[Guest]

hello,

i have a 1997 2.0 liter mondeo ghia hb. recently my car needed a maintenance, oil, oil filter, fuel filter, air filter have been changed. there was pinging under hard acceleration. they told me my crank sensor needed to be re-adjusted. anyways, i took the car back, everything was fine, no pinging at all and a huge improvement at the higher rpms. a couple of days later the idle begun to stuck at 1100-1500 rpm all the time and at crusing speed when i press the clutch, instead of dropping to idle rpm the car revvs up on its own to arbitrary revs between 2000 and 5000 rpms. keeps revving for a few seconds and then drops to its non-normal idle at 1100-1500rpm. what could be the reason for this problem?

 

[jarhedch]

sounds like a sticking throttle cable to me, disconnect it at the throttle body and see if it still does it. Also check to see if the throttle body is sticking on its own.

 

[Guest]

i have checked the both throttle cables, there was no sticking at all. considered to clean the throttle body with carb cleaner but decided not to to that when i saw the warning saying "no no no dont clean the throttle body".

i removed fuses 4 and 11 to reset the ecu and waited for 10 minutes, then started the car and drove around for 15 mins. the problem was much less severe but it was still there. maybe it will disappear when ecu fully understands my driving style again

 

[irishghiax]

i had a similar problem with wierd reving from the engine when my foot was not near the accelerator,i replaced the idle speed control valve & that seemed to do the trick,have a look HERE! :L

 

[Guest]

hi,

the problem does not show up when the engine is cold. after 20mins and when the engine reaches normal operating temperature, bam, its there.

that thing is driving me crazy. tomorrow i am going to remove that valve and give it a good soak with philips cleaning spray.

ill post the results

 

[vendee]

The ICV only affects the engine at idle speeds (up to 2000rpm). By all means give it clean as it won't hurt but if you say you are getting over reving to 5000rpm then its more likely to be the throttle position sensor.

 

[ras_undy]

Hi

Did you get this sorted, as I have exactly the same problem, although doesn't rev up to 5000, mine only goes to 3000.

 

[IanJohnston]

Hi all,

My 1997 1.8ltr petrol Mondeo does this.

I notice that if I dip the clutch and hold it dipped whilst moving the revs can go up to 2000 or higher.....and if I coast to a stop (whilst keeping the clutch dipped) then just before I come to a stop the engine will drop to normal idle speed. This is very repeatable.

I also notice that when going up through the gears that as the clutch is dipped you can hear the engine try to race....not alsways, but most of the time.

To me it's as if the ECU is holding revs for gear changes.....but somehow it's gone a bit erratic.

Ian.

 

[steves98mondeo]

could try the ecu reset, remove fuse 4 and 11 near the battery, i always think ford gave dodgy ecu's to mondeo's as it messes up so simply, gonna get a megasquirt ecu, bit technical but it will behave how i tune it. good luck

 

[Dave Ambler]

I had that prob a couple of years ago and it was the ecu.

 

[vendee]

Hi all,

My 1997 1.8ltr petrol Mondeo does this.

I notice that if I dip the clutch and hold it dipped whilst moving the revs can go up to 2000 or higher.....and if I coast to a stop (whilst keeping the clutch dipped) then just before I come to a stop the engine will drop to normal idle speed. This is very repeatable.

This is the way its supposed to work. You are not supposed to dip the clutch while still moving. The VSS (speed sensor) detects that the car is still moving and the EEC anticipates that you are about to change gear. It keeps the revs up to make the gearchange smoother.

I also notice that when going up through the gears that as the clutch is dipped you can hear the engine try to race....not alsways, but most of the time.

It shouldn't do that. That also sounds like the TPS is a bit dodgy.

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