2004 Silverado,4x4, 5.3. While taking off cold in the morning you can feel the engine surging while idling down the road in drive. After it warms up the surge is still there in the idle mode but not as severe. Runs good while driving or towing, but definite surging while idling along in drive. One code reader showed an intermittent miss on # 6 cyl. Any ideas out there? Thanx for any help.

 

replace the spark plugs and the wires...should fix it if its missin

 

I'll give it a try this weekend. Doesn't really feel like a miss, its a pretty consistent and even surge. And it isn't as bad after it warms up. But I'm an electrician, not a mechanic. Changing plugs and wires won't hurt . Thanx

 

are there any other codes that are poppin up?

 

One mechanic said it was showing an intermittent miss on #6. Another mech said maybe a mass airflow sensor going bad??

 

The 1st thing I would do is clean the air intake. Very common for the air intake to become dirty and cause driveabilty problems like you are talking about. You can get a can of air intake cleaner at a auto parts store for less than $10. Follow directions on the can. Simple to do. And is something you should do from time to time anyway. You will be surprised how beneficial it can be. If it doesnt fix your problem then start looking at plug wire and etc...

 

Good afternoon, I have 265r70 17 tires on 04 Silverado. I want a taller & wider tire. I also installed a Rough Country 2” level & lift. Thanks ahead for any information.