Im curious what could cause this, at about 3k i get a flat spot til about 3700 rpm, wondering what fixes/suggestions there could be for this. Its a 2.0 silvertop by the way.

 

Try cleaning the MAF.
tabetha

 

has it always done it? or just started suddenly.

if you havent had the car mapped i suggest getting it done; a decent mapper can iron out flat spots.

 

Its done it since I got it. Thanks for the suggestion but I cant see how mapping would make any difference, its all standard apart from a k&n filter.

 

trust me a map would get rid of it; a friend had a 328i bmw with a flat spot; got it mapped and it was gone and plus it will give you a smother motor and be better on fuel

map are always worthwhile for standard and modified cars imo

 

Are using the standard ECU and EFI set up?

 

Yeah, however they are 1.6 inlet and exhaust, with 2.0 injectors.

 

Well get a RS1800 inlet and a megasquirt. You should see around 150 bhp as that is all the inlet will flow NA.

You will never get it running properly mixing and matching parts like you have.

 

i did and mine was, as tabetha said it sounds like a maf problem. im not 100% that you can clean them as such. but change it to a known working one. are you using the 2l MAF and TB?

 

You can clean the MAF with brake or carb cleaner.