Ford Fiesta 2004 1.4l start issue

Asked by Dec 17, 2015 at 06:39 AM about the 2004 Ford Fiesta

Question type: Maintenance & Repair

Hello

Having an issue with my 04 fiesta 1.4l

Tried to start for work one morning and car will not idle, car will start and
engine will run only if I hold down the accelerator, as soon as I release car
stalls. If engine is revved enough to warm car will run 100% fine, but once
cooled down same issue returns.

No fault codes showing. Instrument cluster has been checked, fuel pump
and sensor checked, spark plugs and ignition leads replaced, had a split in
the crankcase breathing tube which has been replaced.

All signs pointed to throttle body, was cleaned out and still did not work,
then was temporarily replaced with working throttle body from identical car
which still did not sort the problem.

When the engine starts cold the throttle moves to the closed position so I
am coming to the conclusion this could be a throttle sensor issue unless
anyone can suggest anything?

Spoke to ford, they can look Monday but want £94 an hour just to look at it
before any work is done but want to exhaust all options first

3 Answers

19,810

Try cleaning or replacing the ( IAC ) idle air control valve or Mass Air Flow sensor depending on which one your vehicle has.

2 of 2 people found this helpful.
6,675

Firebird is correct that the maf can cause low idle/dies if its dirty and giving a bad enough reading without being out of "specs". Another thing to look at is if the temp sending unit is biased high or low when cold. It can also cause the engine to not want to go through the warm up cycle correctly.

1 of 1 people found this helpful.
155

Definitely check the IAC and associated wireharness.

1 of 1 people found this helpful.

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