Redlines at 4 thou rpm

jam-mb

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mercedes c180 esprit
Hi

my 1994 c180 redllines at 4k rpm.. in all gears in all situations.. it did start with only doing it in 5ht and occasionaly.. cna anyone explain whats happened ?? cars still driveable just a tad annoying !

cheers

jam
 

television

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Is this when you are driving it or when parked
 
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jam-mb

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both m8.. originally it was only when under load now its all the time!
 

television

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It is normal to do that in P,,you do not have 5 gears it is 4 speed box,,not that this matters. When it cuts is it instant or does it splutter as though it was out of fuel
 
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jam-mb

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its a 5 speed manual? and its instant
 

television

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If it is instant the the fault must be around the fuel pump relay,,as it is this that has the limiter on it here 26 in this link,,but without checking the fault could be else where
 
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jam-mb

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its basically like the limiter is meant too be at 4 thou rpm.. almost like a safety mode?? going too change the relay.. checked plugs they seam ok.. leads are slightly rusty.. but i dont think this is problem although im not sure.... its slowly developed over time and hasnt just occured either..

hope the relay works :-(
 

kth286

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as it's going into limp home mode there will be fault codes available to read off the diagnostic plug.

Go to merc indie to get the codes read as a first step.
 

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