Bad engine miss

Hi and thank you for using 2carpros.com Since you replaced the intake gasket, I would recommend checking engine vacuum to make sure there are no leaks. If you have a bad leak, it can do what you described. Keep in mind, whoever did the work may have simply forgot to reconnect a hose or the new gasket may have failed.

Here is a video describing how to locate a vacuum leak:

https://youtu.be/xN5pcM-5bso

Here is a video describing how to determine if there is a leak:

https://youtu.be/4ktw1X4W_-k

I have attached a general vacuum diagram for your review.

I hope this helps.

Take care,
Joe