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Old 11-10-2003, 05:57 AM
Posts: n/a
Unhappy 250CE/8 > starting troubles

My 1970 250CE (Automatic) broke down (while driving). Motor didn't want to start again. Fuel comes, but after 2-3 seconds, motor stops.
Could it be bad quality of fuel (I do not drive a lot), the electronic fuel injection box ?
In the meantime the car hasn't driven for a year.
Can someone help me?
Belgian greetings
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Old 11-10-2003, 09:51 AM
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Join Date: Apr 2000
Location: Falls Church, VA
Posts: 5,316
Do you know what type of injection your car has? Is it CIS with a fuel distributor, or the older type with a mechanical pump mounted on the engine?

Regardless of the type, though, as a first step, you should drain the tank and put some fresh gas in it. Then you should disconnect a fuel line near the engine, run it into a container, and run the pump for at least 30 seconds to purge the old gas from the system. You should get a liter or so of fuel. If not, you need to change the filter element, clean the tank strainer, look for blockage in the fuel lines, etc. until you figure out why you are not getting fuel.

Once you have fuel to the engine, check for spark by pulling a plug wire off and holding it (use insulated pliers) an inch away from the block while someone cranks the engine. If you have spark, try a little starter fluid in the air intake while cranking the engine and hope for the best.

There are posts on the Vintage Forum detailing David Speed's efforts to get a similar car running after a five-year storage.
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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Old 11-10-2003, 05:38 PM
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Join Date: Jan 2003
Location: Sydney, Australia
Posts: 627
Originally posted by ctaylor738
Do you know what type of injection your car has? Is it CIS with a fuel distributor, or the older type with a mechanical pump mounted on the engine?
The 250CE had neither of these. It used Bosch D-Jetronic like the M110 (280E, CE, SE, SEL), M116 (280SE-3.5, 350SE, SEL, SL, SLC) and M117 (280SE-4.5, 450SE, SEL, SL, SLC) of the late '60s and early to mid '70s. Diagnosis would be similar to that for any of the other D-Jetronic equipped engines (ie. check for maintained fuel rail pressure around 30psi, listen for injectors "ticking" while opening throttle with ignition on or with engine cranking, check for ignition etc.).
107.023: 350SLC, 3-speed auto, icon gold, parchment MBtex (sold 2012 after 29 years ownership).
107.026: 500SLC, 4-speed auto, thistle green, green velour.
124.090: 300TE, 4-speed auto, arctic white, cream-beige MBtex.
201.028: 190E 2.3 Sportline, 5-speed manual, arctic white, blue leather.
201.028: 190E 2.3, 4-speed auto, blue-black, grey MBtex.
201.034: 190E 2.3-16, 5-speed manual, blue-black, black leather.
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Old 11-14-2003, 05:26 PM
David Speed's Avatar
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Join Date: Aug 2003
Location: Brisbane, Australia
Posts: 81
As always, good advice from Chuck………………if new fuel and changing your fuel filter doesn’t solve your problem, get a hand sprayer………set the nozzle to a single stream …….once you get it started try squirting fuel into the air intake (carefully -no smoking etc!!)……..if you can keep it running you have confirmed it is a fuel supply problem………don’t know anything about the D-Jetronic…..… 280CE has the CIS / K-Jetronic………..others should be able to help

Apart from everything else in my Vintage Forum threads, I had to pull my tank……..clean out an amazing amount of crud and replace the in tank strainer…………now running quite well and 500miles on the clock since the re-birth
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