If your alternator is dropping low enough in voltage to turn on the battery, then that's to low. At that level you can go below battery voltage and the car can die, and the FP will slow down to a crawl, lights will dim and fan's will slow down. I would increase the idle to 900 RPM's no matter what alternator your running and see what happens. Also, turn off any major current draw items such as the cooling fans and the blower motor and lights and see what happens. But, either the alternator could have a bad regulator, but most likely it's not because it works fine with a little more RPM's . This is why we turn a smaller pulley for our alternators to raise the TOV ( Turn on voltage ) at lower RPM's.The cars really need to be idling at about 900 RPM's to generate a little voltage and current and be at TOV or above.. John Hervey -----Original Message----- From: Shannon Yocom [mailto:ssdelorean@xxxx] Sent: Thursday, November 13, 2003 12:34 PM To: DMC - DML News Post'n Subject: [DML] RE: idle flux / stall / pickup line? No battery light unless it actually stalls. Mostly it just does the drop/rev/flicker bit. I still havent installed your new fuel tank baffle assemby. I guess that's next on my list of "to-dos" unless my problem is something else besides a faulty pickup line. Shannon Y 16506 ------ Message: 21 Date: Wed, 12 Nov 2003 20:29:51 -0800 From: "John Hervey" <john@xxxx> Subject: RE: idle flux / stall / pickup line? Shannon, What is happening to the electrical side when this happens. The fuel pump is an electric motor. When Your idling and the voltage drops the fuel pump will slow down and your fuel pressure will drop and go down also. It may look like a pump/fuel problem, but you said it was ok when you race up the engine a little. Then voltage also goes up from the alternator and your ok. Is the battery light coming on. If so then the voltage is dropping so low the car thinks you have shut it off. John Hervey www.specialTauto.com >>snip<< __________________________________ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.com/whatsnewfree To address comments privately to the moderating team, please address: moderators@xxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/