Working Class BJ40 (1 Viewer)

[lostmarbles]

Thanks Tom.

The technician noted that my air cleaner seems to be restricting the airflow more than it should. They tried revving the engine with and without the air cleaner connected, I myself never revved it that hard, I was cringing at the sound and dreading at the thought that it might blow up any second. But I was really surprised and impressed that it held its own. I noticed increased smoke at really high revvs (based on the sound since I don't have a tach) with the air cleaner on. So I was thinking, either replace the air cleaner with an original one for the B engine (mine I was told, not 100% sure though, was from a Mitsubishi Canter), or get an original Mitsubishi Air Cleaner element and see what happens. The one I have now is an aftermarket replacement filter for the canter that was purchased since it was readily available at that time.

Aesthetics and purity aside, I was thinking since the Canter is basically a truck and fitted with a 3.9L Diesel, doesn't that mean it should be enough for the B Engine? Just a thought before I make a purchase that can otherwise be used for other stuff for the 40.

Ted

I think any air restriction occuring at full revvs is more likely being caused by your snorkel adding length to your air intake (assuming your element isn't old and clogged and your pre-filter isn't suffering any blockage either).

But you don't normally run at those revvs anyway so I'd forget it.

I'd be concerned about your heavy fuel consumption only if you noticed black smoke during normal driving/acceleration because it seems to me your stop/start traffic is responsible for that.

I think the element off a 3.9 litre Canter should surely be good for a 2977cc B regardless of who makes it (assuming it is still a paper-element filter ... which is the best type for engine protection).

 

[Edward531]

Thanks for the info Tom. Come to think of it, the snorkel could have been responsible for when I experience a sensation of starvation of fuel and the idle goes way down after suddenly braking at high speed. I'm assuming the airflow coming in suddenly cease when I rapidly slow down (especially when I encounter heavy traffic going up an incline) thereby starving the engine of air, and dropping the rpm at idle. Usually I just give it throttle and it goes back to normal idle. I initially thought it was the fuel tank because I was less than 1/2 and the incline might have affected it, but it happened again even after a full tank. As always, I could be wrong but it may be a plausible explaination. It's hard when I have lots of unknowns in my 40 to consider. Fuel consumption is really bad here. Our '00 lancer with a 1.5L engine gets 8km to a liter on a very good day, and our 2.0L Mitsubishi Van barely gets 4Km per liter, bith of them gasoline at almost $1.5 per liter. At least diesel cost less for the 40, so if I can get 4 to 4.5km per liter, I'm happy with it. All of these involves city driving. Thanks

Ted

 

[Edward531]

Hi all,

I experienced an engine shutdown while decelerating coming to a stop. I mentioned this before, but usually it just idles below normal. But yesterday it totally died on me. I restarted with no incident afterwards. This happens usually when I accelerate and then slow down to a stop, but without a tach I can't say on which RPM. I checked my oil level this morning and its midway between Low and Full.

So, I was thinking, I read somewhere that there is a low oil shutdown but I'm not sure if my B has one. I don't want to consider the the Injection pump at this time since it was recently calibrated. The low idling happens whether the tank is full or halfway, so I guess that's not an issue also. Aside from the low oil level, I'm also suspecting the pre-fuel filter-filter I placed, it may somehow restricts the fuel flow just enough to cause the low idling.

I'm due for a tune up tomorrow so I topped of my oil today an see what happens, I hope the added oil will act as a flushing before the oil change. I'm planning on switching to fully synthetic to see if there will be a difference in overall performance.

Any inputs would be highly appreciated. Thanks.

Ted

 

[Edward531]

Bad news... After I topped of the oil, I still experienced the sudden the sudden idle drop during braking. But still not all the time.

Possible causes???

Vacuum leak, oil pump blockage???

Regards

Ted

 

[lostmarbles]

...Come to think of it, the snorkel could have been responsible for when I experience a sensation of starvation of fuel and the idle goes way down after suddenly braking at high speed. I'm assuming the airflow coming in suddenly cease when I rapidly slow down (especially when I encounter heavy traffic going up an incline) thereby starving the engine of air, and dropping the rpm at idle. Usually I just give it throttle and it goes back to normal idle. I initially thought it was the fuel tank because I was less than 1/2 and the incline might have affected it, but it happened again even after a full tank. As always, I could be wrong but it may be a plausible explaination. It's hard when I have lots of unknowns in my 40 to consider. ...Ted

...I experienced an engine shutdown while decelerating coming to a stop. I mentioned this before, but usually it just idles below normal. But yesterday it totally died on me. I restarted with no incident afterwards. This happens usually when I accelerate and then slow down to a stop, but without a tach I can't say on which RPM. I checked my oil level this morning and its midway between Low and Full.

So, I was thinking, I read somewhere that there is a low oil shutdown but I'm not sure if my B has one. I don't want to consider the the Injection pump at this time since it was recently calibrated. The low idling happens whether the tank is full or halfway, so I guess that's not an issue also. Aside from the low oil level, I'm also suspecting the pre-fuel filter-filter I placed, it may somehow restricts the fuel flow just enough to cause the low idling.

