1992 Ford Laser Stumped

Own a Australian model 1992 Ford Laser GL which I converted to a 1.8ltr fuel injected BPT Turbo engine from the Mazda GTX Familia. I recently fixed a bad earth problem but now I'm noticing a lack of power when I hit full gas. Overtaking was never a problem or taking off quick but recently found its driving fine in normal conditions (quarter to half throttle). When starting cold it has rough idle for a few seconds then idles fine after that, wait for approx 1 minute give or take and my street looks like a Jimmy Hendricks 21st Birthday party from all the smoke it emits BUT that clears after a bit. I can drive it before the smoke starts and I never notice any smoke behind me. Unsure if all symptoms are related or not? TPS? Turbo? Or maybe just Ford ha. Anyway I was hoping I could get advise on a possible cause before handing out what little money I have for a Mechanic to look.
Thanks for reading and hope this issue is solved soon before I have to clean the cobwebs off the push bike