BJ40 Exhaust smoke

[Memphisau79]

So what did you do with the engine rebuild? New rings or cylinder hone, new liners? How many hours has it been run in? If these are shots of an initial break in I can tell you first hand it will smoke like a bugger till the rings seat. You should follow a break in procedure and not Idle that engine. Who knows, cus you've opened up this engine a whole bunch of things could be at play.

Post up some pics of your pump settings and your kill switch. Your throttle cable is suppose to be attached to the throttle plate on the intake manifold. The manual kill rod goes go the fuel control arm on the side of the pump.
Here is What the pump timing marks look like.
View attachment 1887698

So i am finally getting a chance to start going after this again! I have been away and just finished my brakes and a leak so its ready to start messing with this exhaust issue again. I have not removed the green item rod yet but there is tension holding the arm in place so it would make sense the spring behind the diaphragm is hooked up.

I replaced the diaphragm a while ago but when i started it the other day, it still smoking and idling high but can be controllled with the fuel kill switch on dash still and when driving with the kill switch set out some, exhaust smoke is nearly absent but resume when engine is idling.

The engine rebuild was just the head, and done at a professional machine shop with a good rep, they replaced the intake valves and the seats, everything else was good. The block was simply cleaned up some and new head gasket placed on it.

Where can I find that fuel pump timing mark? It looks like its just in front of the fuel pump but I'm having a hard time identifying exactly where that is in the photo. Should the two marks line up?

Any other input? thanks again and sorry I was away so long

 

[Memphisau79]

I found my timing mark this morning.

It looks pretty close but not sure how off that is, can post more photos

 

[Memphisau79]

So the error has been found and corrected, wanted to say thank you to Gerg for all his help and identifying the easily overlooked mistake that had occurred.

The previous owner (dealer in this case) had swapped the lines that go to the throttle so the throttle was wide open when idling causing the symptoms seen. I wouldnt have guessed this but it makes sense based on replacing the diaphragm and the issues of a leaky diaphragm persisting, hope this helps someone in the future.