Gab98zj

hi, i have a 98 grand cherokee laredo 4l 6 cil, automatic 4x4 and a few monts ago the motor stop and the computer gives the error code 1391, i replace the crankshaft position sensor and it runs again but it still have the code.
i replace the distributor including the cap, rotor and the camshaft sensor and the code still there.

I bought a new computer and instal it but when i install it, the new computer gives to me the same code, so i bougth again a new crankshaft and instal it, it works good a short time but then the code appear again.

Every change that i make i errase the codes with an obd tool

I replaced too the ignition coil, spark plugs, fuel pump, fuel filter and Idle air control module