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Discussion Starter #1
HI guys I recently had a problem with crankcase pressure .I had a great
thread from ALI 330D. advising me to clean the breather filter so changed
the filter and air filter and it solved the problem but I have found the mpg
has gone from 29/30 urban to 24/25 should I clean the egr valve or is there
something else I am missing
cheers. JOHN.L.
 

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Is the MPG drop in real figures or just data from the OBC, as it can sometimes be speculative at best!

As said give the EGR valve a good clean, marigolds at the ready cos its a filthy job, btw is the cars coolant temp ok?
 

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Ive known the MAF to cause a big drop in mpg, take that off and spray some brake cleaner on it, mines showing about 41 mixed driving, so id say i could easily get 35 around town
 

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Also, it sounds daft, check all your tire presures, my mpg went up 1-3mpg by pumping up the tyres to the right presure. The MAF is an easy fix if it works. Also, you can unplugg it whilst the engines running, if it DOESNT make a difference to the engine running, its shot and you need a new one ;)
 
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