ok heres the problem, when i turn my lights on the temp gauge goes up and when i shut them off the temp goes down, it doesent go all the way to the red but it gets pretty close, any ideas on how to fix this

 

bump

 

check ur grounds on your dash.

 

i have the same problem. Im in the prosses of checking grounds under the dash. But in the mean time try putting a small wire from the neg side of the battery to one of the 10mm in the core support. I knw its werid but worked for me

 

possible air in system

 

as mentioned before check all your grounds to the temp gauge and to temp sensor possible cross short in wires when you turn your lights on the gauge reads it as if the sensor is putting out voltage . possible rear of dash sense it only goes half way its less than 12v dash if it was getting a 12 signal it would go all the way into red.

 

Clean contacts/ dielectric grease.. IMO had the same prob

 

I had same problem before also. Grounds. It was my ground wire to the valve cover. I added extra grounds. Haven't had a problem since.

 

If it's electrical related on a honda, it's very likely a ground.

Old cars+corrosion=mucho problemo.

 

well thanks to everyone for the help, well this is what i did, i cleaned up all grounds in the engine, while i was there i changed the alternator cause it was going bad, i started it up and bang problem gone, and now my system doesn't turn off on me and my lights are alot brighter, also i had a problem that i forgot to post, before all of this i usto get a code 17 which is the viss sensor, but my speedo still work, but now i dont even get the cell anymore, could all these problems come from a bad alternator? well im very happy now, my si is running good again, so thanks to everyone

 

It could be a bad alternator. They can do funny things as well. But more likely it was your grounds.