Used home made diesel...Please help

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Nissan Xtrail 2004
model 2.2 DCI Diesel.
I used converted food
oil to diesel to run the vehicle. 

I used around 200-300
liters of this fuel. I then went back using normal diesel. 

After a week of using
standard diesel again the vehicle went in to limp mode when used in a
hill. 

I changed the fuel
filter and it improved. 

Now the vehicle goes in
to limp mode when driving along at around 2000rpm.  when driving at a
higher rpm the vehicle runs fine. 

I attached a fault code
reader and did a diagnostic test. The fault code that was returned
was P1273 (Air / Fuel Ratio Sensor 1)

The Xtrail also smokes
when driving it along. I notice the smoke in my side mirror when
driving normally not just when putting the foot down. 

What can the problem
be? I have cleaned the Mass Air Flow meter (it was needed, It was
very dirty)
I have also added
injector cleaner for diesel engines to the normal fuel. 

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Roger Members Profile Send Private Message Find Members Posts Add to Buddy List New Member Joined: 14 July 2010 Location: United Kingdom Status: Offline Points: 1	Post Options Post Reply Quote Roger Report Post Thanks(0) Quote Reply Topic: Used home made diesel...Please help Posted: 14 July 2010 at 21:05
	< http-equiv="CONTENT-" content="text/; charset=utf-8"> < name="GENERATOR" content="OpenOffice.org 2.4 (Unix)"> < style ="text/css"> Nissan Xtrail 2004 model 2.2 DCI Diesel. I used converted food oil to diesel to run the vehicle. I used around 200-300 liters of this fuel. I then went back using normal diesel. After a week of using standard diesel again the vehicle went in to limp mode when used in a hill. I changed the fuel filter and it improved. Now the vehicle goes in to limp mode when driving along at around 2000rpm. when driving at a higher rpm the vehicle runs fine. I attached a fault code reader and did a diagnostic test. The fault code that was returned was P1273 (Air / Fuel Ratio Sensor 1) The Xtrail also smokes when driving it along. I notice the smoke in my side mirror when driving normally not just when putting the foot down. What can the problem be? I have cleaned the Mass Air Flow meter (it was needed, It was very dirty) I have also added injector cleaner for diesel engines to the normal fuel.
	Many thanks Roger

aylnissan Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List New Member Joined: 29 December 2010 Location: United Kingdom Status: Offline Points: 7	Post Options Post Reply Quote aylnissan Report Post Thanks(0) Quote Reply Posted: 31 December 2010 at 11:17
	Sounds like classic Mass air flow sensor failiure, unfortunatly sometimes the only way to solve is to replace. Most of the other problems would cause stalling etc.....

Guests Members Profile Send Private Message Find Members Posts Add to Buddy List Guest	Post Options Post Reply Quote Guests Thanks(0) Quote Reply Posted: 31 December 2010 at 12:52
	the Maf has failed by the sounds of it Did you setup the engine for the home brew diesel ? did you make the diesel or did you buy it pre made ? if its home made ideally you need a diesel preheat before it enters the engine and secondary filtered