Looking for help on my 95 blazer. Code po122 comes on after the engine has been running for a while and the idle jumps up to 1200 or so rpm. Checked all voltages on the tps with a multi meter(worked fine). Replaced tps and connecter. No problem for about 3 days, and then started doing the same thing. With engine running I started checking connections, and when I jiggled the wires by the connecter the idle jumped up and down. Figured out that it was not the wires when I tapped the tps itself, it did the same thing. Replaced the brand new tps and the it ran perfectly for a week, and then went right back to doing the same thing. I can not find anything wrong now. It runs fine until engine warms up. Any suggestions???