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1007 Chevy Impala SS 5.3L
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6 Posts
Discussion Starter · #1 ·
So I’m get the code po304 which is a misfire on cylinder 4. I changed the spark plus, the spark plug wire, and the ignition coil. I even switched #4 with #5 to see if any of the parts I bought were bad. Nope..

im at a lost right now. Not sure on what to do next.
I even put fuel injector cleaner in with my gas and ran it for 3 minutes till the check engine light came back on.
Any idea what it could be??
 

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Registered
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1,907 Posts
So I’m get the code po304 which is a misfire on cylinder 4. I changed the spark plus, the spark plug wire, and the ignition coil. I even switched #4 with #5 to see if any of the parts I bought were bad. Nope..

im at a lost right now. Not sure on what to do next.
I even put fuel injector cleaner in with my gas and ran it for 3 minutes till the check engine light came back on.
Any idea what it could be??


You may want to post the year, make, model and engine of the vehicle you are working on.
 

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1007 Chevy Impala SS 5.3L
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6 Posts
Discussion Starter · #8 ·
That I was going to try next I already put a long flat head screw driver on it and it’s making the “tick, tick, tick” sound so...
 
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