I bought a 1995 580 efi. When the machine is idling and you give it gas the rpms slowly rise, it hesatates. The tank has been flushed, throttle bodies cleaned, fuel pump and pressure regulator test ok, charging system is ok. However I get a code 14 from the ECU, (bad coolant temp sensor). They get $66.00 for the thing. Is there any way I can test it to be sure? It only has one wire plugging into it. How can you clear the stored codes?