2008 5.3 rough idle

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May 5, 2018 | 10:33 PM

#11

FFDP

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From: Rogers, MN

No, those trims are well within the norm. Getting within 5% of zero with a cam a is great at idle if you ask me. A higher idle at 750-800 seems like it could help though.

May 6, 2018 | 12:20 AM

#12

rennat_2006

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From: Washington

I will give that a shot.

May 6, 2018 | 06:28 AM

#13

madmann26

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From: Somewhere north of 285, south of 985.

How does it idle in SD mode?

May 7, 2018 | 10:43 PM

#14

04gibbstahoe

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From: Oklahoma

Are you getting a check engine light? Could be a vacuum leak.

May 7, 2018 | 10:55 PM

#15

rennat_2006

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From: Washington

I will unplug the maf and see how it runs

No check engine lights and no vacuum leaks

May 8, 2018 | 08:12 AM

#16

smokeshow

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From: Detroit

Enriching the idle AFR can smooth things out. You'd just increase your O2 sensor switching voltage in the idle airflow mode cell(s). I'd start with something like 600-750mv and see how it feels.