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Power Loss After Egr Clean


dnl_303
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Hi All,

My 2003 Avensis (2.0 D4D) was losing power intermittently, so after reading up on the forum, I decided to have a go at cleaning the EGR. The EGR was not too bad, and after cleaning, looked like new.

Whilst I was at it, I also dismantled the intake manifold and cleaned the throttle body as this was full of dirt and gum, and from previous experience on other car makes, this also helps. The turbo pressure sensor and the other sensor on the intake manifold just next to it (I suspect Manifold air temperature) were also full of oil and carbon, so I gave them a little squirt with Carb Cleaner as well.

After all this, car works really smoothly especially at idle, but the only problem is that the turbo stops boosting beyond 2000rpm, and it is EXTREMELY hard to get the car to accelerate beyond 20mph. It is like there is fuel starvation of some sort, or maybe the turbo somehow stops working and I get N/A 2.0 diesel instead!

I have disconnected the Battery for a while a couple of times to reset the ECU, and I have checked to make sure that all the connections and pipes are tight. No problems found. No Engine management light or other lights came on at any stage.

Can anyone help me please, as I've gone from having an occasional problem to a nearly undriveable car! Fuel filter should have been changed at last service about 2000miles ago.

Any help much appreciated please.

Daniel

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Hi All,

My 2003 Avensis (2.0 D4D) was losing power intermittently, so after reading up on the forum, I decided to have a go at cleaning the EGR. The EGR was not too bad, and after cleaning, looked like new.

Whilst I was at it, I also dismantled the intake manifold and cleaned the throttle body as this was full of dirt and gum, and from previous experience on other car makes, this also helps. The turbo pressure sensor and the other sensor on the intake manifold just next to it (I suspect Manifold air temperature) were also full of oil and carbon, so I gave them a little squirt with Carb Cleaner as well.

After all this, car works really smoothly especially at idle, but the only problem is that the turbo stops boosting beyond 2000rpm, and it is EXTREMELY hard to get the car to accelerate beyond 20mph. It is like there is fuel starvation of some sort, or maybe the turbo somehow stops working and I get N/A 2.0 diesel instead!

I have disconnected the battery for a while a couple of times to reset the ECU, and I have checked to make sure that all the connections and pipes are tight. No problems found. No Engine management light or other lights came on at any stage.

Can anyone help me please, as I've gone from having an occasional problem to a nearly undriveable car! Fuel filter should have been changed at last service about 2000miles ago.

Any help much appreciated please.

Daniel

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Hi All.

Another little update - tried disconnecting the Battery for an hour, and this time, I know the ECU was definitey reset as the windows up/downfunction was reset as well, unlike previous occasions.

I took the car out for a drive - it works like a dream as long as you do not rev it past 2000rpm. As soon as you rev it past that, you can hear the turbo stop whining and the car loses power and can barely continue accelerating. No engine lights or anything are coming on.

I've put some injector cleaner into the tank, and after driving it about for approx half an hour, it is slightly better. Also, if I stick it into second, I can manage to rev it up to 3500, but with the loss of power continuing.

Any ideas anyone.....anything appreciated.

Cheers,

Daniel

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Hi All.

Another little update - tried disconnecting the battery for an hour, and this time, I know the ECU was definitey reset as the windows up/downfunction was reset as well, unlike previous occasions.

I took the car out for a drive - it works like a dream as long as you do not rev it past 2000rpm. As soon as you rev it past that, you can hear the turbo stop whining and the car loses power and can barely continue accelerating. No engine lights or anything are coming on.

I've put some injector cleaner into the tank, and after driving it about for approx half an hour, it is slightly better. Also, if I stick it into second, I can manage to rev it up to 3500, but with the loss of power continuing.

Any ideas anyone.....anything appreciated.

Cheers,

Daniel

Daniel

Hello

As vissible you ve cleaned all except turbo -- most probably it is sticked by carbon, as well resulting no reaction on the vacuum criated in suction manifold. Beside please check with vacuum impulse tube that is between turbo actuatoro and manifold - -it might also be blocked by carbon.

Pay attention on suction air filter. Cheers/Igor

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Hi Igor.

Many thanks for your reply. Would make sense actually. Where is the vacuum impulse tube between turbo actuator and manifold please?

Cheers,

Daniel

Daniel

Look at your turbocharger -- between compressor side volute and gas turbine a vacuum actuator is fitted (looks like a small cylinder white metal cloured) and after be focused on the same actuator bottom edge -- there must be a thin tube (abt 4-5 mm dia)that gives an impulse to actuator membrane (the more vacuum/acceleration the more liner force to move a variable vanes)-- this tube takes an impulse from suction manifold. This small ID tube is easy to be blocked by carbon. Cheers/Igor

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