Flow test injectors and gather data. 4 Flow-matched fuel injectors per order. Reconditioning Process Back-flush to remove any internal debris left behind (multi-step process).
1 of 4 injectors were usuable on 2006 toyota corolla. Unfortunately 2 were stuck open sprsying gas into engine constant causing rich codes, and cylinder 4 and 1 misfires, 1 came with too small of O rings. Ended up installing 2 old ones and had to buy 1 new one oem and o ring kit. Car still runs rough with cylinder 4 being denso but no misfires yet. :/. Injectors ohmed out beteen 12 and 14.8ohms but still failed.
These are used and refurbished I get it. The thing that I did not like is the seals the seals are not oem so they did not fit on my 2008 corolla. I had to put the old seals that worked like magic.