High Idle = Low Morale

[VIPERONE]

Well im close to admitting defeat with my idle fault...

On startup the car immediately revs to 2k then climbs to about 3k.

i have tried and clean 4 different iscv
2 speedo cables
2 throttle bodies + pots
inspected all pipes
tried 2 different ecus... stil high revs
car wont stall on blocking the iscv....
manifold gasket is new
spark plugs new dizzy cap new
leads new

recently changed the lambda to a 2nd hand genuine one...was alright tho....

Who has had a high Idle and what has caused it.. help appreciated.

[MatBrown]

CTS.



Mat.

[BigBoreBri]

Have you tried changing the coolant temp sensor or possibly the MAP sensor??

[VIPERONE]

I have changed map sensor also.

coolant sensor hasnt been changed yet,, however i pulled the plug off to no avail.

[BigBoreBri]

Wouldn't a faulty/no reading say the engine's continually "cold" hence more fuel needed... :?

My only other thoughts would be a sticking accelerator cable maybe...

[Lunner]

depends how the variable resistor inside works, might increase the resistance when its cold or increase it when it gets hot.

Gibbo, take resistance readings accross it when its cold, half warm, warm and hot (ie fan cutting in), and the compare to readings off a working car, save getting a new sensor

[Gav]

check ur oxygen control wire...thats what was wrong with mine

[VIPERONE]

its not a low idle fault its high idle.

constant. grrrrrrrrrrr

[BRUN]

do you want a CTS mate ive got 2 spares

[BRUN]

one thing to check is the throttle stop screw on the other side of the throttle body to the TPS, dont mess with it if it hasnt been adjusted, but if it has it might be worth a look

[Coops]

yeah gib mate, if ur blackin the ISCV and its still going u got an air leak else where, check the butterfly in the throttle body is closing fully when the accelerator cable is connected, then stick on ur airbox n block the ISCV that shud stop it. if not, u changed ur inlet manifold recently? cud be an extra vacuum hose connection u've overlooked n air is gettin in through that.

if ur still havin issues drop us a pm with ur addi n i can swing by monday nite n pool resources, see if we cant sort it!!

Coops

[BRUN]

one thing i remembered from stuff you have posted before mate, is your map sensor hose connected to the manifold properly?

[VIPERONE]

CTS changed to no avail :-(

the revs fluctuate around.. wouldnt mind trying another lambda sensor and ignition module

[Tommo]

Gunner, have you tried manually adjusting the idle. Not sure exactly how this is done on the williams due to my limited technical knowledge (on my old 309 GTI it was just a screw on the ICV) but a mechanic I know adjusted mine last week as it was too slow and it's actually too high now about 1400rpm at idle, he's going to slow it down a bit for me tomorrow...

[steveos_16valver]

have you checked if there is any air leaks? possible leak from manifold mine did and reved a gooden couldnet find why until i used leak dector and found a split in the pipe the goes to the manifold ill find a pic

[steveos_16valver]

http://i49.photobucket.com/albums/f255/stevenhes1/sppok.jpg

[steveos_16valver]

make sure the pipe from the map sensors ok not coming off the manifold
try resetting ecu turn ignition on and disconnect battery leave it fou 5 mins and reconnect with ignition off ...worth a try
ill ask @ work tomorrow if i remember 1 of the techs used to work @ renault

[BRUN]

idle is controlled by the ECU on these cars, if he has manually adjusted it then he has used the throttle stop screw, which ideally shouldnt be adjusted ever, trust me, ive done it and messed it up, ended up changing the entire throttle body in the end to fix it

[Martin]

Mine started doing this today! :( was ok after driving for a fe wmins though :?

[Andyvalver]

The time i had bad idle problems with it going up and down and sometimes cutting out and not starting for ages it was an earth.

Try dissconnecting all earths, get some sand paper and sand all the connections so they are shiny and then put thwm back on extra tight. I also took off random connecters and sprayed them with wd-40. I had this problem for a good 2 months but after i did this its been fine since with no probs at all.

Its worth a crack if you dont know what it is, and it dont cost you owt either lol :wink:

I went through alsorts tryin to sort it. plugs leads dizzy/cap coil and so on.

[VIPERONE]

i have several extra earths and have recently sanded them all down lol!

[BigBoreBri]

Well since you replaced just about erm... everything! perhaps its a wiring fault?? Had a 106 Gti hunting like foooook b4 and that was a faulty wire to the MAP sensor... Time to get the gud'ol multi-meter out maybe :wink:

[VIPERONE]

:( :( :( :(

[Purple]

Gunner,

1) Was the idling fine before?
2) Did it go bad by itself with no apparent reason?
3) Were there some events/actions that may have caused the failure? (eg: fiddling around in the engine bay or hitting a pothole or driving through floodwater etc)
4) Has any of the remedies done so far affected the idling in any way? (ie: made it worse, made it better or simply changed its behaviour)

[VIPERONE]

i got 24 hours on the beast 2morrow......if i dont solve it. . . its xr25 time

[BRUN]

you havent said about the map sensor pipe mate

i seem to remember you putting a screw into something ?

[VIPERONE]

The gods have answered my plea.

if you block off the ICV then thats not the problem, what is the problem is a vacuum leak after the throttle plates.

Piossible causes.

Injectors, you have ruled this out though it would seem.
TB - inlet man gasket
throttle plate bypass screw on top of the TB, this should be screwed fully IN.
The brake servo hose
the map sensor hose
charcoal canister hose
inlet man gasket.

the only thing causing the high idle is to much air, the ICV will be fully closed trying to bring the idle down.

to much fuel it will stall, if it pulls back the timing it will stall. only thing is air.

hi ho hi ho 2 find a leak i go

[Purple]

Good to hear that :)

[northy]

any luck?

[VIPERONE]

TB - inlet man gasket check:- negative
IN.
The brake servo hose : checked- negative
the map sensor hose : checked negative
charcoal canister hose : checked negative

inlet man gasket.:

fuel rail off injectors checked
an arse job this.. lol. rad off next to give me access to inlet manifold bolts.
tbc...

[VIPERONE]

http://i4.photobucket.com/albums/y109/gunnergibson/****manifold.jpg


ahhhhh bisto

[Purple]

Did you say you had an airflow meter on the car? Could the sensor installation be affecting the vaccum pressure?

[lewis_willy2]

is that the prob??? gasket??

[steveos_16valver]

have you checked if there is any air leaks? possible leak from manifold mine did and reved a gooden couldnet find why until i used leak dector and found a split in the pipe the goes to the manifold ill find a pic















sorry whos the best
:lol: :lol: :roll: :roll: :wink: :P :D :) :o :lol: :lol:

[Andyvalver]

:lol:

[Scougar]

Cause was leak from manifold in the end? (old thread, but interesting none the less)

Matthew

[VIPERONE]

faulty inlet gasket

[cliokongen]

I had the exact same problem - high revs.
I tried all of the above possibilities.
It turned out the ECU was suddenly faulty of some reason.
Changed it - idles better than ever before.

Michael

[Scougar]

Thanks Gunner :)

Matthew