Toyota Avensis Missing

Is the Check Engine Light indicating? If vehicle is equipped wit EGR, that might be the cause because the problem seems to be rpm related.

Hello, there are no dashboard lights showing, I wondered whether it might be the catalytic converter that was causing the problem as it only happens after the car has warmed up and been running for a little while.

If it is the catalytic converter that is clogged, the engine would lose power at higher rpms so I believe it is not the cause.

Hello, I am still experiencing the same problem sometimes to a greater extent. This is the full synopsis so far:-

Power loss when warmed up, starts around 3,400rpm and decreases to as low as 2,500rpm sometimes. The power just cuts and the car will start to kangaroo/miss unless you bring it back down below the threshold. The power loss can be replicated with the car stood still and the accelerator pressed to the threshold point.

It always seems hot in the front of the car when warmed up, noticeably around the centre console, stereo area. Even when the temperature selector is on cold.

There is a little coolant loss, topping up the expansion tank approx. every 5 days.

Items replaced so far :
Plugs
HT Leads
EGR Valve (vacuum advance)

Any further help would be greatly appreciated.

Regards

Robert

Even though the MIL is not indicating, there sould be some trouble code. I would suggest getting a scan done to check first.

Most parts stores provides free scanning services.

If nothing is found, then you would need a scan tool to monitor ther various sensors.

I took it to my local Toyota main dealer to have them check it with their diagnostics and it showed nothing, i did wonder if it might be the MAF or MAP sensors?

Since they had the scan tool on, they should have monitored the various sensors and if anythng was wrong, it should have been noticed.

As no codes are found, you would have to perform mechanical checks. Cheeck if the exhaust system is clogged fr a start.