2001 Montana backfire issue

[Aaron Jenkins]

Just did a lower intake manifold on my Montana. After completing this task and trying to start it it would not start due to back fire in the engine. I have no codes showing up and stuck. Please help and advise what the issue is. Thanks!

 

[melsg5]

you have to go back over what you did, something perhaps was not correctly reconnected related to ignition

 

[Zimgxp]

Plug wires crossed?