Erratic solenoid pulses while engine is running

[1994griff500]

Good evening. A question for the electrically experienced among the V8 tinkerers here. Here's the problem: lately, while the engine is running, the starter's solenoid apparently gets random little voltage pulses every now and then and tries to engage the starter into the spinning ring gear. Starter is new. Ignition switch is new. Alternator is new. Immobilizer was removed a long time ago. Ground and main power cables are new and generously sized. No 100 amp fuse. The wire from the ignition switch runs straight to the solenoid, no splices. What on earth could be causing these random voltage pulses? I'm stumped. Any ideas?

[Loubaruch]

I had a similar problem but worse, it turned out to be a faulty ignition switch that was sticking in crank mode even when the engine started so gave out an awful graunching sound. Just because you changed the ignition switch the new one could still be faulty as there is a lot of chinese crap circulating. to isolate the fault try just starting the car with +12v direct to the solenoid bypassing the ignition switch if the fault clears the ign sw is duff.