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  #1  
Old 03-16-2009, 09:48 PM
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Low RPM on 1987 300D

Already switched out the OVP relay, the dial doesen't affect the rpm at all. RPM is at around 510 at idle.
Any other suggestions?
Thanks

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2005 E320 CDI
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  #2  
Old 03-16-2009, 11:08 PM
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Check the wires and connector at the red plastic device on the aft end of the IP.

Sixto
87 300D
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  #3  
Old 03-17-2009, 08:19 PM
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Excellent suggestion, removed the connector from the IP and a left wire
just popped out of it!! I was able to secure the wire to the to the connector and I now alot better RPM! I have the dial set on 6 but my rpm is actually about 540, it's alot better from 480 I was getting before but is there something else that might affect it?
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Old 03-18-2009, 04:37 PM
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Base idle might be off.

Sixto
87 300D
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  #5  
Old 03-18-2009, 04:46 PM
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Quote:
Originally Posted by sixto View Post
Base idle might be off.

Sixto
87 300D
x2
I had to bump my mechanical idle up a little bit. Not hard at all, I think the nut is a 6mm IIRC. The stock ELR setting is 4, which when set up with the mechanical idle should give you about 680 +/- rpms. (off the top of my head)
Of course, you are free to choose whatever rpm you like. Mine was shuddering when cold because the ELR would shut off for a second when I let off the gas with a cold engine, and it would bog down to about 480-500. Increasing it a little bit fixed that problem.
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2005 E320 CDI - 246k
1987 300SDL TD05-16g, Herlevi pump, Elbe manifold, 2.47 LSD - 213k
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  #6  
Old 03-18-2009, 05:00 PM
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85 300D 4spd+tow+h4
 
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blackcdi: you realize that dial only affects reported RPM not actual RPM right?
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  #7  
Old 03-18-2009, 05:05 PM
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If it doesn't affect actual rpm it affects reported rpm and engine sound because the engine hums at a different frequency when you dial in a different setting.

Sixto
87 300D

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