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I just rented the gauge to check fuel pressure....couldnt find valve to connect...i pulled this up to ask and i see that there isnt one.... As to how it runs...every now and then it it briefly sputters while giving it gas. Its hard to tell anything happens...then this light and the code... Im...

check engine light came on and A.Z. diagnostic device code was P0193 fuel rail pressure sensor condition any thoughts about what to change first, fuel pressure pump, fuel regulator, fuel filter, fuel rail pressure sensor??