[70tangerine]

I have a 1987 930 with some bolt on mods- turbo intercooler headers 1 bar spring and LTW flywheel and 935 clutch dist or something.

A simple issue might be Bad Gas in the Tank ???

I am sorting out the same problem with the low idle and not running just right at first. ( came out of no where )
Then once a few mins pass and I rev it up a little it catches and idols pretty normal. IF this is something that happened after storage and or putting a fuel it maybe just the Bad batch of fuel.
I will post back once I let my 930 sit for a night.

Note my problem happened 3 weeks ago after putting in 10 gallons of 93 BP Gas in Vernon NJ on a little back road rally I was on this was after car was in storage for Winter.
I put car away soon after I noticed this issue until I had time today to fig out what has happened after the tank of gas. I burned through about 7 gallons of the BP Gas so ended up today at 1/4 tank of BP 3 weeks old and gas from last Fall November. I put in a bottle of Techron Fuel treatment at around 1/2 tank can not hurt that is good stuff. It did not fix the problem but I really did not have time to drive the car so I put it away and took it out today.

1. Today I drove to Sunoco and put in 14 gallons of 93 Ultra to fill my tank up to almost full I did not turn my car off as it sometimes would not start at one point earlier today so once I got it started I left in running.
2. After tank was nearly full Jumped in the car and took off on to the highway
and got on Boost in 1st gear 5k RPM shifted to
2nd gear and took it up to 5,500k RPM maybe 6k and as I looked in the mirror I saw all sorts of nasty smoke cloud behind me. ( K27 hiflo turbo) has a good punch.
Power felt a little down but then when I shifted to 3rd the car woke up and felt much better smoother I took 3rd Gear to 4,500 RPM and then was on and off the boost keeping revs up around 3500 to 4000 RPM and higher. I even double clutched and down shifted to 2nd gear at about 45 MPH and ran 2nd gear again up to about 5500 6k RPM and NO smoke anymore. Car seemed to have all its power back and was Smooth as a baby but in all gears. Idol seems be be fine.
BIG TEST is tomorrow will it Start and will it Idol correct.
Then I stayed in 3rd gear.