How does the ECM control boost pressure on the TD5? There are no electrical components on the turbo as it is driven off exhaust gases. I ask as my 90 has an intermitant fault sometimes it goes great pulling very well from 1000 revs and other times it seems to pull far less well as if lower on power or boost. Also when it is not behaving the engine sounds different, it appears to rattle more instead of a nice deep engine note(lack of turbo boost present?). If i turn it off for a couple of minutes and then re start usually it runs fine again???? Had anew turbo and MAF sensor...systematically renewing all the sensors under the bonnet. Oh yes, EGR disconnected to eliminate this from the equation.
Thanks
Ian
Thanks
Ian