450 se 1973 surging - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 06-04-2004, 03:52 PM Thread Starter
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450 se 1973 surging

I Ihave a 1973 450 se ij pretty good shape. A few months ago I got gas at a station that had been closed for several years. It was raining and thwe car ran terrible surging frequently. It seemed to go away after a few tank ful of gas. It reappeared not as obvious but it still has a flat spot during operation under 65 mph.I checked the points seem to be ok. It doesnt happen all the time its intermittent. Could it be the coil? Any other ideas? Thanks
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post #2 of 3 (permalink) Old 06-08-2004, 08:05 PM
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RE: 450 se 1973 surging

fuel pump/check valve?

how does it start? a little hard?

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post #3 of 3 (permalink) Old 05-06-2005, 09:55 AM
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Vehicle: 1974 Mercedes 450SL, 1975 Rolls Royce Silver Shadow
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RE: 450 se 1973 surging

The ECU in these can be problematic. Its a whole board of trasistors that does what a chip does nowadays. Good luck finding one!
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