White Smoke after new fuel pump fitted.

[xtrjeff]

Hi all, it has been a while since i posted anything, as all has been good with my F6 1100cc van.

Recently fitted a new mechanical Fuel pump as there was a starting issue and i noticed fuel spitting out of a little hole on top of the fuel pump (see picture). I assumed this was a pressure relief system of some sort and thought the pump was coming to the end of it’s life.

So ordered a new one.
Now installed, but can only get the engine to run with full choke, and obviously high revs, but the moment i try to push the choke in ! The engine immediately stops (have tried pumping the throttle to over ride the choke, but it is almost impossible to keep it running; also a lot of White smoke billowing out of exhaust.

There was a 50% - 50% chance i had accidentally put two stroke fuel in the fuel tank as i was also messing around with my wife's (two stroke) scooter at the same time.

So i have drained the fuel tank and replaced with fresh fuel (+ Wynn’s lead additive;-) but still getting the same white smoke and will only kind of run on high revs with full choke and with tons of white smoke from the exhaust.

Any ideas would be most appreciated guys.
Thanks guys.
Jeff
(My F6 is using the standard 28IF Carburettor, still using “Points and a Condenser in the distributor “)

 

[André4Renaults]

Could the white smoke be oil that's seeped past the gasket between the engine block and the pump? Maybe the gasket's leaking or is damaged in some way? Was there a block between the pump and the engine body that Wes of a different thickness to the original? if oil's seepng into the fuel somehow it might explain why you need the choke out to keep the engine running, as the mixture will be adversely affected by this. Try running the engine with a separate fuel feed, avoiding the fuel pump (perhaps from a container) and if it runs properly, then the fault lies in the pump (or its fitting) somehow.

These are just a few thoughts which might help!

 

[xtrjeff]

Thanks for this i will try running from a separate fuel container and let you know.

 

[jcarruthers2]

Hi

The incorrect fuel would explain the smoky emissions. The type of fuel pump you have, has an internal actuating lever which comes into contact with a short steel rod which sits in the engine block which helps the fuel pump operate. This rod is loose fitting. The rod can sometimes fall out when removing the old fuel pump. If you are unaware of the set up prior to removing the pump, it is possible for the rod to fall out, fit a new pump and be completely unaware of it's existence.

In addition, there are some poor quality aftermarket fuel pumps on the market. The one in the image does not look like an original. Which make is it? Aim to fit a good quality pump such as a Sofabex or Valeo pump.

 

[xtrjeff]

Hi thanks for your help, I am trying to bye- pass the fuel pump 1st (as Andre suggests) to see if oil is getting into the fuel, I hope i don't have to remove the fuel pump again as it was a real pain to work on, access to the side of the pump to connect the fuel line’s back on, is very tight for space.