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#1
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Bluish smoke and idles rough only when cold
I recently purchased a super clean 126,000km , 92, 300D 2.5 Turbo. It blows bluish smoke and idles rough (like a miss) only when cold. All the glow plugs were replaced in Apr/04 by the local MB dealer according to the invoice from the previous owners records. Any ideas where I should look?
Thanks. PD |
#2
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Threads to read
ShopForum > Technical Information and Support > Sticky: Organized MB DIY Organized MB DIY links
post: * Cooling System: * Diesel Injection: + Drive Belts * Engine Electrical: * Fuel Delivery system:
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
#3
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Just because glow plugs were replaced a year or two ago doesn't mean one, two or all aren't bad again. Some lesser brands don't last that long, and with the systems that keep them glowing for a couple of minutes after startup they seem to burn out faster.
Many threads to search for on how to check this.
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Jimmy L. '05 Acura TL 6MT 2001 ML430 My Spare Gone: '95 E300 188K "Batmobile" Texas Unfriendly Black '85 300TD 235K "The Wagon" Texas Friendly White '80 240D 154K "China" Scar engine installed '81 300TD 240K "Smash" '80 240D 230K "The Squash" '81 240D 293K"Scar" Rear ended harder than Elton John |
#4
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I'd start with letting the glow plugs do their job well past the point where the glow plug light turns off. In fact just ignore the light and let the plugs glow for about 20 seconds. If that doesn't fix it, I'd check the glow plugs like Jimmy said.
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2004 VW Jetta TDI (manual) Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL |
#5
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yeah
classic glow plug symptoms.
do try the extra glow time though. it works like a charm on my 350. tom w
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC] ..I also have a 427 Cobra replica with an aluminum chassis. |
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