Check engine light on after upgrades

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Check engine light on after upgrades

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Hummer >> Hummer Lineup >> Hummer H3 >> H3 Frequently Asked Questions >> Check engine light on after upgrades

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Check engine light on after upgrades - 4/7/2008 8:11:07 AM

rockind308

Posts: 3
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Joined: 3/7/2008
Status: offline

The check engine light is on now after I had a K&N air filter sytem and catback exhaust installed. On star diagnostics says the engine is running too lean and is sputtering. Is there anything that I need to have done now to correct his or should I replace everything I had taken off? Thanks

Post #: 1

RE: Check engine light on after upgrades - 4/7/2008 8:50:13 AM

Doc Olds

Posts: 3454
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Joined: 7/11/2007
From: Boat Town USA (Michigan 48045)
Status: offline

Keep driving, it may take 100 - 200 miles for your PCM to learn to learn to compensate by increasing fuel mixture etc...

Make sure the MAF Sensor is properly connected and snapped tight at the plug.

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(in reply to rockind308)

Post #: 2

RE: Check engine light on after upgrades - 5/10/2008 8:58:00 PM

Timgco