So I swapped out my cluster from my CX civic and installed one from an ex or lx, I'm not sure.. (Picked it up used) Everything seemed to be going ok until I noticed that the Fuel gauge said I had a full tank (knowing my car had half from the CX cluster reading) and the engine temp gauge was saying that my car was overheating (Past H, which was weird because I got a normal reading (in the middle) from the CX cluster) I swapped back to the stock CX one and everything seemed to be normal. Anyone know whats going on with the other cluster??
Thanks in Advance..

 

just get another cluster, it won't be worth your time nor effort to fix another stock one.

 

I would but these are so hard to come by here in IL.. Plus the CX cluster didn't come with a Tach.

 

look on ebay man

 

Yes, I know exactly what's going on, but you won't like the answer. I had the same problem when I removed the temp/fuel cluster, then put it back in. The fuel side just had a bad ground, so check that first (one of three screws at the back of the fuel gauge side). Hopefully, that's all it is.

However, ....... in my case, when I screwed my coolant gauge back in, I tightened the screws up, but found that one of them (the ground screw - at the top) would spin freely. Turns out the screw holder was cracked (probably due to age), didn't hold the screw fast, letting it spin -- which tore the tiny hair-sized wire that grounds the sensor.

It's fixable, with a little ingenuity and some precision soldering work. Took me a few hours (AFTER I diagnosed the problem) to fix. I took a small piece of stiff tin (1-2mm thick), wedged it between the screw-holder contact and its plastic brace (you'll see when you look at it), bent it up, and VERY CAREFULLY soldered the connection with the tiny hair-sized wire emerging from the sensor. You barely have any room to work there. You need a very steady hand and lots of patience. But, it is fixable, AFAIK. I then used my tin snips to cut it to size so the metal cup that sits on top fit snugly again. Watch that your tin brace does not come in contact with the wrapped wires.

Coles notes: Check the grounds for the temp and fuel, if that doesn't fix the prob, check all the connections, especially for the little hair-thin sized wires that form the wiring for the temp and fuel sensors.