As the title says, my 78' and 80' Rx7's in tank fuel lines are clogged and I'm trying to find a solution before I rinse it with Muriatic acid to reseal the tank. The Muriatic acid might do the trick but i want to explore options before that. Both tanks sat for about 3 years and there was some sort of black stuff comming out of the lines in the tank and it had a build up on the bottom of the tank under the pick ups. I've tried running vinegar and baking soda mixed down the lines, letting them sit for 24-48hrs and using my air chuck to try and blow out anything. No luck. Anyone have any ideas?

 

Some guys have had their tanks boiled out at a radiator shop, others had success with the POR 15 gas tank treatment. Here's a link to another thread that has some tank cleaning info:

https://www.rx7club.com/1st-generati...there-1154788/

 

Thanks, I didn't know radiator shops would do that. I'll have to check that out.