Hey all,

I recently serviced the following on my Diesel engine and concerned about the latter: MAF sensor clean with Liqui Moly MAF sensor cleaner, air filter change, fuel filter change, and Liqui Moly 500mL fuel system purge via fuel lines.
All of these were done successfully with no problems encountered. I kept the fuel line in the mason jar when purging the system without sucking in air at all. No leaks coming from fuel lines either when engine is running.

Results:
- My idling was at 0.6l/h and is now 0.8-1.0/h… does not change.
- Average fuel consumption was 5.9l/km and is now 7.2-8l/km with 50-60km/hr speeds.
- When idling, the 0.0l/km reading increases every 10 seconds, doesn’t stop and can keep going until it maxes out. I recall is wouldn’t change values until I acc understand this is not a reliable source of readings, but a change has developed since the recent service that I have performed so I’ve done something wrong here.
I’ve disconnected the battery to reset the ECU but hasn’t helped.

Is the MAF sensor faulty? Does this go away when the liqui moly is depleted from the system? I sprayed the MAF sensor without contact and allowed it to dry.

Appreciate the upcoming feedback.