Lexus IS220d lack of power, sometimes..

Scienceless

Any advice appreciated,

Driving a 2008 Lexus Is220d sport, 120,000kms done, last 100,000kms by myself. Never had a problem with this car until now, have had it since 2010.

It gets plenty of motorway driving, and has been serviced on time every time by Lexus.

In the past couple of weeks, and only after sitting in traffic for a while (not moving) the revs start to dip/rise a little, repeatedly, and when pulling off after that there is a complete lack of power.

It comes back to itself after a few minutes and drives fine once moving. There is no smoke and no lights/warnings on the dash at all. After being parked up for a while and driven again its 100% on the open road or motorway. Fully responsive and full power.

Any advice appreciated, I'm thinking sensors, or EGR, I'm aware these cars can be troublesome.

corglass

Scienceless wrote: »

Any advice appreciated,

Driving a 2008 Lexus Is220d sport, 120,000kms done, last 100,000kms by myself. Never had a problem with this car until now, have had it since 2010.

It gets plenty of motorway driving, and has been serviced on time every time by Lexus.

In the past couple of weeks, and only after sitting in traffic for a while (not moving) the revs start to dip/rise a little, repeatedly, and when pulling off after that there is a complete lack of power.

It comes back to itself after a few minutes and drives fine once moving. There is no smoke and no lights/warnings on the dash at all. After being parked up for a while and driven again its 100% on the open road or motorway. Fully responsive and full power.

Any advice appreciated, I'm thinking sensors, or EGR, I'm aware these cars can be troublesome.

It's either a blocked fuel filter or blowback at the injectors.

The fuel filter is the most likely cause given the milage. The filters on these cars are tiny so need much more frequent changing than other cars.

If it happens again, cycle ignition a few times without starting to prime fuel system.

Audioslaven

Scienceless wrote: »

Any advice appreciated,

Driving a 2008 Lexus Is220d sport, 120,000kms done, last 100,000kms by myself. Never had a problem with this car until now, have had it since 2010.

It gets plenty of motorway driving, and has been serviced on time every time by Lexus.

In the past couple of weeks, and only after sitting in traffic for a while (not moving) the revs start to dip/rise a little, repeatedly, and when pulling off after that there is a complete lack of power.

It comes back to itself after a few minutes and drives fine once moving. There is no smoke and no lights/warnings on the dash at all. After being parked up for a while and driven again its 100% on the open road or motorway. Fully responsive and full power.

Any advice appreciated, I'm thinking sensors, or EGR, I'm aware these cars can be troublesome.

Hi,

Clean the EGR value. A friend has a 2010 model and there was a lack of power so he took off the ERG valve and cleaned it. Power was restored.

5W30

corglass wrote: »

It's either a blocked fuel filter or blowback at the injectors.

The fuel filter is the most likely cause given the milage. The filters on these cars are tiny so need much more frequent changing than other cars.

If it happens again, cycle ignition a few times without starting to prime fuel system.

Given that it was serviced at Lexus, the fuel filter should be fine.

corglass

5W30 wrote: »

Given that it was serviced at Lexus, the fuel filter should be fine.

Disagree. The fuel filter on these cars are tiny. They're also incredibly difficult to replace. Lexus don't always replace these during factory services even if they claim they do.

I'd change the filter. It's a cheap way to establish what is, the most likely cause

PADRAIC.M

I don't know of any Lexus garage that would not change the fuel filter every 70k, but in my experience 80% of the time it's pebbles of carbon sitting in the egr valve, I have changed fuel filter for a similar issue but it's usually a high gear and low speed where the filter issue arises- like going up a hill @50km in fifth gear. The lack of power up to 2,250rpm is the egr.

Waterson

The Egr valve isnt actuated at idle. If it were stuck open, as is the suspician above, would it not be idling poorly at all times? Chances are the incorrect feedback from the sensor would trigger an engine management light also, no? Im certainly not saying it isnt carbon build up around the seat of the valve but the intermittent nature of the problem would make me more inclined to look elsewhere...OP can you get a diagnostic plug in done? You could then check EGR feedback values at the point of the idle fluctuation/power loss issue and know whether the valve is acting up?

bbability

its carbon build up. clean EGR Valve is the way to go first. if problem persists check manifold for build up. An old school mechanic who isn't afraid to get his hands dirty will have that car running like new in no time. People rely on Diagnostics too much these days. Don't be afraid to get the hands dirty.

Dale Parish

Consider also the maf...

Waterson

bbability wrote: »

. People rely on Diagnostics too much these days. Don't be afraid to get the hands dirty.

Diagnostics in the right hands save people time and money. Knowing system designs and what problems might cause the symptons also saves unecessary parts changing and old school guesswork.

bbability

Waterson wrote: »

Diagnostics in the right hands save people time and money. Knowing system designs and what problems might cause the symptons also saves unecessary parts changing and old school guesswork.

Is that so...

Here's a real life example of such Master Craftsmanship. Pal of mine has a Kia Ceed 1.7CRDI 2007. No Poke similar issues as above with this Lexus. I advised him to bring it to a mechanic we both know is what I call "old Skool" but instead he brings it to a Diesel Specialist. They plug into the computer and send him a bill for €400 for a new MAF. Car was not cured of issue and was exactly the same to drive. So he reverted to Plan "A" and would you believe it the EGR valve was completely blocked and the Manifold was no better. Washed and cleaned the car is 90% better than it was. There is an issue with the turbo which is down to a sticky waste gate but maybe in time it with love and care it will get better. Total cost for clean and repair for Plan A €100.
Two things. One if the big fancy garage had rolled up their sleeves and done the basics first they would have realised it was not a MAF. The computer is a great thing but the person using the computer needs to know what they are looking at too! you have to get your hands dirty now and again

Waterson

bbability wrote: »

The computer is a great thing but the person using the computer needs to know what they are looking at too! you have to get your hands dirty now and again

You said it, stick a monkey in front of a typewriter and that sort of thing.

biko

Seems pretty clear this won't be a DIY effort, moved to main forum.