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I agree with Evil Twin Skippy
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Posted by Charles [Email] (more from Charles) on Thu, 18 Apr 2002 15:14:31 Share Post by Email
In Reply to: Depends..., Evil Twin Skippy, Thu, 18 Apr 2002 13:02:47
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Hi Mark;
My '86 900S 16V wouldn't start once after work about 6-7 years ago on a cold winter day in MN. Had a friend push me down the road about 1/4 mile until it finally started. I had a block heater installed prior to that (see below), but have plugged it in only once, especially since the car now is garaged overnight, there's no plug-in at work, and the weather has been realitively mild as Skippy mentioned. And, the car has always started since then.

Now that I think back, about 10 years ago I did have a cold starting problem. The car wouldn't start during a very cold spell (about -20F each morning for about 1 week), and I had to replace the plugs to get it running. A Saab mechanic told me that when the temperature is below about -10F, I should unplug the cold start valve, since this valve floods the engine with gas that won't start anyway until the engine has cycled for 20 seconds or so and is a little warmer, and this flooding destroys the plugs. I don't know at what temperature gas won't ignite, but he claimed that the cold start valve was designed for operation in Swedish winters that are not as cold as Minnesota winters. He said the valve performs well above -10F. It was around this time that I had the block heater installed (or is it an in-line heater in the hose? note:it was Saab installed), and I've since always carried a spare set of plugs (and tools) in the trunk, and recall unplugging the cold start valve once or twice in the past 10 years if the engine didn't fire immediately - haven't had a problem since. Hope this information is useful and not too confusing.

Charles

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