so...My GPF light came on 2 days after buying the car (used 1 yr 7k miles)
MPG dropped massively, didnt notice too much change in performance
took it back to the dealer in anger and just so happened it switched off by the time I got there.
So anyway...ive done some digging/reading, few posts on here in the past about people having the GPF light come on quite a few times in the stinger and other models and various discussions/confusion about why and what to do with it. others have also noted a drop in MPG/performance. thought id share what I read as may help to clear some confusion
Full article:
The Gasoline Particulate Filter FAQ | | Hypermiling | Fuel saving Tips | Industry News | Forum
summary if you dont want to read the link:
1: Comparing to DPF: GPF has lower capacity, which may explain why it comes on more frequently
2. Passive regeneration, needs high temp and oxygen. however, Petrol engines burn most of the oxygen so regen cant really happen while driving, so it happens on deceleration (since engine still running but without burning petrol so higher O2 concentration available in exhaust)
3. Active regen: occurs if passive fails (e.g. not enough time in deceleration). GPF light comes on, air/fuel mixture changes to forcefully increase amount of oxygen available in exhaust to allow regen to occur (prob explains the drop in MPG and performance)
So to avoid the light coming on (or if it does come on), from what ive understood from the above and other articles is...
its not the fast driving/harsh acceleration on sport that causes regen - but the deceleration
so go up to high speed then just take your foot off the pedals and let the car slow down a bit (as long as its safe to do so!)a few of these passive decelerations every now and then should prevent it clogging up.
on the other hand long motorway miles with constant foot on pedal and without much deceleration prob more likely to cause GPF light to come on.
anyway hope that helps
MPG dropped massively, didnt notice too much change in performance
took it back to the dealer in anger and just so happened it switched off by the time I got there.
So anyway...ive done some digging/reading, few posts on here in the past about people having the GPF light come on quite a few times in the stinger and other models and various discussions/confusion about why and what to do with it. others have also noted a drop in MPG/performance. thought id share what I read as may help to clear some confusion
Full article:
The Gasoline Particulate Filter FAQ | | Hypermiling | Fuel saving Tips | Industry News | Forum
summary if you dont want to read the link:
1: Comparing to DPF: GPF has lower capacity, which may explain why it comes on more frequently
2. Passive regeneration, needs high temp and oxygen. however, Petrol engines burn most of the oxygen so regen cant really happen while driving, so it happens on deceleration (since engine still running but without burning petrol so higher O2 concentration available in exhaust)
3. Active regen: occurs if passive fails (e.g. not enough time in deceleration). GPF light comes on, air/fuel mixture changes to forcefully increase amount of oxygen available in exhaust to allow regen to occur (prob explains the drop in MPG and performance)
So to avoid the light coming on (or if it does come on), from what ive understood from the above and other articles is...
its not the fast driving/harsh acceleration on sport that causes regen - but the deceleration
so go up to high speed then just take your foot off the pedals and let the car slow down a bit (as long as its safe to do so!)a few of these passive decelerations every now and then should prevent it clogging up.
on the other hand long motorway miles with constant foot on pedal and without much deceleration prob more likely to cause GPF light to come on.
anyway hope that helps