Thread: Upper Intake Manifold Exploded and Started on Fire

So I hadn't started my 01 GP in a couple months. I put a battery in it one night and went to crank it over and there was a huge bang and then I saw fire under the hood. Ran and grabbed my fire extinguisher and put the fire out and this is what I was left with.


So after doing some digging on the internet I still am not sure exactly what cause this to happen. Most people point to the fuel pressure regulator but I don't understand how the fuel/air mix inside the intake would have ignited even if the fuel pressure regulator is bad. I have a new dorman replacement kit for the upper intake but I really dont want to put it on just to have the same thing happen.

Thanks for any help