On a 1.8 zetec what would cause when coming to a stop and putting the clutch in (or sometimes but very rarely when changing gear) the revs drop as normal but dip right down into the bottom of the rev counter and then the engine will stall?

When sitting there ticking over it isnt a problem no fluctuations (spl) in the revs or anything just the issue with pulling up to a stop mostly??


Mart

 

Try cleaning out the idle air control valve.

if that does nothing try a different vehicle speed sensor.

 

sounds like something to do with the idle...

 

Anyone else in the know?

 

zetecs are terrible for the idle control valves going mate.

i'd jsut replace it.. cleaning dont really do much in my (limited ) experience

 

if it isnt the iscv, could it be egr related??

 

Try a new TPS, this will cause it as just fixed a mondy auto with exact same problem, nothing showed on ford computer!!
tabetha

 

Thanks for the help guys

I'm gonna give it a full service this weekend and try a few of the solutions


Thanks Tabetha will try that first


Mart

 

Usually it's the vehicle speed sensor. Located near the point where the speedo cable joins the gearbox.

 

I would say speed sensor as well from experience

 

On other engines its often the ICV, but on zetecs is common for it to be the VSS im led to believe.

Mine does it too (1.8 mondeo) but not bad enoguh for me to be arsed to fix it, lol

 

Ahhh so the plot thickens lol,

Cheers guys might as well do that too then

 

cause the idle is fine its the spee sensor

 

Cheers Ginge

 

Are you sure it is not lumpy when it idles ?
Try also checking the "T" piece.
tabetha

 

She is a touch lumpy on tick over but never enough to even attempt to stall happily sits there ticking over but does fluctuate (spl) a little but i put that down to wanting a good service (ooer lol)...

So on monday i am getting..
plugs
leads
oil filter
air filter
oil obviously
sump plug
new tps any idea how much?
new speed sensor as above?

I'm going against it being the ISCV as she doesnt behave like the last couple of zetecs i've had with ISCV troubles as in coming to a stop but the revs stay high or during gear change the revs rise dramaticaly..

Mart

 

gaurantee its the iscv had extactly the same problem on my 1.8 si escort..