Misfire codes with no misfire

[CrsTeva]

Had 3 codes, p0300, p0301, p0304. Took it into a shop telling them I had a misfire issue and when they diagnosed the car they said they couldn’t get it to misfire and it was running fine. I’m so confused

 

[BudgetPhoenix]

Is the car still running bad? Notice any idle surging? By far the most common cause for sudden misfire on all multiple cylinders is a vac leak

 

[CrsTeva]

Is the car still running bad? Notice any idle surging? By far the most common cause for sudden misfire on all multiple cylinders is a vac leak

When I noticed the codes pop up I only drove it about 10 miles to the shop a week later and it didn’t seem to be running poorly, it felt like I hadn’t driven it in a week but that’s how it always feels cold, haven’t driven it yet since they said it’s fine, it’s still there getting oil changed, we’ll see when I pick it up

 

[Thumper]

Did you clear the codes before you took it to the shop?

 

[CrsTeva]

Did you clear the codes before you took it to the shop?

Nope