My JDM Y0 Pulsar Serie GTi

whats the actual symptom?

is it a momentary misfire, or does it proper bog down under load/throttle? when does it happen?
 
pulling away, ie off roundabouts/coming out of turnings/pulling away.

only does it up till about 3k rpms, just happens intermitently, if i slip the clutch enough and rev it more when i pull away it is ok, but thats as the revs are up,

when it happens its as if there is a loss of power, for split second, sometimes does it a few times making it jerky,

it still makes boost fine, no other abnormalitys,

it could the the maf need cleaning, also when i start it from cold over the last few weeks it ran only on 3 cylinders for about 4 seconds, changed the plugs and now thats all fine :)

gonna take it and get it on the rollers so will get a full diagnostics on the afr's etc,
 
it is mapped fine, dont need a nistune lol, just a problem that has occured since leaving santapod, the map is perfect,
 
No but what in telling you Stu is the map is NOT perfect. It maybe be satisfactory, but it could be better. It IS overfuelling, you can see it when you pull away and you must be able to hear the popping from the zaust?
 
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