I just did a Diesel Purge on my car- it effectively got rid of the annoying engine ping I've been complaining about lately- very happy about that. However, it appears that I've somehow created a fuel leak by doing this procedure.

As my car did not have an in-line fuel filter ahead of the main one, part of the procedure was to install one- other wise I had no suction hose to put into the Diesel Purge can. So, I cut the clear plastic line leading to the hand primer pump (attached to the main filter housing in my case) and spliced in an in-line filter using 5/16" rubber hose. With this filter removed I now had a suction point for the Purge.

After sticking the suction and return hoses into the can, I started the car and there was a great spout of Diesel fuel coming up from the hose I had cut. I shut her down real quick. I assume this would have come from the "lift pump" ???

Anyway, I stuck a drill bit into this line to plug it, cranked the starter without pre-glowing, so it wouldn't start, and immediately the drill bit was blown out under the fuel pressure. So, I stuck in the next size up drill bit, and tied it to the dipstick tube, so that if it blew out, it wouldn't hit the fan. This time, it didn't blow out, and I successfully started the engine and ran through the can of Purge as per the instructions. (I even turned on the air conditioning to give the engine a bit of load- thought that would make for a better purge).

After putting everything back together, it seems I now have a fuel leak. It is dripping off the very back of the engine, like 1 drip per second, while the engine's running. With the engine off, no drip. I took the car for a long drive, to make sure all my gush of fuel had evaporated, but the drip is persisting.

So, my question- did I perhaps blow a seal on the lift pump (if that's the right name for it) by plugging it's outlet with the drill bit? That's all I can think of, because everything's staying dry around my in-line filter addition. I don't even know where the lift pump is on my engne- everything is so crowded on the IP side of my engine, I could not see where this fuel line even goes, looking from above. So where do I have to look to even find the thing?

Dave M.

1976 300D