Help!! Supposid Afm Troubles

[carbyfed]

I own a 89 r32 gtst 4 door. I had troubles with the car firstly when driving on highway doin 100 then just all of a sudden power loss to 2500rpm. it was like a rev limiter was set at 2500rpm wen u tried to exceed this it would would feel like a fuel cut.

When u pulled ova the car would rev constantly up and down itself from 1000rpm to 2000rpm. you could turn the car off then start it say after 5 mins and it work perfectly fine. I had a green stickered AFM and wen i went for a trip to brisbane I bought a second hand one supposedly off a 92 model gtst but with a orange sticker. i put it in and the same.

once i was home i checed att pins in AFM and put the new AFM back in and now doesnt lose power anymore at all!!! BUT wen u flat foot it it boosts fine and goes great till u hit say 4500rpm and engine finds hard to keep revving and boost is there but not much go like in lower ranges. Does any1 recomend me finding another AFM with same green sticker and serial no?? its all stock car except exhaust.

thnx in advance for any thoughts