I'm due for a tune up tomorrow so I topped of my oil today an see what happens, I hope the added oil will act as a flushing before the oil change. I'm planning on switching to fully synthetic to see if there will be a difference in overall performance....Ted

Bad news... After I topped of the oil, I still experienced the sudden the sudden idle drop during braking. But still not all the time...Possible causes???...Vacuum leak, oil pump blockage???
Regards....Ted

Puzzling...I'm pretty certain air restriction wouldn't be the cause of this "engine tending to die after hard braking".

But perhaps the baffles in your sump have been removed so the oil surges away from the oil pump pickup so that a "low oil pressure cutout switch" tells your EDIC to stop your engine...

So I suggest seeing if you can find such an oil switch, disconnecting it if you do find one, and seeing if the problem disappears...

But.... Then again ... I haven't checked ... but your oil pickup is probably near the front of the sump which would stuff my theory because the oil would surge forward...

What's your present idle rpm? Maybe you can cure this by simply upping your idle rpm setting?

But your cruiser has certainly had some bodgy work done on it...

I've just replaced my RH front wheel bearings and in the process I took some photos.

So here are the photos of yours and mine with red ink around the differences I spot:




I'm pretty sure mine is completely as it's supposed to be....

 

[micdon]

Hi ted,

nice looking 40 you've got. Sorry to here it's troubling you.
Tom's right about the brakepad installation being incorrect on your truck. 1 of the spring should be on the front and 1 on the back of the pads. Also the small spring that keeps the pad to the backing plate should both be on the inside of the drum.

Michiel

 

[lostmarbles]

And has someone fitted a sway bar to the front of your cruiser Ted?

If so, how about some more photos showing the technical details of that?

 

[Edward531]

Thanks for the info guys.

We performed a change oil/Tune up last weekend and changed the engine supports while we're at it. I had the valve clearance adjusted to specs and it runs great. I didn't experience the idle/RPM drop during initial test drive so I assumed the oil was pretty dirty and somehow affected the drop in oil pressure (though I'm not sure how it is connected to the drop in RPM). However, this morning, I experienced it again, but this time it was near the end of my drive to the office compared to before when I was just 1/4 or 1/2 of my total distance. I mention this because perhaps it is affected my the engine temp. Although it didn't die down, I noticed the drop in the RPM during braking for about 25 to 30 meters coming in to a corner. Before braking I was on my third gear doing about 35 to 40 kph. I felt the increase vibration but it didn't die down even if I let off the throttle. Anyway, perhaps I would adjust the idle a bit per Tom's suggestion and see how i behaves.

On the matter of Brakes, well I am due for a brake shoe replacement and drum reface next weekend and I'll try to sort everything out. As for the sway bar, I'll take better pictures by then and see what they did. BUt I did notice that before and I just thought it was there to help minimize the body roll. I thought it came with it. I'll try removing it and see how it rides.

I have a slight backlash in the rear that I feel during shifting between gears that I'll try to sort out also, it appears it's coming from the crossjoint and not the pinion. I'll have to pull it down to be certain.

Photos to follow.

Thanks again for your inputs.

Regards.

Ted

 

[Edward531]

Hi Jim.

I suspect some sort of fuel restriction caused by "bad fuel".

The last time I experienced this it was caused by bacteria converting the diesel into filter-clogging muck. (Wasn't my vehicle.)

Perhaps change the fuel filter (even though you think it is OK) and cut open the old one to see if it was restricted by gunge.



PS. One would expect a fuel restriction to cause problems when your vehicle is attempting to use fuel at the fastest rate - like when climbing a steep gradient. But when I drove that vehicle with the fuel-bug problem it was "running rough and stalling" almost randomly.

https://forum.ih8mud.com/diesel-tec...-losing-power-rough-idle-traffic-75-bj40.html

Hey Tom, I found this thread and your post while researching on my symptoms. This suspiciously sounds like my problem. I forgot to change the fuel filter last weekend so I'll give it a go.

 

[lostmarbles]

https://forum.ih8mud.com/diesel-tec...-losing-power-rough-idle-traffic-75-bj40.html

Hey Tom, I found this thread and your post while researching on my symptoms. This suspiciously sounds like my problem. I forgot to change the fuel filter last weekend so I'll give it a go.

Good luck.

That sort of fuel problem happens a lot in tractors that are left sitting for ages and ages without use...

(My experience there was with a bus that was driven only for about 2 hours daily ... so with it's large fuel tank it would have been lucky to require refueling once every 6 months.)

It would be rare in a vehicle that experiences constant tank refills (unless you're in some region where the fuel supplier's tanks are likely to be stagnant/contaminated).

Edit.... And this makes me think... Typhoon Haiyan must have made it difficult for fuel outlets in your area to keep their tanks dry ....... Just a thought... Water sloshing around in your fuel could cause this...