2003 Blazer xtreme (4.3 - 6 cylinder). I bought this about 4 months ago. Been slowly going through it and fixing problems that the previous owner just let go. It did have a check engine light but that was related to the previous owner removed the cat converter. Replaced that and a O2 sensor and been check engine light free for months.
I noticed that the engine isn't running smooth. Shakes even a little. At idle after warmed up you can really notice it. Also noticed the fuel mileage sucks. I go about 100 miles in 4 days and go through almost between half a tank and 3/4s. So I am down to about a quarter tank for 100-120 miles.
I am going to replace plugs and wires, cap etc... but what else could it possibly be? Before I dump money throwing parts at it. No codes being thrown....
ALSO - is the evaporator drain just a tiny hole about the size of a quarter inch at the bottom? No hose? I am leaking on my passenger floor and that is the only hole I can see... and doesn't seem to be obstructed.