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#1
10-20-2003, 05:24 PM
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W123 with 110 engine - FI Refit - Parts Needed?
If I was interested in refitting the six fuel injectors on my 280E, (K-jetronic) what do I need?
Parts listed with the injectors include o-rings, seals and holders in addition to the injectors themselves. Looks to cost around $30+ for each set of the above. Should I do the lines up to the injectors at the same time? Anything else while I am at it? This is one of those "peace-of-mind" projects where once done, I have a baseline on what not to worry about. The car runs like a champion, especially at 70. The only problem I have that urges me to do this is poor warm-engine starting. I have worked at other areas of this problem, so I am running out of possible remaining causes. There is some suspicion that the injectors are flooding the cylinders, making the warm-start difficult. Also, isn't 25 years on one set of injectors justification for replacement, despite having only 49,000 on it? What do you think?
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'78 W123 280E, 58,000 mi! '97 Mazda Miata '94 Isuzu Trooper, 4WD '03 MB C240 4-matic Wgn - Wife's From the Archives: '73 2002 '68 TR-250 '67 Austin Cooper "S" '59 Austin Seven (Mini) various p'up trucks Last edited by Apodman; 10-21-2003 at 09:26 AM. 
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#2
10-20-2003, 06:01 PM
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Your injectors are mechanical, not electric, I believe. I never heard of mechanical injectors "Going bad." I would just take them out and soak them in carb cleaner if I were you. Those are made to last forever - literally.
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Current: 2021 Charger Scat Pack Widebody "Sinabee" 2018 Durango R/T Previous: 1972 280SE 4.5 2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi" 1999 Chrysler 300M - RIP @ 221k
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#3
10-20-2003, 09:40 PM
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My '81 380SL had the same warm start problem, and new injectors and seals cured it. You have all the right parts. For $180, it is worth it to take that problem off the table, IMHO.
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Chuck Taylor Falls Church VA '66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
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#4
10-21-2003, 03:14 PM
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The K-Jet injectors go bad when they get plugged (there is an internal filter) or the nozzle gets worn and they dribble. Leaking injectors will give poor idle and hard warm starts.
Peter
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1972 220D ?? miles 1988 300E 200,012 1987 300D Turbo killed 9/25/07, 275,000 miles 1985 Volvo 740 GLE Turobodiesel 218,000 1972 280 SE 4.5 165, 000 - It runs!
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