I have a 04 Lighting with only 63900 miles on it. I changed the oil and fuel filter Sunday. It was breaking up under full boost before so I wanted to see if it was fixed. Took it out for a good run and everything was fine. Tuesday, it sounded like it was popping for a second after letting off after full boost. Everything else was great. Idle was great, cruising around was much better. Today, I thought I heard something at start up. I went to the store and all was good. When I left I had to get on it a little, but not hard. When I let off, I heard the dreaded sound that is like the clattering of diesel pistons for about a second and a half. I hope I am wrong, but what do you guys thinks?

 

its sad you had what you describe as a misfire or detonation and continued to romp on the throttle...



as far as what actually happened, I have no idea BUT if I were you, I'd start with a spark plug change and go from there

 

Full boost..? How exactly did you acquire full boost? Violently or organically? That could tell us a lot.