Originally Posted by destry
I'm removing my gas tank from a 1986 z-28 because the gas smells like varnish and the car is losing power after 1-2 miles of driving.i need someone to tell me "how do you clean the tank out and with what chemicals
The varnish can be removed w/acetone on a clean rag, by wiping through the fuel pump hole. But this has to be done very carefully so you:
don't breath the fumes
don't catch anything- including yourself- on fire
don't get it on bare skin or eyes- wear gloves and eye protection
This was the only thing that worked on my Jeep tank. It was so bad the varnish actually caused the pump to not work- stuck it like glue.
On a side note, if the engine loses performance after a few minutes/miles or driving, it sounds like it's related to going to "closed loop" operation. This is where the computer takes over and uses the O2 sensor, etc. to set the engine calibrations.
The first thing I'd do is pull the codes- even if the check engine light isn't lit.