D4D Post Egr Clean Fuel Economy Drop

[LeeW]

Hello,

I've recently had trauma with my 2003 Avensis T3X. First the engine light came on, the fault code pointed to the EGR valve, so I took that off and cleaned it. All was well, then the light came back on. The workshop manual pointed me to the intake shutter valve, so I bought a brand new one from Toyota and set about replacing it. During the replacement I noticed that he wires on the plug to the intake shutter were damaged and one had broke. So i repaired the wire and the car has run lovely since, no more black smoke when I boot it and it generally drives fine. However my mpg has dropped from a fairly consistent 53mpg to 45mpg. First I thought it was because I'd had the ecu disconnected over night whilst dismantling the engine - i thought I it would settle down after a few tanks of fuel but no change.

The car is due a service, but it seems odd that its dropped suddenly after parts replacement.

Any one experienced anything similar?

Cheers

Lee

[Sam29]

I would also like to know the answer of it.

I bought used MK2 Avensis, and without checking the MPG, I cleaned EGR staright away. The reason to do was ocassional non-responsiveness of the car. Plenty of helpful people here suggested to clean egr valve which I did. The problem setteled but I am not sure if I am getting the right MPG (as I never noticed/ considered it before cleaning egr).

Cheers.