The gas millage could be a lot of things.
But the clue of the grass catching on fire is a big one.
The grass probably caught fire from the catalytic converter being very hot, and possibly even glowing.
That happens when it's trying to get rid of unburned fuel in the exhaust.
So you've got all this fuel going in the engine, but not being burnt.
That makes me suspect a problem with the ignition system.
Tuesday, December 9th, 2008 AT 4:18 PM