Is this normal?
Yesterday, while stopped in daytime traffic in my '92 SSE */c, I pressed the window DOWN switch and held it for a couple of seconds while the window already happened to be all the way down. To my surprise, the engine idled a little more rough and the boost gage needle moved up a little bit (maybe 1/16") while the window switch was pressed. I released the switch and the engine idle and boost gage needle returned to their previous conditions. I repeated this test consistently using a window DOWN switch for a window that was already down, and the window UP switch for a window that was already up. This proves that the change in engine/boost behavior was no coincidence.
Have any of you ever noticed this before? Is it normal
It seems odd to me - maybe there'* a problem with an electrical ground somewhere, or maybe my alternator isn't regulating the voltage well enough? It'* an AutoZone DuraLast Gold alternator that'* not very old, and the battery isn't very old either.
I'll try this same test with my '93 SSEi and post the results as soon as I get a chance, but my wife drives that car.
'99 Bonneville SLE, white, 112,000 miles
'02 Park Avenue Ultra, white diamond pearl, 88,000 miles