Zetec surging at constant throttle and reduced power

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rennocneb - 02 Jul 2005 03:37 GMT

Hi i have a 2001 ford focus zx3 with the 2-litre zetec engine. The
engine has a bad surge in it when at constant road speed or when
accellerating. This surge can be made much better by plugging the
vacum line going to the egr. The car has been checked for vacum leaks.
had an exhaust replaced and fuel sendr replaced. I have had it to
several mechanics that are unable to determine the problem. The car
also seems to run rich one mechanic told me the long term fuel trim
was at 18 and the car performs very sluggishly. Any advice would be
very much appreicated.

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anon - 02 Jul 2005 08:08 GMT

can't say off hand i know what the problem is, however i can tell you that i
have heard of this problem before on focus zetecs, i believe its a common
fault that ford are aware of so it might be worth a phone call to your local
(friendly..ha ha) dealer.
regards.

> Hi i have a 2001 ford focus zx3 with the 2-litre zetec engine. The
> engine has a bad surge in it when at constant road speed or when
[quoted text clipped - 5 lines]
> was at 18 and the car performs very sluggishly. Any advice would be
> very much appreicated.

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rennocneb - 02 Jul 2005 19:36 GMT

"" wrote:

> can't say off hand i know what the problem is, however i can
> tell you that i
[quoted text clipped - 29 lines]
> abuse:
> http://www.autoforumz.com/eform.php?p=619363

Well my local dealership is basically ** so im left hunting. I have
been told its a fuel deleviery issue but also that its an egr issue
which i beleive more

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Rob - 03 Jul 2005 06:46 GMT

> "" wrote:
> > can't say off hand i know what the problem is, however i can
[quoted text clipped - 39 lines]
> been told its a fuel deleviery issue but also that its an egr issue
> which i beleive more

ok it could be an egr prob ... but if you unplug the egr and you say its
better ?.... is it gone completely? if not its not the egr.....
first thing i would check is the catalytic convertor... car is rather
new for it to be shot but .... if it is plugged i can do this. you had
fuel sender replaced? how about the fuel filter? air filter? plugs?
start with basics. does it idle perfect? or is idle affected at all ...
did problem get worse gradually? or appear overnight?.

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