Am having faults P0172 & P0174 telling me fuel is lean on left and right bank. The codes appeared at the same time, so today I changed the MAF, air filter & fuel filter and although better the fault is still there. It happens when I am slowing down (shut throttle) but will clear after a few seconds when driving off. So I suspect the fuel pump is on the way out. My guess is that the pump is stopping instead of reduced flow, causing lean burn for a few seconds. Not surprised since mileage is 95k so is probably original. Will order one unless you guys have a better suggestion.

hi

usually air leaks on the intake system somewhere, if its doing i on shut throttle could be the flexi on the egr

wont be fuel pump that would give a different fault code as fuel pressure is monitored with a sensor

when you take you foot off the throttle coasting the injectors are turned off, otherwise you get unburnt fuel down the exhaust, which would destroy the cats

cheers

Joe

Might have found it! Checked over the engine for vacuum leaks and found a hole in the engine breather. Replaced the hose length, will see if all is ok next run.

hi

looks possible, its usually leaks, and that age where they start to perish, especially if disturbed

cheers

Joe