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jmshepard's Avatar
 
Join Date: Oct 2004
Location: NC
Posts: 763
Battery Voltage Spike

I have been tuning the MegaSquirt Fuel Injection in my 911SC over the past few weeks. In the data log I have noticed an anomaly in the battery voltage data. The data indicates that the battery voltage will momentarily and at random, spike to approximately 17 volts. The spike is only a few milliseconds in duration. This data was gathered during the day without any lights, radio or other ancillary systems drawing power. The FI power is coming from a hot lead on the auxiliary fuse panel in the engine compartment. The momentary spike causes an excursion of the injector pulse width and a "miss" in the engine.

Could this voltage spike be an indication of a voltage regulator going south or should I be looking in other areas?

Thanks,
Jim S.

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2009 Cayman
Old 08-21-2008, 04:55 PM
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MiamiTurbo
 
Join Date: Aug 2004
Location: Miami
Posts: 412
Change the regulator.

Thats the first warning! Change the reg ASAP! Ask me how I know?
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Old 08-21-2008, 05:41 PM
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Join Date: Oct 2004
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thanks, I'm on it.

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I say we take off, and nuke the site from orbit. It's the only way to be sure.

2009 Cayman
Old 08-21-2008, 05:44 PM
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