If its original OVP, replace it first.

After that, replace idle control valve vacuum hoses and check for vacuum leaks everywhere else -- injector seals, throttle body boot.

__________________
2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k