vito 120 power loss?

[sherco450]

Vito had a power loss this week..
l was towing a caravan 1.5 t on steep terrain for 2 hours..
I am not sure if it is a transmission (over heating gone to limp)
or MAF related ,that l have experience on another Vito.
There was no engine light /code displayed
l restarted and drove fine..

 

[sherco450]

Same thing happened today ... l have a 700km trip planned next week a getting a little worried ..

 

[runningonempty]

2007 vito 120
Hi I've had loads of problems with power loss due to the egr, so i decided to have it deleted from the ecu. engine light has gone but it still runs in limp mod! im wondering if they have done the job correctly.
The egr is still fitted but in the off position and unplugged.
As well as deleting it from the ecu should the egr valve itself be physically removed and blanked off.?