So fixed the clogged cat in this car. Alas, now she will sputter out if I do not keep the RPMs over 1000 until engine temp hits 40C. Also have white/grey smoke until operating temp.

Does this sound like leaky injectors? Time to rebuild?

Could this also cause more knocking than my 87 300TDT?

Thank You!

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1987 300 TD - Kraut
1987 300 D - Hans

Geez...sounds like you got it running.... I had the sedan 87 300 D...many years ago...You mentioned injectors here and I think I could add something, but based on your short mention of more detail, injectors may not be your only concern.

Original Bosch injector *made in Germany* made for your OM603, may be near impossible to find. What has been available in recent years are rebuilt Bosch injectors utilizing inferior 'India made' injector replacement parts....Results reported are inability to balance injectors properly inducing rough idle and poor performance. Bosch so far as I know, no longer manufactures the injectors. Many people opt to simply have the old original Bosch injectors taken apart, cleaned and then balanced....Often they are far better than the India rebuilds.

I'm not sure who's on Mercedesshop anymore, but a fellow poster named Larry Bible, could share more light. I think you have other issues going on with your om603....but as always, start diagnostic from the las known issue. Be prepared it may go quite far...

How are your glow plugs? That's would be next to check!

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92 e300d2.5t
01 e320
05 cdi
85 chev c10

gp, timing, compression

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

Goofy question. Why glow plugs? I was under the understanding that glow plugs are there to pre-heat the cylinder for that first start when cold. Do they serve more purpose than that?

Winmutt, I will search for a good thread to check the timing.

Thanks for the insight!

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1987 300 TD - Kraut
1987 300 D - Hans

Does this IP have the pneumatic idle speed increase system fitted? If so is it working?

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

You have lots of white smoke until the engine reaches 40 degrees which could likely be glow plugs. Yes GPs are used to assist startup when the engine is below operating temperature.

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92 e300d2.5t
01 e320
05 cdi
85 chev c10

Tried a purge? Liqui-Moly works really well but can be pricey/tough to find. Seafoam works not quite as well but is $6 a can at sprawl mart.

The 87 does not have afterglow. The glow plugs only run until you crank and that's it.

The OP needs to rebuild his injectors and possibly replace the nozzles.

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CENSORED due to not family friendly words

Perhaps his GP relay is not working so he does not get a glow which would account for his white smoke. Try the simple things first.

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92 e300d2.5t
01 e320
05 cdi
85 chev c10

Maybe. When I had 2 dead glow plugs the smoke went away after 15 sec and it idled without any throttle input. Its easy to test the GPs by measuring resistance between the 6 pin plug at the relay and GND.
I still think its an injector issue.

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CENSORED due to not family friendly words

Did a diesel purge last weekend. Will post pictures of what is left in the container. Black and yucky!

Went out today and replaced the secondary (screw on) filter. Filled it with diesel before re-attaching. Car started after 3-4 attempts.

Replaced return line from filters to the tank. Old line was very brittle. New line is much better.

Attempted to start again approximately 1/2 hour later. She cranks but does not catch. Could I have introduced air into the system via the return line?

Also, one of my son's was connecting the passenger side headlight. I purchased $100 euro's and they did not have a wiring diagram. My 16 year old got it working!!! (Should not be related but thought I would mention...)

Any ideas?

Happy Monday!

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1987 300 TD - Kraut
1987 300 D - Hans

More than likely air. Loosen all the hard lines at the injectors, crank with the accel. pedal held to the floor, as you get fuel at each injector tighten up the lines.

Don't be afraid to crank for up to thirty seconds at a time, the starter is massive and built to take that, but give it about a minute to cool off between cranking.

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Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC