Hi,

I have a 99 WRX (with various Mods) that keeps misfiring at low revs.

Its been doing it for a while but I cannot find the problem.

Originally we believed it was the MAF sensor but we replaced that and it also has new GEMS ecu but it is still misfiring.

It basically does it at around 1500 - 2500 rpm and when driving normally, no matter what boost I'm running.

Can anyone advise as to what they think the problem could be as its getting unbearable now.

Could it be any of the engine sensors??

Thanks

 

plugs or leads.. or the ecu map..

Simon