I'm in the process of diagnosing various turbo related issues after I got my original Borg Warner (KKK) turbo refurbished (no upgrades, just a refurb). There's reasonable turbo lag, and I've adjusted the actuator (post install) and can't seem to get the setting right.. seems to be way to far down the actuator...

 

.. anyway... I've been doing some vacuum tests on the vacuum lines and found that the EGR / Anti Shudder / the vacuum ball thingy all hold vacuum no problem.. the turbo actuator on the other hand has no vacuum.

I've tested the pipe from the vacuum distribution box to the turbo by disconnecting from the turbo and blocking off.. then vacuum test from the box end and it builds vacuum and holds.. so the pipe is good.

If I connect the vacuum tester "directly" to the turbo actuator I get no vacuum. Not a bit.  Now, when the car is running you can see the actuator moving a bit but I don't think the travel is far enough (hence me testing the vacuum)

 

My question is: Has anyone had the turbo actuator itself fail?

 

Thanks,

Phil.

 

 

 

It's just a diaphragm in a can and it can perish and split, don't mess about just fit a new one.

Thanks, I've ordered one as they are not too expensive.