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pulsation/ idling

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Old Jan 5, 2022 | 08:44 AM
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Default pulsation/ idling
Hi, all its been awhile but I have this problem in my 84 vette it has a crossfire 350 motor and what it does is it ramps up and down it will idle high around 17 hundred rpm then down to 12 rpm then back up to 17/18 hundred rpm then back down to 10 hundred rpm and so on it don't idle right it keeps going up and down I replaced the fuel pump no change.. does anybody have clue what it could be I thank you for your time
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Old Jan 5, 2022 | 08:52 AM
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If the idle is "hunting" its usually a vacuum leak. Look for broken or disconnected lines.
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Old Jan 7, 2022 | 06:31 PM
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Thanks I'll check it out
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