If the freq valve is buzzing the lamda is probably ok. If you still have bad hesitation you will have to go deeper, perhaps a problem in the secondary ignition circuit like a bad wire, plug wire not completly on, bad plug, misswired plug, bad coil, timming way off, etc. You also still cannot rule out a fuel system problem without checking the fuel pressure. That requires a gauge setup and the service manual. I do not think an alternator could cause this condition.If you have enough power to start the motor it should at least be able to run smooth for a while. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxx, dmcfrancis@xxxx wrote: > My frequency valve buzzes and my volts are fine I have a motorola for now I > want to get Rob's hi amp alternator...