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Dropping too 500rpm

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Old Dec 3, 2010 | 09:18 PM
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Default Dropping too 500rpm

Just went out to mess around with my buddies lightening, I'll post the video later, and my car keeps dropping down to 500rpm when I put it in neuteral from any gear to cruise. Keeps idleing low and then a few minutes later it will be fine. Also my service engine light just randomly shut off!!
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Old Dec 4, 2010 | 10:56 AM
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Anyone??
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Old Dec 4, 2010 | 11:41 AM
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that idle doesn't seem abnormal, mine idles at 450-500 in gear, but i am auto, in park it idles at about 550 maybe.
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Old Dec 4, 2010 | 01:26 PM
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What? I haven't heard of too many people that let there car idle at 500. That's awfully low.
I installed the new full exhaust without emissions. I cut the lines going to the air box and clamped them shut. Does anyone have am explonation of why it randomly drops down to 500 like it wants to stall?
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Old Dec 4, 2010 | 02:27 PM
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does the car misfire? am guessing you have a lose wire or a bad spark plug.
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Old Dec 5, 2010 | 01:37 AM
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It did not do at at all today. And no it does not sounds like it's misfiring the exhaust as the same steady rumble. I was thinking one of the wires. Will my diablo sport handtuner pick up all the codes?
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Old Dec 5, 2010 | 03:36 AM
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^ if one of the wires is bad it will misfire too..if there are no service engine codes then you cant detect them. does it do it everytime? check your air filter and maf.
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