Idle Speed

[hillbilly 3]

I just took if the idle control valve of my gti6 engine to give it a clean I've got it back on and now it won't tick over or it will just rev it's nuts of. Does anybody know what's happend? Thanks

[cheesegrater 43 1 Cars]

Sealed OK? Throttle plate fully closed?

[Phil205gti6 2 1 Cars]

They are really temperamental, I've been through 3 on mine. Think Bosch or Marrelli are the good ones that rear elf go wrong. Check the seal where it goes into the throttle body and make sure it's pushed in both sides equally when tightening so you don't punch the seal.

[hillbilly 3]

I've just put a new idle control valve on my gti6 and it still revs it's head of. Do you need to set them or something?

[Anthony 1,003]

Try disconnecting the ECU for a couple of minutes to reset it and try again.

[hillbilly 3]

What's the best way to disconnect the ecu?

[Anthony 1,003]

Just unplug it - there's usually enough slack in the loom to do it, although if you've got a strut brace installed it might be more difficult as they tend to sit over the 306 battery box ECU compartment on a 205.

[welshpug 1,657]

leaving the battery off for 15-20 minutes will do it.

[dobboy 231 2 Cars]

http://www.pugaddicts.co.uk/2013/04/how-to-reset-peugeot-306-ecu.html?m=1

[hillbilly 3]

I've just tried all of the above and it's still the same as soon as I start the car it just revs high and won't come down.

[welshpug 1,657]

time to unbolt the ICV and check you didnt forget or damage the o-ring.

[hillbilly 3]

Still the same could it be something else

[dobboy 231 2 Cars]

If you're sure the seal and your refitting of the ICV is ok, you could try temporary blocking off the air supply pipe to the ICV to make sure that it is the ICV that's letting in the air causing hi rev's, and not something else?

 

If it doesn't idle it must be a fault on the control/wiring to it.

 

If it still revs it's head off then air must be getting in somewhere else?

 

I've noticed mines has started hanging at 1500rpm sometimes, so gonna have to have a look at my ICV too.

 

Where did you buy your new ICV?

[hillbilly 3]

I've have just blocked it like you said and it works. I got the icv from my other gti6 and it worked perfect on that car.

[Anthony 1,003]

Check that you've still got 12v to the ICV wiring plug and bell through the wires back to the ECU.

 

Helping someone local to me to diagnose a similar issue on his 205 GTi-6 a few years back we discovered no 12v feed to the ICV and tat did much the same thing as yours, idling at over 3000rpm from memory.

[dobboy 231 2 Cars]

Hillbilly, when you say it worked, what do you mean? It wouldn't idle?

 

From a diagram I have on my phone=

 

ECU pin 40 goes to first pin on IcV

21 goes to second on ICV

20 goes to third

3 goes to forth

 

On the ICV with plug disconnected, you should get a closed circuit between first and second pins

 

Open circuit on third and forth

 

 

First and second pins on ICV should have a bit of resistance as its a little motor.

 

So using the above, you should be able to determine how to read the pins on the plug, ie so you don't read the pins/plug upside down.

 

Pin 3&4 looks to be a normally open micro switch, which I'm guessing tells the ECU when the valve is fully open.

 

And not 100% sure but from memory, if you disconnect the ECU plug and look into the pins, with the shortest row of pins to the bottom, the pins start their numbers on the bottom right #1, middle row very right #19, etc

 

Does any of that make sense?

 

If it does you should be able to check your wiring and the motor part of the ICV, and maybe partially check the micro/limit switch.