barneybrendan Posted February 21, 2012 Share Posted February 21, 2012 what do these units actually do and is there any beneffit from having one. http://www.ebay.co.uk/itm/HKS-AFR-Air-Fuel-Ratio-controller-Brand-New-Box-Type-L-/270896021435?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3f12a93fbb Link to comment Share on other sites More sharing options...
fastcar Posted February 22, 2012 Share Posted February 22, 2012 They plug in to the ECU and controll the air/fuel mix. They are only really for minor mods like bpu as they only have slight adjustment. I brought one when i went BPU but never bothered to fit it never even took out of the box as my AFR's is fine. Not sure how good they would be at controlling it though i would imagen its quite a crude way of doing it Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted February 22, 2012 Share Posted February 22, 2012 Airflow signal fudger, only works on cars with AFM. Link to comment Share on other sites More sharing options...
barneybrendan Posted February 22, 2012 Author Share Posted February 22, 2012 Ok so no good for a j spec. Link to comment Share on other sites More sharing options...
fastcar Posted February 22, 2012 Share Posted February 22, 2012 I'm sure there are 2 types one for UK spec and one for J spec Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted February 22, 2012 Share Posted February 22, 2012 Even if there is one that fudges the MAP sensor voltage, i would still avoid them, its a very crude way of fooling the ECU, and can result in unwanted timing advance/retard which is not desirable or very safe. Link to comment Share on other sites More sharing options...
fastcar Posted February 22, 2012 Share Posted February 22, 2012 thats what i thought. thats why its just sat in a draw in my house Link to comment Share on other sites More sharing options...
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