hi everyone, gas gauge doesn't seem to work anymore, always reading empty. Its been a few months since its worked. I now go by my trip milage but its getting alittle old..... how would i go about reparing this myself? what should be my first steps?.... i'd rather do this myself than take it to someone if possible. thanks
-Kevin

 

What car do you have? I'm going to assume you have a 2nd gen RX-7.

Check the sending unit inside the gas tank. Lift up the back carpet, and the mystery material padding. On the driver's side of the trunk, you'll see a shinny metal cover with a wire coming from it. Remove the 4 screws and push the rubber dust boot down through the hole. Remove the fuel pump fuse, and start the car. After it dies, proceed to remove the pump. Unhook the sending and return fuel hoses. Now would be a good time to replace the hose clamps. Next, remove all the screws surrounding the pump assy. The screws like to strip out, so use a good quality phillips screwdriver and a hammer to get them out easily. The fuel sender is the long wire with a float at the end of it. Remove the metal cover from the sending unit, and look for holes.

Unhook the wiring harness and test the wire that is for the sending unit (I can't remember the color(s)). As you move the float up, the resistance should decrease. If all is well, then I'd check the gauge next.

 

i have a 3rd gen, sorry for not posting that. is it any different for the 3rd gen? thanks for ur help so far black sunshine
-Kevin

 

should be a similar setup; a pump/sending unit assembly in the tank. I'm not sure if the 3rd gen has access to the pump through the trunk like the second gen does. You can check a Haynes Manual if you have one. Or you can go to www.iluvmyrx7.com and click on things to read under the 3rd gen section. They have the factory service manual in .PDF format.

 

ok thanks guys!