I’m trying to pinpoint and stop an exhaust leak on my 01 ZX3. I’ve replaced the manifold gasket, the gasket between manifold and cat, the gasket between the cat and the flex pipe, and just replaced the one between the flex pipe and muffler. I’m still getting a pretty strong exhaust odor when I’m idling and I have the fan on. Doesn’t matter whether the climate control is set to warm or cool. I don’t notice it when the car is moving. Anyone else have and ideas? I’ve researched this forum and I think I’ve covered the usual suspects. Thanks!