2002 Q45 Idle high after change spark plugs

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1st_Infiniti
Posts: 5
Joined: Mon Jul 04, 2011 8:24 pm
Car: 2002 Infiniti Q45

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Hi Guys,

Anyone familiar with this problem? I recently have the spark plugs changed and had the MAF (mass air flow) cleaned and sprayed down. But now the idle is stuck at 1500RPM. Any clue of whats causing this? I am clueless and need your help. Thank you in advance!

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Skibane
Posts: 1056
Joined: Wed Apr 26, 2006 5:33 pm
Car: 2000 Q45 AE 110K
Location: San Antonio, TX

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An unplugged vacuum hose can make the engine idle fast.

If it was me, I'd take a bright flashlight and go looking for hoses and connectors I forgot to re-connect when I replaced the plugs.
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Q451990
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Posts: 11030
Joined: Tue Jul 23, 2002 8:21 am
Car: 1990 Q45 - 118K, 2022 Toyota 4 Runner, 2004 Frontier M/T - 108K, 2012 Xterra (Mom's), 2023 Rogue (Inlaws)
Location: Columbia, SC
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Was the throttle body cleaned during the process? It's possible that it was damaged if the valve was forced open during a cleaning. The motor actuated throttle bodies don't respond well to cleaning...

Heath
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