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Old 01-13-2008, 09:42 PM
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Join Date: May 2000
Posts: 35
Rough warm idle and low end.. 75 450 SL

I'm trying to procede in a logical manner to solve this problem. The engine starts well, but when warm and in drive with the brake on, idle is rough, and stays rough untill about 25 mph, then smooths out ok. I have replaced and adjusted the points, and set the timing. It would seem logical to check the plugs next, and maybe clean the electronic ignition trigger points in the distributor. Any other ideas? Thanks upfront, Dusty

75 450 SL
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Old 01-14-2008, 10:59 AM
meltedpanda's Avatar
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Join Date: Mar 2003
Location: Central Ky
Posts: 6,154
you can clean the trigger points and make sure your plugs are teh right heat range and gapped properly but mine never smoothed out until I had the injectors refurbished and I replaced all the rubber under the hood ( this car is very vacuum dependent)

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