Ok heres a new one on me. The car starts fine,idles good,at idle you can turn on lights, they flip up engine runs fine. But put the car in gear with the lights on and the engine just dies? Any suggestions? 68-351W c-4 auto,petronix ignition
I'll second the idea of a major vacuum leak. The leak may not be just in your headlight vacuum system though. I've seen a loose PCV grommet kill an engine once. Also, the biggest vacuum draw other than the PCV system is the power brakes. I'm sure that when you are putting your car into gear you're holding the brakes first, eh? Either a bad vacuum hose, bad check valve, cracked vacuum Tee on the firewall or maybe the booster took a dump. In all reality, this problem of yours should be relatively easy to track down. Keep us apprised!
do the lights stay on when the engine dies, do the high beams work? I had a problem where the lights died out when I switched the highs on....turned out to be a small area in one of the wires causing a short (when it felt like it!) because of poor wires. R & R wires - no problems since.
Well, the headlights do stay on when the engine dies. If it wa a vacume leek though wouldnt it show itself under normal situations too, or is it just becouse of the extra vacume draw of the headlights?What is the best way to track this down? I forgot to mention that any time I step on the brakes in park or neutral the Idle drops about 75 rpm