W123 300 emmissions tips

dazdread

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Jun 9, 2006
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Hi there,

MOT time here in the UK and I was wondering what tips you all have to get smoke levels down. After fixing all the issues from the first MOT it missed the retest cut off and 140 miles later failed its second full test on emmissions.

It failed at 4.93 M -1 with 3.00 M -1, it's an 1983 so does need a metered test :-(

My plan is

Adjust tappets
Change air filter
Moly diesel purge through engine

Is there any way of limiting the fuel injector to reduce the fuel input, is there a rev limiter?
 

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