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Weird symptoms and white smoke/steam

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Old 10-21-2019, 09:07 AM
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Default Weird symptoms and white smoke/steam

Hello guys,
1. Hope this is the good place to post this, if not, please excuse me...newb here.
2. Current build is a '92 1.6 miata, td-04 turbo, aem wideband, ms2pnp, rx8 injectors (some other stuff which may or may not be relevant : bosch tps, pierburg boost controller) .

Story is like this : went away to do some pulls for mapping , maybe 4 or 5 3rd gear pulls to redline, we went slow for a while stoping at a gas stations with the engine runing for 5 minutes, then a bit of slow driving, another stop for 10 minutes with engine runing, moved the car to parking lot, turned off to read some logs. Decided to go again for pulls, now car doesn't start. Tried again, had a small hesitation ( crank moved less than a turn and stopped), tried again engine rotates, doesn't start. After finished cranking we heard clicking noise ...the injectors were working with the engine off (?!!?!?!) HOW?! -weird. took the key out, took the injector connectors off the injectors, they look clean and ok. put them back , take spark plugs out ( 1&3 looked fine, 2&4 looked soaked) , cut fuel and turned the engine a few times to get the gasoline soaked engine to a drier state. Finally started with only 2 cylinders firing ( tested that by taking wires out from spark plug 2 and 4 with no change in how bad the engine ran). I thought that maybe the driver in MS for injectors 2 and 4 is fried, tested with the multimeter and I got some values measuring voltage between pins and ground which seemed to be corelated with the frequency set in MS in test mode. (injectors were disconnected from wires at this point) . At this point I thought ok, I will try to get the car back home in 2 cyl, put it back together, but it started perfectly fine with the only thing out of ordinary a lot of white smoke/steam on the exhaust. not blue, not gray, white, smelling like gasoline. In less than 5 minutes, there is no white smoke, car drives fine, did a pull to see maybe i can reproduce the problem ( I thought maybe it was heat?!) and after the pull I got white smoke again for a few seconds. Now everytime i drive it hard, i get white smoke when it goes back to idle
Checked : spark plugs - fine, no water missing, no oil missing, no oil contamination in water (no oil pools in radiator/ reservoir) , no water contamination in oil (oil looks like...used oil. no chocolate milk), turbo has some play, nothing excessive, path to intercooler is clean and dry inside. I tested maybe the brake booster is leaking brake fluid to intake manifold- it is dry and clean also.

Where is the white smoke coming from? Maybe my car does some witchcraft /alchemy and turns gasoline into water...(it runs a bit to rich, just to be on the safe side until i get the map done right).

Any lead is appreciated.Thanks!

TL;DR : white smoke on exhaust at idle after driving hard, doesn't lose oil/water, no contamination between them, no brake fluid missing, turbo doesn't spit oil, Where is it coming from?
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