Originally Posted by
03Merc
You have to adjust the regulator for the correct charge I believe. I'm not too smart with that yet but I did have My alternator upgraded and My tuner said He would have to adjust it for Me on the tune.
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On the stock Marauder alternator I think the voltage regulator is integral with the alternator, and is not adjustable.
The stock alternator has an overrev-disconnect clutch in the pulley. If that clutch fails you could get the symptoms you described. But in that case your voltmeter would slowly drop to a point where the car wouldn't run at all because the battery would be discharging with nothing coming from the alternator.
The surging could be an idle air control and/or a throttle position sensor going bad. I just had to replace both of those on my MM.
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Ride 1: 2003 300-A MM, black (naturally), K&N cold air, Granitelli Racing coils, Kybe shocks, Autometer "real" oil pressure and voltmeter, 14 inch front rotors and stainless lines from TCE with 6-piston Wilwood calipers and Hawk HPS pads, cryo-treated slotted rear rotors with TCE stainless lines and Hawk HPS pads, tune by Lidio, LED headlamps. Coming Soon: LED foglights, 200 Amp Alternator.
Ride 2: 2001 Kenny Brown "Panther 2" Crown Victoria, Black. K&N cold air intake to Allen Engine Development supercharger system with water-to-air intercooled Eaton MP-90 at 8 pounds. Extensive chassis bracing, Brembo 4-piston front calipers on 13 inch rotors with stainless lines. Trunk-relocated Optima Red-Top. 5000K Bi-Xenon HID's. And much, much more.