i have a 5.3 vortec in my old jeep. The engine sat for a few years so bugs were expected. I got it to fire and idle but it's extremely rich with blue smoke billowing from the exhaust. I'm pretty sure it has fouled the new plugs already because now it won't even idle. As I said, new plugs and also new MAF. Fuel injectors are freshly rebuilt by a specialist. Any ideas?

 

Data log it, and post the results.