Faithful 91 Sub surges at idle. About 192K on engine, no other problems other than surging idle.
Pulled codes indicated TPS and EGR valve so replaced tehm and plugs, plug wires, cap and rotor, timing chain and gears, and coolant temperature sensor. Have full power and better mpg now than when new (16+ mpg at 65 to
75) but it looks like the surge problem is in the electronic fuel injection. Any ideas? TIA!