I turned the car on today and it gave me a 550-600ish idle... I raise the idle to 900, wen finished i rev the car to about 4k and let it drop and the idle drops to 900 then gradually keeps going right back down to 650ish... And wen i turn my fogs, and or headlights on the idle drops another 150-200 rpm...I checked all vacuums, got a fresh Iacv and the positive wires for the alternator and battery are in tact.. can it be that i need a larger Positive cable from my battery to the front of the car ? or Will there be further issues if i disconnect the iacv and drive like that ?