1973 Mercedes Benz 450sl high idle at cold start

1973 MERCEDES BENZ 450SL
93,000 MILES • V8 • 2WD • AUTOMATIC
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450SLBLUES
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  • 3 POSTS
When the car is cold,it first takes about 10 seconds to start and then idles at 1500 to 1800 until the engine reaches about 175 degrees.Where do I start to resolve this problem.I already set the points and timing to spec. Thanks
Jul 16, 2009 at 11:07 PM
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BUDDYCRAIGG
  • ✓ASE Certified Mechanic
  • 2,262 POSTS
  • ASE Certified Mechanic
does the car have a carburetor on it?
if it does, it sounds like the choke AND the fast idle cam is not set (or moving) correctly.

with only 93,xxx miles on a car that old, i wouldn't be a bit surprised if the carb was gummed up.
Jul 17, 2009 at 12:04 AM
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