Hey everyone! Please help sometimes my Mazda runs great others I want to drive it off a cliff. When it runs bad the only difference is it vibrates under acceleration and acceleration is pretty much cut in half... other times it’s surprisingly fast sounds great, 0 vibration. My car is bipolar literally feels like 2 different cars it’s driving me insane. It’s a 04 with 2.3. I’ve been to shops they did nothing but create more problems for me to fix. Mods are cold air intake, intake manifold, exhaust. Also hear what may be a vacuum leak. Whining noise. I’ve done vcg And egr is unplugged that seemed to help for a day or 2 then back to running like trash. Change oil good for 2 days then back to the dump. It’s infuriating. So thanks for reading and if you could help it would be greatly appreciated.