Petrol Diagnostics: Re: mercedes 420sl 1988 4.2 bosch ke3.1

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Re: mercedes 420sl 1988 4.2 bosch ke3.1 Archived Message
Posted by Paul Gunstone <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT5530' width='330' height='300' border=0 style='border:none;'> on February 25, 2008, 8:52 pm, in reply to "mercedes 420sl 1988 4.2 bosch ke3.1"
Hi Mike,
Remove the the battery Negative & then the Massive air cleaner from the middle of the motor, you will then clearly see the Idle Speed Control Valve. Remove this and thoroughly clean in a good solvent (be careful though as the valve is now NLA).Re-assemble & re-connect battery, start the vehicle & allow to idle for a good five minutes before test driving. You are right with regards to diagnostic comms as this is all done with the use of an analogue multimeter and with a dwell reading for diagnostics. My past experience with these though has taught me to avoid them at all costs as they are now very old, very worn & very hard to get the spares for!
HTH with your decision Mike,
Gunner.

Message Thread:

mercedes 420sl 1988 4.2 bosch ke3.1 - mike howdle February 25, 2008, 8:11 pm
Re: mercedes 420sl 1988 4.2 bosch ke3.1 - Paul Gunstone February 25, 2008, 8:52 pm
Re: mercedes 420sl 1988 4.2 bosch ke3.1 - Mark Carter February 25, 2008, 9:27 pm
Re: mercedes 420sl 1988 4.2 bosch ke3.1 - andyhyoung February 25, 2008, 10:55 pm
Re: mercedes 420sl 1988 4.2 bosch ke3.1 - mike howdle February 26, 2008, 6:55 pm
Re: mercedes 420sl 1988 4.2 bosch ke3.1 - andyhyoung February 26, 2008, 7:47 pm
Re: mercedes 420sl 1988 4.2 FIX - UKAT5172 February 29, 2008, 5:49 pm