carlw38

as the title says pulled this code from my mondeo duratec engine ( 2l) the car seem to have not much power when driving and you put your foot down it struggle to accelerate and some time looses all power and i have to pull in turn it off the set off again trying not to accelerate hard, Ive checked the map sensor and done a resistance reading on egr also done fuel pressure test, all seem to be fine. Any help would be grate full

phil_focus

i think its your lambda sensor mate, the first one in the system that controls the fueling. second one checks the cat is functioning correctly.

oldford

There are several possibilities.
Could be a defective Oxygen sensor. Could also be an air leak in the exhaust manifold.
Or there's a problem with the fuel pressure. Have you run the fuel tank (almost) empty lately?

carlw38

yes the tank was run nearly empty when the engine was fitted not to long ago, but i carried out a fuel pressure test and that seemed ok

oldford

Could be a clogged filter or even fuel pump.
You should measure fuel flow over a longer time to diagnose this problem.

carlw38

that might be it, as if the tank falls just below 1/4 full the car takes a few attempts to start as start and then cuts out straight away for a couple of goes

ASHCOSSIE

air mass meter pos

carlw38

changed the pump and filter today and car still the same

oldford

Take it to a dealer or independent with the right equipment and read out codes.
Then check sensor signals in live data.

carlw38

got all the right equipment snapon scanner and ford ids code is as title says, will try reading live data and see what i get