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11-23-2004, 08:14 PM
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#1 | |
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Registered Member
Join Date: Oct 2004
Posts: 48
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Re: 5.0 idles up and down when warm
Quote:
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11-24-2004, 09:40 AM
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#2 |
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Registered Member
Join Date: Apr 2001
Location: Staging lane
Posts: 4,337
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Re: 5.0 idles up and down when warm
It takes a minute or so for the o2 sensors to get to operating temperature. When they get to temperature the ecu then starts collecting data from them, if they are faulty they can cause a serious idle surge especially on a speed density car.
last Summer my car would start up and idle perfect until the O2 sensors warmed up and kicked in, then I had a steady idle surge. I replaced them both with Bosch O2 sensors costed about a $100.00 and now it idles like a dream.
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92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer |
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11-24-2004, 10:00 AM
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#3 |
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Junior Member
Join Date: Mar 1999
Location: Ventura, California
Posts: 8,981
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Re: 5.0 idles up and down when warm
Your IAC solenoid is the can shaped item bolted to the throttle body. After the engine warms up, unplug the electrical connector going to it, and see what happens. If the idle smooths out, the IAC needs to be cleaned or replaced.
Have you checked for any codes?
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