For left field info

[Petrus]

The Pontiac Vibe was a GM sister model to the Toyota Matrix.
It was fitted with two engine options; the 1ZZ and the 2ZZ.
The Vibe has it´s own community in the US, much like the Corolla.
There are useful threads on the tuning of both engine types on there from a different perspective.

As an example: http://forums.genvibe.com/phpBB3/viewtopic.php?t=19315