car starts but will not rev up

Engine Performance problem
2003 Citroen C3 4 cyl Two Wheel Drive Manual 50000 miles

HI I HAVE A C3 WHICH GOES WELL ON THE FLAT OR DOWN HILLS BUT AS SOON AS YOU START TO GO UP A HILL IT SLOWS RIGHT DOWN

start by having the vehicle serviced/tuned

Hello,

Lack of power is a common thing with these cars. I am assuming it is the diesel engine and my first thought is fuel filter.

Here is a guide hat can help you get the problem fixed as well.

https://www.2carpros.com/articles/engine-has-low-power-output

Please let us know what happens.

Cheers, Ken