My 86 gt vert has me scratching my head. It's jerking/bucking at low rpms. The idle is also all of a sudden is wanting to bog out but then comes back up continuously. It is speed density. I switched it to maf but had more problems. Black and blue smoke and when I let the clutch out rpms would fall then stall. Changed my iac and reset my tps. New plugs and wires also. I switched it back to speed density and now idle is sweeping trying to stall out. Smells terribly of gas and started this awful jerking. Burnt about 1/4 tank of gas in about 4 miles of driving. Could it be my egr? Or bad injectors? Any help would be awesome! Thanks in advance