Mercedes-Benz Forum - View Single Post - 300sl hot start problem
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post #1 of (permalink) Old 02-15-2012, 12:24 PM Thread Starter
boulevardier
BenzWorld Member
 
Date registered: May 2010
Vehicle: 1991 300sl auto Red/parchment. 1982 300sd. Teal/beige
Location: Point Richmond, CA
Posts: 78
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(Thread Starter)
300sl hot start problem

I have checked out a couple of other threads regarding my problem - but none of them came to a definitive conclusion. 1991 300sl, 175xxx miles, fairly well taken care of over the years (I'm not the original owner). Cold starts are fine (takes a couple of clicks) smooth idle, smooth acceleration. Hot starts within a few minutes of shutdown are also fine - smooth idle, etc. It's a hot start after the car has sat for about 5 mins or more that become difficult. Hard to start (usually feathering the gas helps) and then there is a low speed "miss" which evens out at higher rpm's - when the car goes back to idle, the roughness returns - this can go on for several "stop and goes" and then it eventually evens out again. I sometimes detect gas fumes -but not always. Recently changed dist. cap and rotor (as well as the distributor suppressor plate - which some threads indicate can be a problem). Ran some injector cleaner. Checked fuses for corrosion, cleaned the heat sensor contacts. None of this has helped.
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