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Old 09-17-2001, 01:48 PM
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Join Date: Sep 2001
Location: Austin
Posts: 28
Unhappy 1991 300 Sl

91 300 SL with 80,000 miles.

The car bogs as if it is starving for fuel or possibly air when the outside temperature is hot (>85). The problem has nothing to do with engine temp. I've replaced all normal tune-up parts, the fuel distributor, the voltage overload relay as well as the air temp sensor. The car has been serviced by 5 shops including dealerships in San Antonio and Austin.

Its been mentioned that a faulty control unit will malfunction when it gets hot.

Anyone have any ideas?

Thank you.
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Old 09-17-2001, 06:57 PM
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Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
This is a somewhat common problem on the 300SL & 300CE, both use the same engine! Several things can cause the same problem, but the most common are the Flywheel(crank) sensor & the ignition coil!
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