Hiya guys, at the mo while supra is being done, I'm driving around in my runaround st202 Celica, which, recently had another engine fitted. At first it had no power really and just drove around farting, I replaced the plugs which seemed to resolve the issue.... For a month, now it's started again!
The issues I'm having, are hugely over fuelling and hardly any power at all, irratic idling, when cold it's running at correct rpm, when warm, almost 1500 rpm. And (not constantly, just whenever it wants) starts farting and rough as hell from a set off giving minimal power
Any help would be received gratefully
Only answers I've been given from a few people was it could be the O2 sensor
Many thanks, shaun