[Engine] performance and egr issue

[popalazarou]

hello everybody,
 i have had a berlingo multispace desire 2litre turbo diesel for a couple of years now, i was hesitant as to whether it was something i was going to keep, but after this time im really starting to like it alot.  Recently i have had an issue which i think i saw on another thread where the vehicle hesitates around 45-55mph, it seems to me that the issue arises at around 30 in 3rd and 40 in 4 and 50 in 5th (seems to have a pattern).  would you say that the MAF needs replacing?? :huh:

Today i find that it seems the vehicle only revs up to about 2800rpm, it did seem to do this very intermittantly in recent weeks.  Would you agree that it is most likely the egr valve. :huh:   I have spent some money on this tub already, but im prepared to spend more as i have got quite attached to it. 

i have already changed all brakes discs shoes wheel cylinders and flexi hoses. new front struts and springs,new track rod ends,new 3pc luk clutch and cable, cambelt water pump and tensioners and alternator belt. just finished getting new handles for the sliding door as well both sides, (9 quid on ebay) dealer wanted 147 quid :exclamation: 

i also used wynns supercharge and flushed the oil as well. whats your opinion on that stuff?
used a cataclean diesel additive as well

[smutts]

Satan's little helper (also known as the EGR valve) usually works in partnership with a motorised throttle in the jntake.
These work with the info the MAF sensor gives.
Controlled by a computer.
The usual rules of GIGO (garbage in = garbage out) apply.

So who knows? Duff MAF might throw it all out, the EGR might have been changed in the past, but not been recalibrated.

Finding someone with Lexia with might be a good start.