How do you adjust the idle on a 1986 mitsubishi

Check Idle Air Control solenoid.

fast idle speed screw, works off the fast idle cam which the choke adjustment sets, it works together by linkages. This is the raised idle speed setting you need to keep a cold engine running. First you set the idle speed by the idle speed screw with engine at normal operating temperature. Then you set the linkage up so the cam is on a raised step, throttle will be held on that raised step. then you can turn the idle speed screw to get idle at about 1500-1800 rpm. Now when you start engine cold, choke will set the fast idle cam on that raised step- when engine starts and runs it should be running at your fast idle setting. That's how it supposed to work, you just have to get everything adjusted right. I hate carburetors, they never stay adjusted right. Considering their complexity and small mechanical parts, no wonder.

bloody hard recently changed mine in a3 sport ended up in a right mess label , mark every item even take pics on mobile phone

It sounds like an O2 sensor or an EGR valve, maybe even a vacuum leak

First thing to do is pull battery terminals( neg 1st) and clean them and tightly reconnect. Hope that helps

1-3-4-2 clockwise

have the battery and the charging system tested, Kragen and Autozone do this for free.

There should be timing marks or dots on each of the timing gears on the front of the engine. These marks or dots have to be lined up for the engine to be in time. The one on the top gear pointing down and the one on the bottom gear pointing up. They should line up with other.

I recently tried the DIY service and repair manuals from a website and it actually helped me repair transmission problem in my jcb 3cx site-master. It would'nt move forward or reverse, engine was good both solenoids for forward and reverse worked, but still couldn't diagnose the problem.
I don't have much technical knowledge but I just followed it step-wise, and now it works perfect! covers wiring, codes,
diagrams, torque specs, PCV, everything
got it from www.reliable-store.com

that is not a probelem it is the fuel system warming the engine and turbo
you should always warm up a turbo car before jumping in and taking off and cool the engine before shuting it off turbos are the most temprelental engine part there is. those steps will prolong the life of the turbo and engine. my starion with the g54b 2.6 does the same thing