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Lean running condition

872 Views 1 Reply 2 Participants Last post by  Marine06
hello everyone, i got this info from this company called Perrin that claims on the EJ20 wrx motor cylinder number 3 runs lean and as you add upgradeit gets worse, is that true? wouldnt that effect the cylinder that shares the same fuel rail on the same bank? i was under the assumption that fuel pressure should be the same on both sides of the fuel rail. could it be caused by the fuel mapping error under certain conditions? if it is true why is that happening? i am alittle confused about this statement made by this company, any reply on this will be great.... :eek:


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