"pressure sensors for testing grill blocks?"
What you are testing for is radiator air flow. So, why not cut out the middleman and just measure the coolant water temp?
![](http://i46.photobucket.com/albums/f147/Xringer/CRV/SG2.jpg)
It works for me. And one of the trip meter parameters you can display is the
max water temp for your trip. When I don't get stuck in traffic, it's always
under 195deg. Meaning the (200deg) fan didn't come on..
Cheers,
Rich