engine stuttering, and cuts off when a/c turned on
Hey guys, I own a 2000 ford focus LX with the SOHC engine, and just last weekend, I finally got a/c back in my car, we had to replace the 2 a/c lines from the firewall, the accumulator, and the compressor, all brand new. The a/c was nice and ice cold, but just today in the evening [4 full days after the install] I get into my car after class, and its stuttering and the engine is shaking extra hard, with low rpm, and a voltage level of 13.95-14.01, with a slight smell of gas. Trying to back out of the parking spot resulted in heavier stuttering and shaking and half the time, causing the engine to die on me. When I turn on my a/c regardless of the fact while in park, i hear a *click* and my engine just cuts off. Turns out, after AAA checked it out before giving me a tow back home, the a/c clutch is locked up and causing the serp belt to slow down/stop and cutting off the engine.
My question is, what could possibly cause a new a/c compressor with clutch, to go bad and lock up, within a week, and cause my engine stuttering issues. As earlier today it was perfectly fine until i came back to my car 8 hours later. Any help asap would be great!!