|
I'm assuming you have a CIS car. Here's what I did when I got my '75 many years ago and it had a little rotten gas in the tank. The plunger in the fuel distributor was "sticky". The car hadn't run for years. I'm not saying this is right or wrong, but it worked for me:
- I drained everything from the tank - and did it ever stink.
- Once drained, I poured in ~quart of fresh fuel and let it drain out the tank again (to try to flush anything solid).
- I removed the fuel sender unit and looked in the tank. I was lucky and had no rust. I could see a varnish line where the fuel had sat.
- Cleaned the strainer in the bottom drain plug and reinstalled the drain plub.
- I added 2 gallons of fresh, non-ethanol supreme plus a can of SeaFoam and 4 ounces of Marvel Mystery Oil.
- I cracked the feed line at the fuel pump and made sure it had some fuel dribbling from the tank and tightened that fitting.
- I charged the battery, disconnected the CDI box, made sure the air plate was all the way down, and then ran the fuel pump to recirculate fuel through the system. I let it run for about 10 minutes without lifting the air metering plate and shut if off.
- I let it sit for a day.
- I pulled the fuel injectors and put them in jars. I ran the fuel pump another 5 minutes with the air plate down to recirc fuel. I shut off the fuel pump and raised the metering plate a couple of times. The plunger was less sticky. I repeated this a couple of times (ran fuel pump, shut off, moved air plate / plunger up/down).
- Once the plunger was free, I ran the fuel pump for a few minutes and then raised the metering plate so the injectors would squirt. I ran some fuel through the injectors and shut it off to sit for a day.
- Next day I ran the fuel pump, cycled the metering plate up/down several times until the injectors were squirting mostly OK.
- I then put things back together and tried to start the car (after putting in fresh oil). I found several other issues at that time that necessitated a full tear down. Had I not found those problems, my plan was to drain the remaining "clean out fuel" again and replace with more fresh fuel.
|