one of them was not function correctly? Any simple way of checking them with a meter to see if they are within specs? 1997 Nissan...

Engine light is not coming on. Trying to fix a rough idle problem and would the idle control valve, map sensor or the throttle body sensor throw a code if any one of them was not function correctly? Any simple way of checking them with a meter to see if they are within specs? 1997 Nissan...

Engine light is not coming on. Trying to fix a rough idle problem and would the idle control valve, map sensor or the throttle body sensor throw a code if any one of them was not function correctly? Any simple way of checking them with a meter to see if they are within specs? 1997 Nissan...

Engine light is not coming on. Trying to fix a rough idle problem and would the idle control valve, map sensor or the throttle body sensor throw a code if any one of them was not function correctly? Any simple way of checking them with a meter to see if they are within specs? 1997 Nissan...

Engine light is not coming on. Trying to fix a rough idle problem and would the idle control valve, map sensor or the throttle body sensor throw a code if any one of them was not function correctly? Any simple way of checking them with a meter to see if they are within specs? 1997 Nissan...

Engine light is not coming on. Trying to fix a rough idle problem and would the idle control valve, map sensor or the throttle body sensor throw a code if any one of them was not function correctly? Any simple way of checking them with a meter to see if they are within specs? 1997 Nissan...

Engine light is not coming on. Trying to fix a rough idle problem and would the idle control valve, map sensor or the throttle body sensor throw a code if any one of them was not function correctly? Any simple way of checking them with a meter to see if they are within specs? 1997 Nissan...

Engine light is not coming on. Trying to fix a rough idle problem and would the idle control valve, map sensor or the throttle body sensor throw a code if any one of them was not function correctly? Any simple way of checking them with a meter to see if they are within specs? 1997 Nissan...

Engine light is not coming on. Trying to fix a rough idle problem and would the idle control valve, map sensor or the throttle body sensor throw a code if any one of them was not function correctly? Any simple way of checking them with a meter to see if they are within specs? 1997 Nissan...

Engine light is not coming on. Trying to fix a rough idle problem and would the idle control valve, map sensor or the throttle body sensor throw a code if any one of them was not function correctly? Any simple way of checking them with a meter to see if they are within specs? 1997 Nissan...

Engine light is not coming on. Trying to fix a rough idle problem and would the idle control valve, map sensor or the throttle body sensor throw a code if any one of them was not function correctly? Any simple way of checking them with a meter to see if they are within specs? 1997 Nissan...

Engine light is not coming on. Trying to fix a rough idle problem and would the idle control valve, map sensor or the throttle body sensor throw a code if any one of them was not function correctly? Any simple way of checking them with a meter to see if they are within specs? 1997 Nissan...

Engine light is not coming on. Trying to fix a rough idle problem and would the idle control valve, map sensor or the throttle body sensor throw a code if any one of them was not function correctly? Any simple way of checking them with a meter to see if they are within specs? 1997 Nissan...

Engine light is not coming on. Trying to fix a rough idle problem and would the idle control valve, map sensor or the throttle body sensor throw a code if any one of them was not function correctly? Any simple way of checking them with a meter to see if they are within specs? 1997 Nissan...