All of a sudden van throwing 18 codes??
My Chevy venture about a month ago overheated, cracked radiator. I replaced radiator and traced the problem. It had to be temp sensor, so I replaced it as well. After starting it up it started making this tapping sound in rear of engine and threw 18 codes. One is a cylinder 4 misfire, majority of rest seem to be sensors (throttle position, mass air, O2, etc.) It seems unlikely all of a sudden all my sensors went out. I'm a beginner at fixing my own vehicle simply because I have no choice at this point, but wondering if it could be something else. I do not have a multi meter, but do have a voltage detector and wires are all testing good. Also I can only drive it till warm, then has acceleration issue (slow and bucks a bit). If hold speed no issues. If I turn on a/c while driving, engine overworks and it dies P.s. still overheats. Fan will not cut on when hot