early today my car wouldnt even start do to the fact that i had forgot to tighten the thermostat ground i tightend that up and it fired up but reved to about 3000 rpm and wouldnt go down, so i looked at the spark plug wires and they where mixed up i put em on right then started the car now it stil runs like shit but it idles up and down the rpms go crazy im not to sure what to look for now? any imput or help would be awesome