DETAILS, FICTION AND 4AGE 20V BLACKTOP

My 4age 20V is jogging way too rich and provides black smoke within the exhaust. What i also observed is actually a vibration at 3/four throttle to WOT with about every RPM. Won't sound flywheel associated imo, whilst i had that challenge on other vehicles and it sounded unique.For those who have swapped out the OEM engine for one more powerplant,