excess black smoke issues

[brisveganbj42]

3b - excess black smoke issues

hey guys..

trying to work through some issues to sort an excessive black smoke under load issue i've had with this 3b since I purchased it.

things i have done to date:
- swapped over injectors for reco'd injectors
- replaced governor diaphragm (found two small holes/rips in the existing one)

this was done today and i took it for a test drive tonight.. it still had a fair bit of black smoke under load but not nearly as much as it did before..

The only other outstanding issue i can think of is the fact that the edic appears to be sticking in the overfuel/start position..

i know the edic has 3 positions, and overfuels for startup.. i have noticed that it doesnt appear to be returning to the "drive" position after starting.. if the edic motor is having issues returning the rod to the drive position is there anything else i can do other than replacing the edic (i have a spare on the other 3b)..

Ive got the factory manual here.. so I'll be checking it out closer tomorrow (ie, the marks it mentions in the manual for the "drive" position).. but what do you guys think? could this be contributing to those symptoms?

normal driving doesn't produce excessive smoke.. only when you are working the engine hard.. I dont know of the fuel has been turned up at all before I received it (no seal wires on the injector pump that i can see)..

I'm running out of things to check/fix to resolve this excessive smoke issue.. so any ideas/thoughts are appreciated!

 

[ivanhoe]

hi,
overfueling seems to be the problem of blacksmoke. if you can have the normal position on the edic to try, it would give you a better idea if things are NORMAL! the edic arm can be adjusted but i would use that as a last resort. try having the edic arm stuck in normal position to diagnose your symptom.
hth,

 

[Winslow]

I just went through this with my hj60. If the arm is stuck on overfueling then that is your problem. The PO of my truck had the fuel screw adjusted all the way out, which allowed for an almost constant state of overfueling and as a result black smoke. I leaned mine out, replaced the injectors, and know everythign thing is better (minus a few HP).

 

[Garry]

If your edic motor moves, chances are that is ok. Check the relay/management box (located under dash to the left of glove box) As I've said before, a good thump on the dash can sometimes scare it back into action! Also another thing to try is dissconnect the control arm off the edic (the arm will automatically return to normal running position), and go for a test drive. If you still get the smoke, it may need adjusting.

 

[brisveganbj42]

any chance someone can post a pic of their edic in the "drive" position?

On my other 3B.. I took the arm off the edic and noticed that on the injector pump the thing it was connected to when to the over fuel position...

I'm confused as to how it works in the drive position.. I can see it in the manual where its suppose to be but i can't understand how that will work..

if i just screw in the adjusting nut that governs how far the lever can travel in teh overfuel position, would that help? It might not overfuel for start but is that such a bad thing?

Sorry this doesnt make alot of sense but I'm having trouble explaining all the bits.. ..

 

[brisveganbj42]

If your edic motor moves, chances are that is ok. Check the relay/management box (located under dash to the left of glove box) As I've said before, a good thump on the dash can sometimes scare it back into action! Also another thing to try is dissconnect the control arm off the edic (the arm will automatically return to normal running position), and go for a test drive. If you still get the smoke, it may need adjusting.

I have changed the fuel control relay over from the other bj42 (the one with the issues wouldn't shut off).. since changing it it now shuts off..
..

you mention that if you disconnect the control arm off the edic it will go to the normal running position.. but isnt the overfuel position? this is where its at normally?

 

[Garry]

Quote; if i just screw in the adjusting nut that governs how far the lever can travel in teh overfuel position, would that help? It might not overfuel for start but is that such a bad thing? end quote.

I would try that. Turn the screw clockwise a quarter turn only and test drive. This should reduce the smoke, but if you go too far, power will also reduce! Let us know how you get on.
Mark the original position of the screw, so you can put it back if needed.

 

[Kalawang]

I had a problem with heavy smoking whenever I did heavy acceleration. Somewhat embarassing on the road. I changed the air filter and the fuel filter. Surprisingly, the amount of smoke under strong or heavy acceleration reduced tremendously. It's almost time to change my opil so I'll be looking for smoke after I do that.


Kalawang

 

[brisveganbj42]

Thanks for teh suggestions so far guys...

So far I have changed the oil (probably about 2000kms ago)
changed air filter
swapped in reco'd injectors
replaced governor diaphram

talking to a few people i think i need to disconnect the connecting rod from the edic and check that the fuel adjustment screw isn't all the way out (which i think it might be)

the only other thing that has been mentioned that I havent changed is the fuel filter.. I have one at home i can try.. but my bets the edic/fuel adjustment being maxed out.

 

[brisveganbj42]

ok.. did some fiddling with the edic control arm tonight and took some pix..


heres some pics of what it looks like.. and it IS NOT going into the normal position after starting..

here is the edic in the stop position

here is mine in the run position (this is where it should be when you turn the key but it shouldnt stay there!)

and this is where it goes when you take the rod off.. (kinda in the middle, definately not as far right as when starting)

even though its hard to pick, when the control arm is off, its in the normal running position, this is less to the right than when its on the on position..

so now i just need to figure out what to do? swap edics with a known good working one? or fiddle with the current edic to get it working properly?

If i took the fuel control relay from the good working 40, you'd think that that wouldn't be causing the issue right? so i reckon my only option is to swap edics.

 

[grumpy]

BJ

Disconect your edict and take it for a drive .If it still smokes -max smoke screw -no smoke ( less ) edict , so adjust rod length .The edict controls the fuel rack and will override the governers .If it stops smoking but no power ,then someone played with the governers .Where in the rev range it lacks power will tell you where to look .There are basically 7 or more governer adjustments .

If it helps I have a known good edict .There are two different edicts for BJ's .The wiring plugs are different .

I'm in Brisbane .

grumpy

 

[brisveganbj42]

cheers grumpy..
i have a spare also..

whats teh process for swapping edics? unbolt from block and away you go?

Ive got to get some tail lights sorted (tonight) then I'll go for a test drive with the edic control arm off..

 

[grumpy]

BJ ,


Have a look at Stardotcom's question about draining the water from the block .
Edic removal is explained to ease getting to the drain in the block so that he doesn't snap it off if it's siezed .


grumpy .


P.S. How in the heck do I change the info in my avatar to let people know where I am .

 

[brisveganbj42]

hey Grumpy,

you can change your details via the "User CP" in the top menu (where the search link is).. its in the Edit Profile section..

Well I disco'd the control rod from the injector pump this arvo and went for a strap and now the amount of black smoke is minimal.. a HUGE improvement on before.. so that confirms that the issue is the fact the edic is overfueling..

I dont like your response to Stardotstar mentioning that the edic bolts could be corroded and are a karnt to get out.. at least i have one to test on first (removal from the other 3b of the known good edic motor..)

might attempt to do that tonight..

thanks for all your help guys.. its been INVALUABLE AND EXTREMELY APPRECIATED!!! if ANY of you out of towners ever make it to brisneyland, let me buy yas a beer!

 

[brisveganbj42]

well. only took about 10mins to swap edics over..

after getting the other one in i noticed that sit still only had 2 positions.. i WD40'd the electrical connections thinking it would maybe make a difference..

anyway.. with this edic the rod doesn't pull the injector to the overfuel position due to the length of the controler rod.. i could of just done this with the other edic i guess.. at least it dis-proves the edic as being the issue..

anyway.. i fiddled with the fuel adjustment screw (wound it in a tad) so there was no smoke under load.. and im happy with that at the moment..