FIRST OF ALL, ITS THE 1.7LITER IN 460! (HUeuheuhe, B18FP)

Now. I know its the same engine so atleast some of you 1.7l owners should know about my problem.
Thing is, my variomatic is too purrdy to use on winter so I bought a 460 SE -92, that car havnt move since mars last year with almost empty tank.
I manage to start it first but the idle went up to the sky a bit, went really rough and then died and refuse to start without using the start engine downhill.

I put in a new battery (Had an ok one from work, Ford Silvercalcium 650) changed the sparkplugs, ignition rotor + distributor and airfilter. Added some antifreeze + antiwater and new fuel.
Started very quickly after it and went ok. Smoked like a beast but it was driveble

It acted VERY tired when reving up but slightly got better and better the more it was driven. You have to use 3rd gear to travel in 70 kmh and it just coughes and cant handle 4th and up. Even in 90kmh
Sounds a bit like early/late missfire, easier to hear when using throttlehouse instead of pedal. If you give it pedal-to-the-metal it wont rev more than 5k RPM (Not sure either, the meterhouse is kinda bad shape so the arrow cant go under 2k rpm at times (But you hear its about 900-1000). It wont die on idle but its still rough.

Bad compression or things just dirty? Could still be eating water from old gasoline or maybe the missfiring is because of all the funny anti-everything stuff I added :3 Im having thoughts if the timing belt have slipped too, im gonna change it anyways.

I'm not sure if they had carbs but that very much sounds like very rich mixture to me. As we're being effected by hills I'd put money on carb floats being way out. Either they're sinking or not set up right.

Injection on it, I might add some system cleaner in the fuel to make sure getting all valves and injectors cleaned up
Ack, my lambda might be rusty x3

It's Fenix fitted to that, my money would be on a knackered water temp sender (not the one that does your dash, there is one straight to the ECU)

I think the ECU think's it's -40C outside, so is running her super rich. The same has happened on both my F7R 300 and my Corset.

Sounds fair enough..because the temp in car is completely dead. It it the sensor at intake or at sparkplugs?

I'd imagine (been a long time since I looked at a 400) it's just under the thermostat housing.