350tbi 90 blaze..... I replaced my plugs,wires, cap and rotor. Repaired a vaccume leak...I think its the only one. But anywhooo My idle is ruff after its all warmed up but drives perfect. If Im sitting at a light, the idle gets low like it wants to die but doesnt. When the idle stutters the oil pressure gets below 30 on the gauge??? Timing?