Engine temp light?

[it's a T]

one day i was putting some power wire in my car and the + hit the vavle cover. ever since then my egine temp guage isnt working. it just sits below C as if it was before i started the car.

at the same time i messed up my idle. the car idles at 2000rpm and once warms up is between 1500-1900rpm?
plz help

 

[my_gst95]

You can fix your idle by adjusting the BISS screw, located ontop of your throttle body. Screwing it clockwise lowers the idle, counter-clockwise raises the idle.

Your engine temp sensor could be shot. try replacing it. It's located around the thermostat.

my_gst95

 

[it's a T]

i just bought a 1G tb off ebay, hoping that will fix it because it is surging, i replaced the sensor by the thermosate and no response. the clip the wire slips on is a little shorter then the stock and there might not be a good conection, not sure. the guy at the dealership said to ground the wire and if the neddle goes to hot then the gauge still works. any ideas plz let me know!