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Reliable way to diagnose vacuum leak? 850

posted by  stkelly on  Wed Jan 29 10:03 CST 2003
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last visit: Fri Aug 31 18:55 CST 2012
[RELATED]

I have an intermittent problem that I've been going to great lengths to try and solve. When I come to a stop during the first 10 minutes of driving, the car will intermittently (not every stop) idle low. It only does this in cold weather (below 35 degrees). It's low enough that it feels like it could stall but it never does. I have no idiot lights currently and when I checked the computer there were no codes in any sockets. When I floor the car I can feel some surging during the acceleration. Correct me if I'm wrong, but this is why I think it's a vacuum leak problem. I feel like I've looked over every single elbow and plastic tubing and have found no holes. The car does have 107K miles and some of the plastic tubing and elbows are original (I’m original owner). Could an elbow that's collapsing cause this problem? Should I just replace all elbows and plastic tubing? If that's the case does anyone know where I can get all of the elbows and tubing for a reasonable price? Could the hole clogged up to the EGR valve cause this problem? Finally, is there any tool I can hook up that would give me a good indication that I do indeed have a vacuum leak?

Thanks in advance
Scott K

1994 850 Turbo
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Scott K - 1994 850 Turbo






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