well, i drove from virginia to california for the military, car ran fine for the first 2 days. from then on it ran like garbage. after cruising down the highway for a bit the tach would bounce around and it would stumble. i would stop and shut the car off, then restart it and it would run fine for another 20-30 minutes. when cruising through small towns, when decelerating to a stop the tach would bounce around and it would cut off.

code 42 was being thrown inbtermittently

thanks in advance for help guys

 

bump, i need help

 

Same here My tach on my 2.8 is sitting on 7,000 and everytime i try to crank it it would go between 5K and 7K when started but when I shut it down it rests on 7K. What could be the problem