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Thread: Weird problem
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Old 04-10-2013, 12:24 PM   #7
drummer829
Focus Enthusiast
 
Join Date: Dec 2009
Fan#: 71497
Location: Romeoville, IL
What I Drive: 2005 liq grey ST

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Quote:
Originally Posted by amc49 View Post
If it's running up to 6K then not fuel. He says it dies after letting off or going to neutral. Could be IAC or TB aircrack carboned up, which are supposed to take up idle throttle when letting off, or could be nothing. I used to hotrod both bikes and cars, sometimes dying after a hard pass was the norm, nothing wrong there at all other than whatever is supposed to maintain idle speed is not working as well as it should. The main reason for damping dashpots on oldschool carbs in the later '70s and '80s was this very thing. They simply made up a device that slowed the engine speed from dropping so fast, a 6000 to 700 rpm drop has a tendency to keep dropping, inertia, you know.
So would you suggest just driving it for a few days and see if it continues?
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