I have had my MKIV for 5 years now and have logged every tank of fuel in the car. In the last 12-15 months I have seen a steady dropoff in MPG's. I used to get high 40's consistently, and now have consistently been in the low 40's.
It is a stock ALH with EGR delete about 4 years back. Nothing has changed with maintenance or the way we drive. I do a can of diesel purge every 20K, just did fuel & air filter, no change. The only thing that is manifesting itself is some smoking on hard acceleration. Think on ramp and merging into traffic. It usually will smoke some, and never used to. There are no faults in the ECU.
Is this the early signs that the nozzles are getting worn? They are original and I now have 190K on it.
Thanks for any input you can offer!
It is a stock ALH with EGR delete about 4 years back. Nothing has changed with maintenance or the way we drive. I do a can of diesel purge every 20K, just did fuel & air filter, no change. The only thing that is manifesting itself is some smoking on hard acceleration. Think on ramp and merging into traffic. It usually will smoke some, and never used to. There are no faults in the ECU.
Is this the early signs that the nozzles are getting worn? They are original and I now have 190K on it.
Thanks for any input you can offer!