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gday all, not really sure where to post this but im having a problem that is really beginning to annoy me.. xr6t bf2 seems to have a slight popping through exhaust in park at about 2200 to 2500rpm.. in drive under light acceleration it happens at precisely 1250rpm and is heard as a slight rumble through exhaust and a sluggish spot.. if I can hold it @ those rpm the tacho fluctuates approx 200rpm with speed staying same.. approx 60kmh.. but is hard to hold there with 6 speed zf in triptronic mode wanting to change gear at that speed.. from a standing start car performs great, boosts up, breaks traction etc, but from a rolling start around said speed it is sluugish then boosts up, surges, drops then surges again.. not sure but seems to be on gear change, does it with traction on or off.. I was thinking coils to start with but then they usually break down at higher rpm, plug gaps maybe? or wastegate?? no leaks in intercooler piping, throttle body could need a clean but was done about 6 months ago.. low rpm- could it be vct.? im heading to see bruce in next week or 2 as it also has a 2 sec rattle at start up.. possibly chain guides..
