> Surprise: a box member of a car filled with PU foam. Groan. I (novice) lit my Xterra on fire while welding on the wheel well. I was going at it and then hear

> Surprise: a box member of a car filled with PU foam. Groan. I (novice) lit my Xterra on fire while welding on the wheel well. I was going at it and then heard that "whoomph" you never want to hear, and thick white smoke started coming from under the dash. Taking a chance, I ran to grab a small fire extinguisher, pointed it up under the dash, and emptied it. The cabin was full of that nasty powder but the fire stopped, and I never did find what was on fire. All the wiring seemed to work by some miracle. But yeah, that could easily have taken the house with it. Definitely know what's behind the weld.