Oil & Fuel heavy smoke

[sbp30]

I have a bx23, with a severe smoking problem. Already have swapped injectors, also if i unhook the #3 injector it quits. Tried unhooking the return but same outcome, heavy smoke.

Im thinking injection pump.

 

[leonz]

I have a bx23, with a severe smoking problem. Already have swapped injectors, also if i unhook the #3 injector it quits. Tried unhooking the return but same outcome.

Im thinking injection pump.

Now wait a minute I thought this varmint was a direct injection 3 cylinder engine?

You have a bad injector allowing too much fuel into the number three cylinder.


Leonz

 

[DiezNutz]

Now wait a minute I thought this varmint was a direct injection 3 cylinder engine?

I thought this one was still indirect TVCS, but I could be wrong.
But what would that have to do with anything? Don't the direct injection engines still use a mechanical injection pump? Direct refers to the combustion chamber and injector design, not the pump technology used.

 

[sbp30]

Yes it is a 3 cylinder. It has a inline injector pump (p-pump if you are a cummins person).

It seems like the pump is injecting #3 heavily. No matter if i change the injectors around. If you disable #3 no smoke, of course it runs badly.

 

[sbp30]

pulled pump off, will post outcome of autopsy.

 

[dodge man]

As far as I know, they are indirect injection.

 

[oldnslo]

Could you have a compression issue on #3 Vs a bad injector?

Roy

 

[art]

I'd think that something is wrong in the three hole!!! Injectors are set to spray at a certain pressure, they also will carry a minimum pressure just below the blow pressure and I've not seen a injector pump through to much pressure to one hole before.

 

[kuboman]

It is quite possible that the delivery valve for #3 has stuck open delivering full fuel all the time. Poor compression would not produce large amounts of black smoke.

 

[DiezNutz]

Poor compression would not produce large amounts of black smoke.

Right, and considering this:

If you disable #3 no smoke, of course it runs badly.

So #3 is making compression.

 

[SPYDERLK]

It is quite possible that the delivery valve for #3 has stuck open delivering full fuel all the time. Poor compression would not produce large amounts of black smoke.

It would clear up under full load&rpm then?? We dont have that data point. Have to wait for pump dissection I guess.
larry

 

[kuboman]

It would clear up under full load&rpm then?? We dont have that data point. Have to wait for pump dissection I guess.
larry

That does make sense for a stuck delivery valve. It is over fueling that one hole at anything but full load/rpm. Delivery valves are easy to take out and repair.