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305 TBI rough idle

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Old Jun 10, 2016 | 12:10 PM
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David Fite's Avatar
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Joined: Nov 2015
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From: Kentucky
Car: 1986 IROC-Z
Engine: 305
Transmission: Auto
305 TBI rough idle

Here's a video of my car on a cold start. Lots of surging and almost stalling out. After a few minutes it smooths out for the most part, but it takes a while. Any ideas what is causing this?

If you listen you can kinda hear a whistle when it surges, not sure if this is a vacuum leak or just the sound of the air sucked into the air cleaner or what.

new plugs
new wires
new coolant temp sensor
fuel injectors make a nice cone shape
does NOT have the IAT sensor in the open element filter
smog stuff removed by PO

Last edited by David Fite; Jun 10, 2016 at 12:19 PM.
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