Lately at night and in the mornings it's been 25-35F. On cold start, the car will fire right up, but randomly miss on a cylinder or two for a minute while sitting there. If I just take off immidately it's fine as it warms up quicker.

As stated by an earlier post, I have really bad injector knock and need my injectors serviced - do you think this problem is related?

Easy stuff maybe. Is it possible you just have one bad glow plug? When's the last time they were checked/replaced?

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Seth

1984 300D 225K
1985 300D Donor body
1985 300D Turbo 165K. Totaled. Donor Engine. It runs!!!
1980 300SD 311K My New Baby.
1979 BMW 633csi 62K+++? Dead odo

Glow plug indicator works fine.. and I am under the assumption my car will tell me if I have a bad glow plug in the display.

Do the newer models tell you if only one is bad? I know on my model it may take two or three for the indicator light to go out.

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Seth

1984 300D 225K
1985 300D Donor body
1985 300D Turbo 165K. Totaled. Donor Engine. It runs!!!
1980 300SD 311K My New Baby.
1979 BMW 633csi 62K+++? Dead odo

I don't know if the glow plug light is a reliable indicator of a bad glow plug. I recommend that you do a resistance test on your glow plugs using a multimeter. It only takes a minute.

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2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL

Check the fuel lines for air bubbles. My car did the same thing...over time the problem became much worse.

What I do on mine, even after the glow light goes out after a few seconds, I still let it sit in the "pre-glow" position for another 10 or so seconds. maybe longer depending on the temperature before cranking. I've found my car to start up smoother and easier after doing this. AS we know even though the lamp goes out, the glow plugs are still glowing for some time even after started.... TurboD, I know you know that

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#dieselFLEET
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'97 E300
'99 E300

I did that, too.

I just replaced all my plastic fuel lines.. no leaks.

I agree, on my 617 turbo the light doesn't tell you until you lose 2 or more GPs. I can usually tell if I have one bad GP because it will miss on one cylinder for the first few seconds after a cold start.

He's talking about a '98 though. On my '99, same engine, one bad plug and the glow plug trouble light goes on.

Len