October 18, 2011, 5:52 pm
Hi I'm having problems with my 2003 tdci focus on start up its sounds like its misfiring and smoking alot it's warms up and smoke goes but it still judders at low revs intill I floor it I had a snap on diagnostics on it comes up with maf sensor so I changed it and still doing it and still coming up with maf sensor would the map sensor cause it ? And the turbo at idle spools up up abit any ideas ?
October 19, 2011, 2:11 am
After you changed the senser did you reset the ecu by disconnecting the battery
If you didnt try that.
Leave it disconected for at least 30 minutes to allow the ecu to clear itself.
The ecu stores driving habits/fueling levels/errors/calibrations
October 20, 2011, 4:10 pm
Ok I have put a new map sensor and a new maf sensor it still judders and losing power and really smokes in the morning it's been on a snap on diagnostics the codes are clear then I starts to run sweet as a nut then starts juddering and getting smoky as its doing it could it be injectors help me at my ends wits with this car thanks
October 22, 2011, 1:15 pm
try the electronic accelerrator pedal, this is a common thing to fail, can give the same symptoms, can cost bit around £80 to £100 +
October 23, 2011, 1:58 am
it could also be a stuck or gummed up egr valve , these can be removed and cleaned so will not cost anything but for a can of carb cleaner.
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