Chevrolet Silverado1996 5.0 ltr

Question

Code p0172 & p0175, replaced mas, injectors, coil, wire, plugs, fuel pressure reads 45_50 psi., code p0304, now I get code p1325 camshaft and crankcase positioning correlation.

Answer 1

P0172 Fuel trim too rich Bank 2

P0175 Fuel trim too rich Bank 1

The only way you can set a P1325 is if the distributor is not installed correctly, That or the internal component of the distributor has shifted out of position, This would require the distributor to be either rebuilt or replaced.