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cylinder misfire code

dennhelm

New Member
Joined
Apr 29, 2019
Messages
1
I keep getting a cylinder misfire code on cylinder 5 only on my '07 5.3. After I drive it 50 -100 miles it goes away and comes back in a week or two or any time my wife drives it. I have replaced the coil pack on that cylinder to no effect. I am about to replace the plugs and wires as it has 102K. Also, it idles at 500-600 rpm and the stabiltrac light comes on. Is this system electric or vacuum operated?. I can rev the engine too 800 - 100 rpm for about 10 seconds and the s/t light will go off. Thanks in advance for input.


 
dennhelm first :welcome: second, try using the search function as I think we just talked about this the other day.  What is the code you are getting P0300?

* = Most Common
Faulty or worn spark plugs *
Faulty spark plug wires or coils *
Distributor failure *
Faulty fuel injector
Vacuum leak
Low fuel pressure
Camshaft sensor defective
Crankshaft sensor defective
Engine timing off
Leaking head gasket
Low engine compression
Poor quality fuel
 
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