JRWperformance
Member
My 4th gen swap is running the factory ECU. I have a 3 inch turbo back exhaust, larger water intercooler, and manual boost controller. I hooked up a nice AEM wideband to moniter AFRs. Under idle and lower load driving, its a nice 14.5---15.2. But under full load, its indicating low 10 to 1 AFRs sometimes. Is this normal to run this rich? The car drives like a bat out of hell, so I dont think its really hurting performance.