Not an erratic idle like a dirty throttle body gives you. That goes up and down when the AC compressor kicks on, and can send the idle down to 300-400 RPM and stall the engine out. Then it overshoots when the compressor cycles off.
death rattle. a sound produced by a person immediately preceding death, resulting from the passage of air through the mucus in the throat.
1 An example of a rattle is the sound made as dishes are unloaded from a dishwasher. 2  An example of a rattle is a child's toy that is filled with beads that clatter when the toy is shaken. An example of a rattle is the sound made as dishes are unloaded from a dishwasher. 2  An example of a rattle is a child's toy that is filled with beads that clatter when the toy is shaken.