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Saab Model 99 Bulletin Board
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Re: Running rich when first started
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Posted by Rowan (more from Rowan) on Wed, 4 May 2005 11:37:18 Share Post by Email
In Reply to: Re: Running rich when first started, 79-900t [Profile/Gallery] , Wed, 4 May 2005 10:12:52
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Hi Bruce - if it's the injector that you disconnected, then the culprits will likely either be the thermo-time switch (mounted in the cylder head), the vacuum diaphragm switch (mounted next to the ignition coil), or the throttle body switch (engine side of the throttle body - a little lever switch with two wires going to it - activated by a lobe on the throttle).

First thing I'd check is the throttle switch - cause if there's continuity through there, the 5th injector will be on all the time.

I *think* that if there's continuity through the thermo-time switch, then at idle the injector will be on also - this is supposed to only be a momentary thing, just to get the engine started, and then the injector is supposed to shut off unless you're at wide open throttle.

regards,
Rowan

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