WEIRD idle issue on turbobrick

Nope, no flame trap in any red motor turbos. If you got the screen, you got it wrong.

i'll put in another vote for turbo as well, and here's why.

the early mazdaspeed3's that had turbo seal issues did this exact same thing. they would be fine 85-90% of the time, but if you let them idle for 5-10 minutes, they would absolutely start fogging the place out. tap on the gas a bit and it stops for a while.

since there are no signs of oil in the intake, i'd pull the downpipe/exhaust housing if you can so you can get a look at the exhaust turbine. if its been leaking much, it'll have coked oil and residue in the housing and wheel

I'll try checking the exhaust wheel on the turbo - that's a very good idea.

I'll leave the rest of the crew to potentially shop for dramatically larger turbos in case I "have to" replace this one and "just can't" find a direct replacement.

tuna55 wrote: I'll try checking the exhaust wheel on the turbo - that's a very good idea. I'll leave the rest of the crew to potentially shop for dramatically larger turbos in case I "have to" replace this one and "just can't" find a direct replacement.

Now there's 'sneaky' for ya.

So...

I may buy Deans 15G

I have been too busy to pull the downpipe off

but...

This morning I blew a radiator hose. I stopped at the local parts store to replace it (JD, I am SURE that you weren't the guy who there on the ill fitting, 1/2" larger diameter hose on there) and the nice lady even gave me a bucket of water to fill it up with. While I am trying to get the thermostat to open, I am revving the engine a bit. It starts doing it's smoking thing... I blip the throttle and lo and behold, a puff of smoke from the exhuast of the turbo when it spun down. I guess this truly means either the drainback tube is clogged or the turbo seal is bad or both, right?

I sure hope it wasn't me! I don't remember doing hoses on that car except for the ones to the heater.

there is definitely oil burning somewhere, and it is coming out of the exhaust.

I know this thread is 5 years old but I'm having this exact same issue with my 1990 740 turbo. This is the only thread I've found on any forum that is exactly what's wrong with my car. Just curious if you ever found the issue