I'm firing on one of two coils. I've tested the coils in every way and found the problem to be in the neg. wire . This wire runs back to the Bosch module that sits over the driver side strut. I've searched the whole net and can't find this part. Does anyone know if theres anything else that would stop the firing on just one coil? I figure it's got to be this module or the ecm or computer. The part is a bosch with two sets of numbers 0227 400 826 and 015 545 6232.