Injector pump problems

[Wedg3]

The only part I don't check is my fuel pump. I have a bj40 1979 with a B motor inside 24volts Canadien.

OK Then I go with what is done

- B motor rebuild (All rebuild... really all)
- Injector rebuild
- Air in the fuel line check
- Timing gear ok
- Primer pump new
- Valve clearence ok
- cylinder pressur 330-340 psi

The problem is when I accelerate... but not heavie acceleration. black smoke comming out. The more I accelerate the more it's smoke. I just go up a small hill and it's smoke bad black smoke. My wife always telling me that I smell diesel exaust when I stay 5 minutes near my running truck.

Do you have a tricks to see if my fuel pump have the good timming ? Do you know if you can replace a B fuel pump with a 3B fuel pump ?

if you tricks is to remove the foot from the fuel... I can't remove my foot more because I push only 1/4 of the pedal and it's smoke black.

 

[lostmarbles]

The only part I don't check is my fuel pump. I have a bj40 1979 with a B motor inside 24volts Canadien.

OK Then I go with what is done

- B motor rebuild (All rebuild... really all)
- Injector rebuild
- Air in the fuel line check
- Timing gear ok
- Primer pump new
- Valve clearence ok
- cylinder pressur 330-340 psi

The problem is when I accelerate... but not heavie acceleration. black smoke comming out. The more I accelerate the more it's smoke. I just go up a small hill and it's smoke bad black smoke. My wife always telling me that I smell diesel exaust when I stay 5 minutes near my running truck.

Do you have a tricks to see if my fuel pump have the good timming ? Do you know if you can replace a B fuel pump with a 3B fuel pump ?

if you tricks is to remove the foot from the fuel... I can't remove my foot more because I push only 1/4 of the pedal and it's smoke black.

Who refitted the injector pump (after the engine overhaul)?....

Like you, I suspect maybe the injection timing is out.

Maybe take it to a diesel injection specialist?



PS. I suspect the inline pump on a 3B (for example from a 1982 BJ42) is exactly the same as yours/mine but I'm not certain.

 

[Tapage]

mmm bkack smoke .. new fuel, oil and air filters .?

Search here in MUD for fuel screw adjustment .. and pull back a couple of turns your diesel in your IP .. just to test.

 

[canucksafari]

In addition to what Tapage says, remember that at higher elevations you are likely going to get black smoke even with a well working IP and injectors. You are going to have to drop a gear and ease back on the throttle - just accept going slow.

 

[Wedg3]

All off you telling me the same things then other post.. so I will give you more explanation.


- The timming mark of the fuel pump is at the same place.
- New Fuel Filter
- New Air filter
- New oil and oil filter

- I Live were you only see two or 3 hill... other then that it's just an inclinasion and it's smoke black running up.

- My pyro at idle is 400 degree and running at 650 degré but hard acceleration 1300 ++ degrée but remove my foot off the pedale. really Slow Acceleration is about 950 degree

- The B fuel pump, does'nt have Adjusting screw for fuel adjust.

- I'm not living in a mountain... so the outdoor pressure is normal.

- And I accept going slow... running always 50mph at 2500rpm with a 4 speed h42 ... but it's take me more then 3 minutes to go to 50mph to be sure to not smoke the other car ... really really more if i'm running up a little inclinasion. When you see 10 car in your back wishing that you turn to the next stop... it's because your not running fast.

 

[Wedg3]

The bench test for a specialist of diesel is about 110$ plus the adjusting time... 56$/h so... just to know. Do you have a small test for timming adjust ?

If I push all my fuel pump a little bit to the side of my motor... it's advance of decrease the timming ? Normaly I suppose to be at 10 degree at the timmig mark's...

I have a 30 year diesel at maybe 450 000.... 650 000 and more so if the automatic advance spring (truck's timming gear) is not enough stiff... can't it cause my trouble because it's will advance more than normal ?

 

[BEE-JAY42]

A hole your diaphram will cause overfuelling, explains most of the symptoms.

 

[Wedg3]

I forget about that.... diaphrame .. NEW .

By the way, my engine is full of power during the acceleration if the gaz is full open. (Full power... if you take in consideration that I have a Landcruiser... not a V8)

 

[Tapage]

- My pyro at idle is 400 degree and running at 650 degré but hard acceleration 1300 ++ degrée but remove my foot off the pedale. really Slow Acceleration is about 950 degree

it's sound too much diesel to me .. I'm not sure how to adjust the fuel in a B IP .. but sound the reason to me ..

