Re: [MBZ] Rough idling '83 300D
In a message dated 2/16/2007 5:41:25 A.M. US Mountain Standard Time, [EMAIL PROTECTED] writes: My '83 300D idles very smoothly when started cold. After it's warmed up, it idles roughly. After 5 or 10 miles on the highway it will sometimes sound like a cylinder is missing. By the time I get home and crack the injector lines, it is always idling better. I took along wrenches and cracked the injector lines along the road when it was missing badly. I could not tell which cylinder was worse. Each cylinder definitely began missing as I cracked the lines. I am wondering if the problem is most likely to be injectors, injector pump seals, a compression problem, or something to do with injector pump adjustment. The fact that it idles so perfectly when first started seems strange. Have you blocked your EGR valve? Not just plugging the vacuum line, but actually putting a thin plate over the hole. Sometimes the egr will leak through and lean out one cylinder, more than the others. Jim Friesen Phoenix AZ 79 300SD, 264 K miles 98 ML 320, 147 K miles I put a copper plate in behind the EGR valve gasket at the intake manifold and just now got back from town (28 miles). It still idles rough after warming up; no change. Jim Cathey suggested that there might be air leaking into the fuel system but I'm not sure how to check for that. It definitely idles like one cylinder is weaker than the others. Thanks, Jim. Gerry Archer '83 300D and 240D
[MBZ] Rough idling '83 300D
My '83 300D idles very smoothly when started cold. After it's warmed up, it idles roughly. After 5 or 10 miles on the highway it will sometimes sound like a cylinder is missing. By the time I get home and crack the injector lines, it is always idling better. I took along wrenches and cracked the injector lines along the road when it was missing badly. I could not tell which cylinder was worse. Each cylinder definitely began missing as I cracked the lines. I am wondering if the problem is most likely to be injectors, injector pump seals, a compression problem, or something to do with injector pump adjustment. The fact that it idles so perfectly when first started seems strange. Thanks, Gerry Archer '83 300D and 240D
Re: [MBZ] Rough idling '83 300D
In a message dated 2/16/2007 5:41:25 A.M. US Mountain Standard Time, [EMAIL PROTECTED] writes: My '83 300D idles very smoothly when started cold. After it's warmed up, it idles roughly. After 5 or 10 miles on the highway it will sometimes sound like a cylinder is missing. By the time I get home and crack the injector lines, it is always idling better. I took along wrenches and cracked the injector lines along the road when it was missing badly. I could not tell which cylinder was worse. Each cylinder definitely began missing as I cracked the lines. I am wondering if the problem is most likely to be injectors, injector pump seals, a compression problem, or something to do with injector pump adjustment. The fact that it idles so perfectly when first started seems strange. Have you blocked your EGR valve? Not just plugging the vacuum line, but actually putting a thin plate over the hole. Sometimes the egr will leak through and lean out one cylinder, more than the others. Jim Friesen Phoenix AZ 79 300SD, 264 K miles 98 ML 320, 147 K miles
Re: [MBZ] Rough idling '83 300D
I am wondering if the problem is most likely to be injectors, injector pump seals, a compression problem, or something to do with injector pump adjustment. The fact that it idles so perfectly when first started seems strange. Minor air leak into the fuel system as it warms up? -- Jim
