Focus Hesitiation and Accelerator

[RichardDM]

Hi All and good evening

I have a 2007 Focus 1.8 TDCI.  Over the last couple of months it has developed a Hesitation issue.  It is not all the time and it is hard to explain.  Can be driving a long the road and I might need to push the accelerator maybe to pick up speed to over take a car, when I then coming off the accelerator and changing up a gear as I then engage the accelerator again there will be this hesitation from the car before the rev's pickup, or I might slow down to go around a corner when I have completed the turn and get back on the accelerator it might hesitate before the end rev's pick up.  Also noticed it happens when coming off the motorway and back onto normal roads.  If you have ever drove a petrol car that has had a faulty spark plug and it does bunny hopes then it is a bit like that but not as bad, and it only seems to happen once the engine is warm.  Never seems to happen when the car is parked and the engine is idling.

Have another issue with the accelerator, now this might be an issue or it might just be me.  The position of the accelerator seems to change all the time to what I am asking the engine to do.  Again try and explain, some times can put the foot onto the accelerator pedal like when getting ready to pull away from a stop and the engine does nothing, put the foot down a little bit more and the engine will jump up to 2000 rev's.  Take foot off the accelerator and try again put the pedal to the same position and it will rev up to 1400/1600 rpm.  Also trying to get the engine to rev at 1200/1400/1600 or 1800 rev's seems to be very hit or miss, after about 2000 rpm the pedal position seems to be spot on but anything below that it is just a guessing game all the time.  Turn corners and always have to wait 2-3 seconds once putting the foot onto the accelerator before the engine pickups rpm.

Really getting to the point where I just want to get ride of the car but would like to fix them and keep the car.

[mjt]

Sounds a bit like a TPS problem. You might need to get it checked for fault codes.

[dec1812]

Throttle position sensor is the most probable cause, usually there will be a fault code 

[RichardDM]

Hi All

Thanks for the replies.  Check for fault codes and nothing comes up.  I'll connect the EML327 module I have and record the throttle position to see if anything shows up.

Richard

[James S]

Any idea when your fuel filter was last changed? I had the same problem but really bad and the car would cut out sometimes. Just changed the filter which is a fairly easy and mess free job and it works all good now!

[ajzetecs]

Have you blacked egr off aswell that might help, also few months ago had my alternator changed and after that car was totally different, had a big hesitation with turbo, some places use to drive on daily basis had foot to floor and no power now i have to use throttle pedal carefully because it just takes off, never expected an alternator to make a huge difference, its like its been remmaped again nut better