I have a 92 4- runner with v-6 motor. Swapped in a motor out of an 88 motor ran great before pulled. Now I have a miss fire on cyl #1 I have changed the spark plug,wires,cap and rotor, distributor,and injector. Has not changed anything. I am out of ideas anyone have any ideas thanks.

 

Did you swap the injectors??????

'88 used a low impedance and your '92 ECU uses high impedance. You may have smoked all the injectors.

 

Ya I swapped all the injectors out of the 92 motor which ran just had a rod knock also put the distributor out of the 92 all the coolant sensors at the back of the manifold