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Gallagher99
Gallagher99, Senior Vehicle Technician
Category: Ford
Satisfied Customers: 3232
Experience:  SVQ LEVEL 3, QAULIFIED FORD SENIOR TECHNICIAN , ATA REGISTERD ,12 YEARS EXPERIENCE
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Mondeo 2004 1.8 petrol after car has been driven and come up

Customer Question

mondeo 2004 1.8 petrol after car has been driven and come up to normal running temp when stopping or changing gear the revs shoot right up with foot off the accellerator
Submitted: 2 years ago.
Category: Ford
Expert:  Gallagher99 replied 2 years ago.
Hi there good afternoon to you
Ok does the vehicle idle high when started
If you Rev the engine hard at idle does it take a while for the revs to come down
Regards ***** *****
Brian
Customer: replied 2 years ago.

no

yes

Expert:  Gallagher99 replied 2 years ago.
Hi there thanks
Ok the most common concern and first thing they should be checked Is a split /collapsed L shaped breather hose between the PCV (positive crankcase ventilation ) valve and the inlet manifold
These were probe for splitting and causing infected air to be drawn into the engine thus causing hunting idle and slow return to idle
You can sometimes hear the hissing noise from the lower area of the inlet manifold this is the manifold sucking in the undetected air
To resolve the issue you need to replace this L shaped hose which is located behind the inlet manifold
The inlet manifold needs to be removed to replace this hose
If you require the price /part number of this hose please let me know
If this hose is ok then we may have a possible corrupt throttle postion sensor (bolts to the side of the throttle body )
But this L shaped hose is a very common concern for these symptoms
If you need anymore help or advice on this issue please let me know
If you are Completely satisfied with my answer /advice
PLEASE RATE MY ANSWER
Kind regards ***** ***** and have a nice day
Brian

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