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mooney265 mooney265 is offline
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Join Date: Sep 2008
Location: New Orleans
Posts: 1,365
I'm having similar symptoms...

1. On initial startup my voltage remains 12.25V until I rev the engine to about 3K, then, 14.4V

2. Occasionally, when the voltage is 12.25V at startup, my tachometer reads exactly 2X the actual rpm's. So, at 1,500 actual idle, the tach is reading 3K ?? then, when I rev to 3k [6k indicated], the voltage goes up and the tach becomes accurate, again.

3. Once I get the voltage up, I don't experience these problems again, as long as the car remains running. As soon as i turn off engine and restart, I have the same problem again. However, when the engine is fully warm, it's very easy to get the voltage back to 14.4V [just a tap of the accelerator will do].

This has been going on for a couple of months... It really isn't a problem to deal with [because it's very predictable], just worried that "whatever it is" could leave me stranded????

Anyone else experience this??? - - - Oh, my alternator is new [3K miles]....

LIVN80S - - Red '79 Porsche 930 Steel Slant Nose Conversion [in 1987] w. 46k miles 3.3L; 964 Cams; K27HF @ 1.0 BAR, with Garrettson Intercooler; Rarly Zork; CIS Flowtech Fuel Head & BL-WUR.

Last edited by mooney265; 11-03-2009 at 04:35 PM..
Old 11-03-2009, 04:33 PM
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