JRSC rough idle with FC TB? - Focus Fanatics
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Old 04-16-2005, 08:04 PM   #1
dBlast
Focus Rookie
 
Join Date: Nov 2004
Fan#: 15118
Location: Maple, Ontario, Canada
What I Drive: 2000 Malibu blue ZX3

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JRSC rough idle with FC TB?

I just finished installing my JRSC and now my 2000 ZX3 has a rough sputtering idle. It seems ok with the throttle open, but as soon as I let off on the gas it starts to sputter and then stalls. I have no CEL or vacuum leaks (I think.)

My FC TB was fine before the JRSC was installed. With the throttle closed the FC TB has 3 bypass holes to let air through to maintain idle. This was fine when mated to the stock intake manifold which has a sloted opening to accept the bypass holes. The JRSC just has one hole slightly larger then the 3 small holes on the FC TB. Is this mismatch the cause of my rough idle? Has anyone else had this same problem with this combination?

I used the same gasket on the FC TB as was installed on my stock intake manifold. Could this gasket be leaking and be the cause of my rough idle? Any ideas?



Last edited by dBlast; 04-16-2005 at 08:41 PM.
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