Thread: 4JB Engine, black smoke.

I would say somebody has wound on some more fuel to get more power. Black smoke is excessive fuel delivery, not enough air.

This is very dangerous for diesel engines as the exhaust gas temperatures can become high enough to destroy pistons, turbochargers and cylinder heads.

There should be a tamper proof cap on the fuel enrichment screw at the rear of the pump, if you could post some pics of the pump where the fuel injector lines come out of the rear of it, we can show you the main fuel adjustment screw.

JC

Back of the pump would be more helpful....where the actual steel injector lines go in.


Here, try this;

[ame="http://www.youtube.com/watch?v=migF3qsUG6U"]Holden rodeo 2.8 td fuel screw - YouTube[/ame]

JC

I couldn't get my bearings on that video lol, is he referring too the little screwhead next to the bigger one on the second pic?

See above link Dave, as you can see in your pics, someone has wound her up.... Start with unwinding it half a turn, and check smoke and boost pressure. I would really recommend fitting a pyrometer to the vehicle if you are intending on playing with fuelling etc. It is easy to overdo it.

JC

Originally Posted by Davehillbo

I couldn't get my bearings on that video lol, is he referring too the little screwhead next to the bigger one on the second pic?

Yes, the bigger one is a bleeder. And you really should tighten up your transmission throttle cable...

JC

Do you turn it anti-clockwise with a flatheaded screwdriver? how far out is it meant to be?