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#1
11-01-2001, 07:27 AM
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91 300se - rough start
I just did a major tune up on my car. Runs very smooth. However, starting is a challenge. It takes more than a few cranks for all six to hit. When it does start, it runs rough for 3-5 seconds then smooths out. Any thoughts.
Thanks Robert Bell 1991 300SE 
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#2
11-01-2001, 01:16 PM
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Did the rough running after start-up exist before the tuning work?
__________________
Mike Murrell 1991 300-SEL - Model 126 M103 - SOHC "Fräulein"
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#3
11-01-2001, 01:20 PM
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Did you use platinum plugs?
Or copper core plugs? My 190E is going to get switched back from platinum to copper this week-end. Symptoms similar to you: needs a couple of cranks to start and is then "balky" for a second or so.
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#4
11-01-2001, 07:41 PM
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YOUR STUMBLE CAN BE CAUSED BY ONE OR ALL OF THE FOLLOWING
INCORRECT PLUGS---USE H-9DC OR H-9DCO DIRTY OR LEAKY FUEL INJECTORS WORN VALVE GUIDES(OIL FOULING PLUGS) I'M GONNA CATCH HELL FOR THIS ONE---BURN REG. GAS MF
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