IS220D idle revs going up and down

[TheHairyBeast]

When idle after a drive the revs start to go up and down is this trying to do a dpf regen or this the first signs that dpf is having issues?

car gets used everyday on the motorway avg about 39mpg.

 

[jumbojake]

the idle revs can move around slightly due to electrical load .... (air con, lights etc) .... if you turn off the heated seats and turn off all fans... does it stabilise?

I've neve noticed the DPF regen happen in my IS 200d, maybe it does on long runs, but not noticed any change in the car behaviour or any indicators on the dash.

Do you see any smoke out the back ?   black smoke is often a sign of pending DPF issues... I had that in my old Toyota Avensis, along with poor acceleration at low revs.

[TheHairyBeast]

I did see white smoke coming out but I’ve seen it before and then it solved itself. Don’t have the heater or heated seats on a lot.

car only has 29k miles for a diesel very little. But it gets used a lot, everyday.

[TheHairyBeast]

46 minutes ago, jumbojake said:

the idle revs can move around slightly due to electrical load .... (air con, lights etc) .... if you turn off the heated seats and turn off all fans... does it stabilise?

I've neve noticed the DPF regen happen in my IS 200d, maybe it does on long runs, but not noticed any change in the car behaviour or any indicators on the dash.

Do you see any smoke out the back ?   black smoke is often a sign of pending DPF issues... I had that in my old Toyota Avensis, along with poor acceleration at low revs.

To note when heaters etc are off it does not stabilise.

[jumbojake]

ok, sounds like it is not related to electrical load, so maybe something in the fuel or combustion area.   

Do you notice power at low revs is less than before?   when I had this, there were clouds of black smoke out the back... sadly I didn't have the batman theme tune to go with it

white smoke is usually either water vapour (head gasket)happens all the time.......  or unburnt fuel (glow plugs), noticeable at startup, but shouldn't be when engine is warm

[TheHairyBeast]

When engine is warm everything is fine just after a drive it starts to go up and down and engine shakes but at 20k miles a new engine was put in under warranty head gasket is fine plugs are good.

[Thelongterm]

We had a similar issue with our other car (2010 Avensis), managed to sort it out by cleaning the throttle body.

[Lageoddvin]

I'd check the air filter as well.

[TheHairyBeast]

6 minutes ago, Lageoddvin said:

I'd check the air filter as well.

Has nothing to do with air filter.

Also problem was the DPF and EGR instead of opening the EGR and cleaning it bought cataclean for diesel and poured the full bottle into the tank and drove for 30mins. all good now. Going to get rid of the car and get a IS250 fsport.