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Rough idle 2008 and 2011

5.3 rough idle

Rough idle 2008 and 2011

Postby Tim1970 [OP] » Jun 22 2011, 1:18am

Hello all, Im new to the site i just bought an 08 silverado with the 5.3, 48,000 miles and it has a rough idle sort of like a bad plug, the funny thing is my brother bought a brand new one and it has the same problem, anyone have any ideas? im goin to schedule an appointment with the dealer next week after my vacation, was just wondering if anyone has any input... ty Tim
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Related Topics  Idle Air control valve causing rough idle?   Rough Idle   Rough idle and ticking   Rough idle after being plugged in   Rough idle in the cold.    Back to stock, now it rough idle   05 Silverado 5.3 rough idle no codes   Rough idle on 5.3 V8- 2012 silverado   Gas cap cause rough idle?   Rough idle and bad lope   05 z71 5.3 rough idle with miss unless ac is on   Random rough idle and occasionally dies?   350 tbi rough idle no power   Super Rough Idle on Cold Start 
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Re: Rough idle 2008 and 2011

Postby JLB » Jul 10 2011, 11:10pm

I’ve had similar issues with my 2010 LT 4x4 Z71 since new. I took it back to the dealer the week after I bought it they said nothing wrong. Now I have 20k miles and it does it all the time when warmed up, but especially when I’m forced to go slow off the line and it shifts into 3rd at like 20, then it misses and does this chug a chug thing until I get up to about 30 MPH.

Regards,
Jeff
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Re: Rough idle 2008 and 2011

Postby ice120 » Jul 15 2011, 7:48pm

On the 08 with 50,000. Check your throttle body. I was having very similar issues, cleaned out the throttle body and everything is working great. I blame it on the Ethanol in the Fuel in North Dakota.
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