FORD FOCUS PROBLEM HESITATION MORE IDEAS ANYONE

[anthony25]

hello all i have a 2000 f0rd focus zetec 1.8 petrol with 82k miles and my problem is a few weeks ago i was driving in my local area come to a roundabout changed to second gear put my foot down and all of a sudden my car lost power managed to get home pop the bonnet and noticed there was a slight misfire so changed plugs leads and the coil pack to no avail so whilst the car was ticking over i took an electrical plug off the injectors one at a time see if one didnt make a difference and number 2 injector wasnt working so swapped it with number 3 started the car the misfire was there then i revved it a nd it went it hasnt misfired at all since then which was two weeks ago but the problem i have now is that sometimes the car hesitates when building up speed more so if i change to 4th gear and try to build up speed fast i get a hesitation and sort of jerk but if i bulid up my speed slowly as possible its fine is this problem connected to the injector problem etc ive also changed the oxygen sensor any ideas..?????

[wilkesneil]

oxygen sensor??

[anthony25]

or also known as lambda sensor...wilkesneil

[wilkesneil]

yes..missed it in there.
are 1 of the injectors blocked???
if 1 is blocked it only sprays fuel through like a jet rather than flowing the fuel through..
just a thought..... if not bang a bit of redex injector cleaner through

[AlBags]

Well I answered this before, and you never replied.
There is an order for checking out problems like this.
So that's that.

[wilkesneil]

my m8 had an oxygen sensor fitted to his mk4 golf and had to have the system reset. have you done this??
what he had to do was disconnect the battery for 20 mins and then start put it back together. this sorted the problem of hesitation in power.
also it could be throttle body/ valves/ seals etc...

[AlBags]

Your mate just dumped the minor fault codes from the ecu. Major ones stayed there.
I expect he did not want to go to the expense of connecting to VW diagnostics and doing it properly.
Once on an ecu baseline, the ecu goes through a learning process. Sometimes this process is stipulated in a manual.