I need to push my 2H really hard to get it over 1200°F and if you do that easy .. it's clear to me ..

 

[lostmarbles]

Do you have a small test for timming adjust ?

If I push all my fuel pump a little bit to the side of my motor... it's advance of decrease the timming ? Normaly I suppose to be at 10 degree at the timmig mark's...

Here's the relevant page from the B manual that shows which way is "advance" and which way is "retard."



Sorry for the poor quality of the images.

So if you want to do this FSM test:

They suggest fitting a short length of tubing to the outlet to No. 1 injector and call it "an inspection pipe". (They say the length of the pipe should be as short as possible but yet theirs looks to be about 100mm long.)

Make sure the fuel system (as far as the IP) is properly bled (free of air) and then do as described in the image above.

 

[BEE-JAY42]

It really sounds like your governor can't detect your throttle position, this is caused by a vacuum leak (usually a leaking diaphram). Check your two sense lines from the diaphram to the throttle body, see if they have split or are loose.

 

[Wedg3]

All vacuum check, no leak... But sound like the probleme is not far from the diaphram... will study my fuel pump book to see if something wrong with vacuum

I will change vacuum line this weekend, remove the fuel pump... and check all the component near the diaphrame to be sure that all is ok. When I change the diaphrame I see that were the diaphrame is connect (don't know the name of the pieces) it's doesn't have any spring to put it back... maybe there !

 

[ohrly?]

uhm yeah there is a fuel screw.


turn it down... everything else is clearly fine since its brand new.

 

[lostmarbles]

... When I change the diaphrame I see that were the diaphrame is connect (don't know the name of the pieces) it's doesn't have any spring to put it back... maybe there !

Do you mean you're missing this spring?

 

[Wedg3]

not that spring... this one is good and have 2 shims I thinks. But were the diaphrame is connect. The long pieces. You suppose to hook it with a fishing scale... and you must read 120 g. on the scale... Read that in the book.... but not sure about it. This part can be move by hand in my pump but never return back by it self when the diaphrame is remove. Normal or not ?? will read the book a little more ... to be sure before removing it all.

 

[Wedg3]

someone can take a picture of the ajusting bolt for fuel on a B injection pump ?? 3B have one... B .... It's not a the same place !

 

[lostmarbles]

Getting back to the connection between exhaust smoke and injection timing, this is what Toyota has to say:

 

[lostmarbles]

not that spring... this one is good and have 2 shims I thinks. But were the diaphrame is connect. The long pieces. You suppose to hook it with a fishing scale... and you must read 120 g. on the scale... Read that in the book.... but not sure about it. This part can be move by hand in my pump but never return back by it self when the diaphrame is remove. Normal or not ?? will read the book a little more ... to be sure before removing it all.

Hmmm. You are pointing to "the rack".

And - Yes the sliding risistance of the rack must be less than 150g according to my FSM (at zero rpm that is - while it must be
less than 50g at 1000rpm).

I'm not sure about whether there is a spring attached to the rack though. I'll have to look into that some more.

Sounds like you are much more familiar with the insides of your injection pump than I am. (I've only ever changed the diaphragm in mine.)

someone can take a picture of the ajusting bolt for fuel on a B injection pump ?? 3B have one... B .... It's not a the same place !

I don't think there is one Wedg3.

The only fuel adjustment that I know of is on each individual plunger (that delivers the fuel to each cylinder).

You can adjust idling revvs (at the inlet manifold butterfy) and you can also adjust the "max no-load revvs" (that screw beneath the diaphragm housing) but I am not aware of a "fuel adjustment screw" as such.

 

[Wedg3]

Thanks lostmarbles !

The ''Rack'' doesn't have any résistance at 0 rpm... I will study more and more my book to know where you adjust that or were normaly this ''résistance'' is .

I test the BJ40 a little more today... I put a traileur with 2000 lbs in it... smoke just in acceleration. EGT temps 650 to 750 F . It's really just in accélération that it's smoke black and EGT go to hot !... with heavy load it's not smoke more and the EGT temp is good.

 

[Wedg3]

'' You can adjust idling revvs (at the inlet manifold butterfy) and you can also adjust the "max no-load revvs" (that screw beneath the diaphragm housing) but I am not aware of a "fuel adjustment screw" as such. ''

What is the max no load revvs ?? What that eat this things?