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Another thing you might want to do is clean the inside of the throttle body where the butterfly valve is. It gets surprisingly gunky in there and definitely affects idle. Just remove the air intake hose and squirt some carb cleaner on a rag, open the butterfly manually with the throttle lever and clean it all up.
Also, make sure the passages for the Idle Air Control valve are clear and there are no vacuum leaks. Some of those hoses get really brittle.
_______________________________________
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900 Turbo Convertible - 1991, Automatic
Enhancements: Swedish Dynamics Stage 4 Red Series APC, Fuel injector set, and EPROM(Fuel "Chip") for the BOSCH 2.4 LH fuel management system!
-------------------------------
Colorado Springs, CO
Posts in this Thread:
- '94 Vert rough idle at cold start and check engine light, Alan, Tue, 16 Nov 2021 03:57:03
- Re: '94 Vert rough idle at cold start and check engine light, Matt Grimes
, Wed, 1 Dec 2021 18:56:14 <-- Viewing This Message - Re: '94 Vert rough idle at cold start and check engine light, JeffR
, Fri, 26 Nov 2021 18:42:19 - Purge Value - 1985 900 Turbo, iEdge, Wed, 17 Nov 2021 15:33:51
- Re: '94 Vert rough idle at cold start and check engine light, Bernie
, Tue, 16 Nov 2021 06:44:10
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