Hi Everyone,
Been stumped for a while with a recent gauge issue on my '72 Challenger 318/A-904-LA I've been trying to solve and am looking for some help on possible causes.
Basically, the fuel, temperature, and oil pressure gauges on my Rallye dash all die out/lose power when the engine is at idle, e.g. at the stoplight, and the electrical system is under heavy load, e.g. headlights, heater, rear defogger, brakes lamps all on at the same time. The gauges all come back to life once I accelerate and the RPMs increase. Gauges die out again when I come to a stop and the cycle continues. Nothing else seems to be affected by this issue. I checked the battery at the battery terminals with the engine off and it's a little over 12 volts. With the engine running at idle, voltage at the battery terminals is around 13.4-13.5 volts. I also just replaced the voltage regulator at the firewall to no avail. I'm thinking the cause could either be the alternator since the voltage at idle is under 14 volts (alternator is a Mopar re-manufactured, 60 AMP unit, circa 1995). Or is it possible the instrument panel voltage limiter, a solid state instrument panel voltage limiter from Real Time Engineering, could be the culprit?
Thoughts? Ideas?
