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Old 10-27-2003, 10:42 AM
vince vince is offline
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Join Date: Jan 2000
Location: Chesapeake, VA
Posts: 396
I just did this job on my 1995 C280 - 141,000 miles. The last 20-25mm of the pipe was plugged solid. I don't know how anything was getting through it and yet I hadn't gotten a code. I took Gilly's advice and replaced the tube. I did try cleaning it on the engine using Steve B's method and another suggested on this forum - a copper tube guide with a cable forced through on the intake manifold side. I wasn't satisfied that I did a satisfactory job. Replacing the tube is tedious, but there are worse jobs. One note, you can see the intake manifold end of the tube by blocking open the throttle plate and using a small mirror.
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