datsunguyforlife

That's a good idea I noticed it does that at lower rpms. The voltage amp meter voices bu by simply pressing the gas slightly the meter stabilizes.

Thought that might be the case. Another question what's the advantage of the internal regulated 60 amp zx alt over day putting in a new napa 60 amp 240z alt while still maintaining the original style external voltage regulator ?? Thanks again guys! Great replies.

Hello, The Problem, indicators (blinkers) make engine rpms pulse, up and down at idle. Turning on lights, makes the fuel pump pulse too, as if too much of a draw on system. The car, 2.8 with electric fan in a 72 240z fans hooked up on relay direct to bat triggerd by accesory power, 240z alternator with standard original open back regulator, 1 amp inline fuse on yel wire to alt, inline fuse on starter to alt b+ good, fuel pump is a holley red run through the stock inline fuse. All lights and signals work fine, just pulsing with engine rpm when on? What's the culprit here? Diagnose procedure? Car drives fine, engine performs excellent, getting 14.3 at the batt, but the rpms pulse at stop with blinkers (indicator pulses) Regards.