Hi, I am new to the forum and this is my first post. I recently purchased a 1987 Camaro Iroc 5.7 TPI with a 700R4 transmission sand 73000 miles. Everything on it is original. Never been modified in any way. I purchased it in february and drove it home (about 50 miles). Everything went fine. I have since changed out the tranny fluid and rear end fluid. It has always had no issue starting or anything of that sort. When I started it up to get it up off the ramps for the transmission fluid change today and out for my first real drive, I let go of holding the key to the starting position about a half second short and had to try it again and it had issues starting. I drove it about 15 miles and parked it. No issues. I took it out on the highway and about 10 minutes later i started to smell fuel. Upon getting to my destination I noticed there was fuel pouring out of the evap canister. I shut the car off and it didn't slow down. I quickly headed home. Anytime i slowed down i would leave a large puddle under my car. When i got to my house i shut the car off and it was still pouring out. I unscrewed the fuel tank cap and it released a lot of pressure/vacuum. (not sure which way the air was headed). Started it back up and drove it 1 minute, and had the same issue. Releasing the pressure from the fuel tank made it stop again.

I am thinking it may be the canister purge valve as that was the only line going into the canister that appeared to be wet with fuel. Is there any trouble shooting I can do before I just start replacing parts?