940 searching idle in cold weather

Kirby J · Post by **Kirby J** » 13 Mar 2012, 11:10

I also have a (93) 940 Rex/Regina with lots of miles (434k) In cold weather I have a similar idle problem, and problems with the cruise control. After the engine warms up, both problems go away. I have concluded that it is a couple of hard to find vacuum leaks that seal themselves once the hoses get a little warmer and more flexible.

Kirby J

Post by **regent** » 13 Mar 2012, 12:39

Then change those old rotten vacuum lines with some good reliable silicone tubing!

Amys 940 · Post by **Amys 940** » 13 Mar 2012, 16:32

My problem seems to be resolved. No up and down idle this morning! Although it was extremely warm today for this time of year. I would recommend popping off that old idle air motor and giving it a good clean. Use some good spray throttle body cleaner. I also was sure to push the plunger in and out as I sprayed to get it moving smoothly. While you're in there, replace the vac lines that go to it too!

Amys 940 · Post by **Amys 940** » 13 Mar 2012, 16:33

Nice job on the high mileage!! Original drivetrain?? I'm just hoping to make it to 300k. Only 91k to go!

Post by **regent** » 13 Mar 2012, 18:04

Glad you sorted it!

940 searching idle in cold weather

Re: 940 searching idle in cold weather