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BArmand · 07-13-2008, 08:22 PM

1972 Cutlass 350 automatic. HEI. I've replaced the following: battery, alternator, voltage regulator, coil.
Under the following conditions, I have a "surging" situation taking place:
temp over 180 degrees
RPM 850
headlights and taillights on

The engine speed will fluctuate between 850 and near stall, and will continually cycle like this. Almost stalling, but coming back up to the 850 before dropping to almost stall again. If I accelerate above 850, the car is fine. And if I come to a stop and put the car in reverse when it is doing this, it stalls.

When this is happening the voltage at the battery will fluctuate between 12.85 and 13.50. the voltage at idle (700) is 13.15-13.25.
IF I disconnect the alternator, the problem stops. If I shut off the headlights, the problem stops.

Thanks in advance for any help any one can provide.

07-13-2008, 08:22 PM	#1 (permalink)
BArmand Brian Join Date: Jul 2008 Posts: 5	72 Cutlass "surging" 1972 Cutlass 350 automatic. HEI. I've replaced the following: battery, alternator, voltage regulator, coil. Under the following conditions, I have a "surging" situation taking place: temp over 180 degrees RPM 850 headlights and taillights on The engine speed will fluctuate between 850 and near stall, and will continually cycle like this. Almost stalling, but coming back up to the 850 before dropping to almost stall again. If I accelerate above 850, the car is fine. And if I come to a stop and put the car in reverse when it is doing this, it stalls. When this is happening the voltage at the battery will fluctuate between 12.85 and 13.50. the voltage at idle (700) is 13.15-13.25. IF I disconnect the alternator, the problem stops. If I shut off the headlights, the problem stops. Thanks in advance for any help any one can provide.