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1980 450SL
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41 Posts
Discussion Starter #1
My 1980 450SL had a weird idle problem when hot. The car ran fine when cold and for a while when it was warmed up. Then after 10-40 minutes the idle went south. Would drop below 500RPMs and constantly die when idling. Turn it off for a while it was fine until it warmed up again. A mechanic friend of mine thought it might be the catalytic converter. Just old. When it warmed up he thought it was clogging up the exhaust.

Well I changed my exhaust and eliminated the cats. Idle is just fine now. Antidotal but something to keep in mind.
 

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2010 Mercury Milan Hybrid, 1993 BMW 325i convertible
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6,077 Posts
Klonorg said:
Well I changed my exhaust and eliminated the cats. Idle is just fine now. Antidotal but something to keep in mind.
One might even call it anecdotal.
 
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