Does bio = more smoke??

[Paco]

I recently made the switch to bio (B99) and I have noticed more smoke on start-up regardless of the ambient temp. Is this common? I have done some searching and found some threads that mentioned checking and changing bad glow plugs. Prior to the switch I would experience some smoke about 10 seconds after starting at which time she would run a little rough until warmed up. I am planning to check the glow plugs as soon as I get a chance and replace if necessary. For those who are running bio did you experience more start-up smoke after the switch? Is there anything to do about it?

Thanks

[roscoFJ73]

The color of the smoke is all important.

[Paco]

I believe it was white smoke in both cases but I will double check this morning.

[T.Stanford]

Hi Paco, I run B20 in my 85 BJ60 and my 90Hdj81 with no "additional" smoke on start-up. One thing that I've noticed however(outside the issue of bio) is my BJ can't be started smoothly without the cloud show and associated roughness unless you wait at least 5-10 seconds AFTER the glow light goes out (with the key still on). The glows stay on well after the light goes out. Hope this helps. Tony

[Paco]

Thanks for the tip on waiting. Is your glow on a timer? Mine will stay on as long as I have the key turned back into position. I usually hold about 20 to 25 sec if it is cold in the morning. Today was no exception to the "cloud show". I did look to check the color and it was more blue than white. She starts right up and runs perfect for 5 - 10 sec before the cloud and rough running starts. After a ten minute drive and stop there is no cloud or rough running - starts right back up perfect.

[Jan-78FJ40]

Originally Posted by Paco

I recently made the switch to bio (B99) and I have noticed more smoke on start-up regardless of the ambient temp. Is this common? I have done some searching and found some threads that mentioned checking and changing bad glow plugs. Prior to the switch I would experience some smoke about 10 seconds after starting at which time she would run a little rough until warmed up. I am planning to check the glow plugs as soon as I get a chance and replace if necessary. For those who are running bio did you experience more start-up smoke after the switch? Is there anything to do about it?

Thanks

for me the answer is a clear YES.
when I run the HJ60 on B99, it starts harder, and smokes a lot more (white), no matter how warm it is. my glow plugs are brand new. I have not changed the injectors yet.
Once it is warmed up it runs just perfect.
j

[Diescipel]

I double glow at just about any temperature on first starts and that prevent most smoke at start up. B99 with plugs less than a year old.

B

[Paco]

So I did a triple glow this morning and it reduced the blue smoke slightly, but it was not as cold either. Hopefully this weekend I will have time to check the resistance on my plugs to see if I need new ones.

[Grease Cruiser]

Originally Posted by Jan-78FJ40

for me the answer is a clear YES.
when I run the HJ60 on B99, it starts harder, and smokes a lot more (white), no matter how warm it is. my glow plugs are brand new. I have not changed the injectors yet.
Once it is warmed up it runs just perfect.
j

Ditto here. It's just the way it is.
Also, make sure you change your filter after running a tank on higher percentages of bio-diesel. I learned the hard way on the way back from Moab.

[ylexot]

blue smoke doesn't sound too much like a fuel problem, but burning engine oil.

I run both B99 and B20 in my rig, depending on which station I'm closer to when I need to fill up, and occasionally dino-grease when I'm away from home. I haven't noticed any change in smoke with fuel. I definitely get a cloud of white/grey smoke and rough running if I haven't adequately warmed the plugs.

After the engine is warm I don't even bother with the glows on restart. No smoke and smooth start.

One thing I do notice, is the engine is quite a bit quieter on B99 vs dino. A very welcome benefit.

x2 on the fuel filter!!! 5 minutes and $5 saves a lot of hassle.