have a 96 4.9 4x4 that is slow cranking n will not start symptoms of a weak battery so far I've replaced battery ,all grounds ,power wires to starter ,all leads are getting 12.58 volts. New solenoid ,new starter, new coil ,spins freely with plugs out ,when putting them back in I get a slow crankthing again I can turn the motor over by hand fine

 

maybe it's just me, but i find this difficult to understand.

 

Nope, same here. Mobile device to english translation is broken.

 

Not really sure what you're asking either. Have you replaced the starter itself?

 

Sorry I fixed n yes I'm on my cell phone

 

I've replaced the following starter,the solenoid,all leads off the battery to the starter, I have ground from battery to the inner fender and starter to chassis

 

Does it still crank slow if you disconnect the coil wire?

 

Haven't tried that yet i will tomorrow

 

You need a good solid ground from the battery negative to the block which I believe is a spade type terminal on a 6 cylinder. Make sure that connection is good.