4age silvertop smoking black smoke from exhaust.

[KIPH8N]

My 4age silvertop is smoking black smoke. But not much when accelerating.
What could be the problem?

[Dell'Orto]

Leaky injector maybe, maybe its blocked?

[KIPH8N]

Leaky injector maybe, maybe its blocked?

How do i check?

[Mr Revhead]

So you nail it and over like 5k rpm it's pumping out black smoke? Thats normal.

Or is it more than that?

[sergei]

So you nail it and over like 5k rpm it's pumping out black smoke? Thats normal.

Or is it more than that?

Not if you replace injectors with blacktop ones.
I have fixed the "diesel like" smoke on about 5 AE101s by replacing injectors out of BTs (or facelift AE101, but much harder to differentiate).

And YES, BT injectors ARE different to pre-facelift ST.
preface-lift ST injectors are also different to facelift.

If you pull the injector out of pre-facelift and facelift, look at the business end you will immediately spot the difference in hole size and spacing. BT were also spaced slightly different to facelift.

Bot BT and facelift injectors work well. Prefacelift injectors are crap.

[Mr Revhead]

I fixed mine by fitting a chipped ECU

[BZG Wagon]

So you nail it and over like 5k rpm it's pumping out black smoke? Thats normal.

Agreed - I thought my BZ-T was f*cked when I bought it given the amount of smoke coming out.

Black smoke cann mean it's running rich. I hear because 4age's are highly tuned from factory, they run rich when you nail it to protect the engine from melting into a paper weight.

Should only be noticable at high revs I'd expect.

[KIPH8N]

Black smoke comes at around 3-5. So the injectors need replacing.

[sergei]

Black smoke comes at around 3-5. So the injectors need replacing.

Depends how much of black smoke: if it smokes like 2.4 Diesel Hilux towing a boat up hill - then yes.

[MAGN1T]

It means that it's broken.
If it's broken then you need to do a proper diagnosis, not just swap parts using guesswork.
As for the "leaking injector".....that only happens on US forums.
Best place to start would be to have a look at the plugs, that way you'll know if it's one cylinder running rich or all of them, you're not going to have 4 injectors break all at the same time?
Maybe pull fault codes at the same time just to rule out other possibilities.
Then you could always flow test your injectors? not hard to do if you've got a bit of imagination.

Steve

[Mr Revhead]

Is is running at normal temperature?
Test the ECU temp sensor