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Gday my old man has a 98 mdl nav,it has the QD 32 engine ,lately it has been chewing a sh#tload of fuel,we have changed all filters and has made no difference,i have heard that the EGR valve tends to stick on these.
Can anyone confirm this and where and how can i fix it<
Your help would be appreciated cheers
How many KM has it done? Its more likely that its time for the injectors to be tested/rebuilt if required and the pump adjusted to suit how its been wearing.
i'm not that familar with those motors. however some i think some are fully ecu controlled. no pumps tp tweak. just pay to check if its mechanical pump or not and if it has egr (look for pipe going from exhaust to inlet).
any smoke ?
if so what color and when do you see it?
check the filter on hte injection pump, i know on td42's they are a quick job usually costing about $30
are you finding a lack of power or just incresed fuel consumption?
black smoke + lack of power.
most likly intake restriction ie blocked filter or crushed intake.
2nd, egr stuck open (if it has one).
otherwise injectors
lastly if its had some work done on it, cam or injection timing is out.
He has just told me,they realised it started using more fuel after picking dodgy fuel up,they had cleaned everything out and new filters and put some cleaner additive in.The problems still there.
It has to be injectors i think.
as i said check injector pump filter is veeeeerrrrrryyyyyy common prob that isnt picked up on quickly, change all filters oils only to find fault still there
