I have been working on a 92 G20 van. 350 small block has tbi. Engine has 176K. Runs and sounds good during acceleration. But, at deceleration back to idle as it slows down to idle it stutters and bogs almost to a point that it dies but it continues to run. It will stutter. Apply the gas and it runs again and same results when decelerates. Seems to do it more when engine is at operating temp than when cold.
What we have done is change plugs, wire set, cap n rotor, new egr solonid, new 2 injectors for tbi. pcv valve, O2 sensor. Checked map sensor and egr valve working fine. Need suggestions.