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Old 04-28-2005, 09:10 PM
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Join Date: Sep 2001
Posts: 79
Cold hesitation is normal??

I finallly got my 85 380sl running almost like new.. I replaced (cap, rotor, wires, plugs, coil, ICV, CSV, OLV relay, fuel pump.) and still had the cold start and running rough problem. Finally bought the car to a mechanic recommended by the forum. It turned out to be a mixture problem. He adjusted the 3mm screw and run prefectly. However, after I get the car started, I press on the gas and it also stalled. Let go the gas and idle prefect. I asked him and he said it is normal during the spring time (50'-60' deg) Once the weather gets warmer, the hesitation will be gone.. He also said if I replaced the warm up regulator, it may improve a little bit.. Anything else I can do?????

Tony S....
98 MB E320
85 MB 380SL
01 Subraru Impreza (sold)
04 Toyota Highlander
82 25' W/A Cruisers
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Old 04-29-2005, 09:24 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153

Cold hesitation on that engine can be elimated with the correct fuel pressure adjustments! ON any CIS engine with warm-up regulator the fuel pressure MAP is temp controlled and must be with-in Bosch specs thru-out the warm-up process!

Many times a new warm-up regulator is required, BUT many times even a new regulator will require slight adjustment.

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