Who can I-D this movie?

[madpioneer]

Trying to figure out the title of a movie I saw as a kid. Want to see about getting it on VHS or DVD. Would love to re-live this freakshow!
Not sure the premise or story line but here are the things I remember.
Has lots of bugs that spark up and cause fires. They look like roaches from Australia or some such. One scene there is a bug in the tail pipe of a car, driver gets in to start it, bug sparks up and blows up the car.
Woman has one in her hair, bug sparks up and..you guessed it woman's hair is ablaze. Huge pit and trench in the ground where the bugs come from glowing red with fire.
At one point the bugs gather together and form letters and words on a wall to communicate with a person. One I remember they spell out "We Live"
So whats it called?