can a vacuumleak cause code 0304?

[ron schneider]

I have a job 1. I had codes 0171 and 0174 so I check for vacuum leaks but I could not find any vacuum leaks so I reset the CEL. Did not come on for 3000 Miles. The cel came on Did not check it the it went off by itself the next day. Then a week later the CEL came on againI got codes 0304,0305,0306. What should I do? can a vacuum leak cause these codes?

Any Help would be appeciated.

 

[EddieS'04]

missfire on cylinders 4, 5 and 6....

 

[Andy G]

I would doubt a vacuum leak...



Opt more for plugs and wires....