1FST99Z

iTrader: (9)

Well as my project gets closer to being complete. it goes back to running into another problem. the car idles fine then all of the sudden the tach stops working. like the car is turned off and then the car starts to idle rough like the car is misfiring. the pcm has been changed. all the grounds have been checked and the plugs and wires have been checked as well. right now we are in the process of getting new O2 sensors and then hooking up a laptop to it then driving around till this happens. it isnt all the time. any help is appreciated.
thanks in advance.
Wesley