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Re: Performance Upgrades V70-XC70 1998

posted by  someone claiming to be Gordon on  Mon Nov 13 14:16 CST 2000 [RELATED]

Hi Mike,

Occasionally at idle, the revs will momentarily drop 200-300 RPM; there is a sense that it just stumbled for a second.

Other times, when driving at a steady speed (freeway or town), there is just a brief hesitation, as if a cylinder missed. At speed, you don't see the RPM's drop.

This happens 2-6 times a day, weather doesn't matter. I always use Shell or Texaco or Chevron premium fuel, none of which seem to affect the skip and dip.

These were exactly the symptoms the original ECU had, and they were fixed when Volvo reflashed it with updated software.

I sent my stock chip back to Wetterauer and they read the code on it and reprogrammed a new chip based on my reflashed stock chip, but the car wouldn't even start with that new chip, so I am still using the chip with the stumble. As I said, more of an annoyance than a major problem.





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