Ive converted my ae82 from a 88kw engine to the later ae92 100kw 4age.My car runs excessively rich,to the point that black waterly based liquid will run out the exhaust after only a few seconds from being started.If you apply any throttle it sprays all over the ground.When driven it gets sucked back up onto the rear hatch and rear window.It's very unsightly.Also there is hesitation when driving and sometimes so bad that it feels like the car is being driven with the handbrake on (even at 5000-6000rpm).What could or can i do to fix this ongoing problem? Should i try and get a fuel only type management computer?