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rotorhead rotorhead is offline
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Join Date: Jul 2003
Location: Port Macquarie Australia
Posts: 509
My 2c

The tacho acting up is a symptom of a bad Voltage Regulator, you can check this by measuring the voltage across the battery with the engine running. If the VR has failed you will be overvolting (Should read 13.5-14.5v).

Under load you are pumping a lot of fuel into the cylinders and it requires a strong spark to ignite it. It is possible that overvolting your permatune under load is the cause.
2008 BMW 320i
2006 Mercedes ML320
2004 Mercedes ML270 cdi
1998 Porsche Boxter
1988 Porsche 930 Targa (sold)
Old 10-27-2007, 06:01 PM
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