#16: Re: Idle concern 206 gti Author: Steve206, Location: UKPosted: Tue Jan 15, 2013 11:55 am ---- On a gti it's under the throttle body.
#17: Re: Idle concern 206 gti Author: Jordy6969, Posted: Wed Jan 16, 2013 7:03 am ---- Just below it yea?
Clean it with the carb cleaner ok?
#18: Re: Idle concern 206 gti Author: LORDPSK, Location: CAERNARFONPosted: Wed Jan 16, 2013 11:43 am ---- Whats the alternator output with the engine running
#19: Re: Idle concern 206 gti Author: Jordy6969, Posted: Thu Jan 17, 2013 10:16 am ---- How do you find that out?
#20: Re: Idle concern 206 gti Author: LeeThr, Location: North West WalesPosted: Thu Jan 17, 2013 10:19 am ----
kandlbarrett wrote:
Sorry, but either way it will be different to a 1.4 8V.
1.4 and 1.6 have the throttle body components in very similar places.
the GTi is a 2.0l EW engine and has the inlet on the front of the engine.
#21: Re: Idle concern 206 gti Author: kandlbarrett, Location: SwindonPosted: Thu Jan 17, 2013 11:56 am ---- I probably missed out the word probably from my statement. I wouldn't want to offer bad advice especially if someone couldn't recognise an ICV (stepper motor) when they saw one.
#22: Re: Idle concern 206 gti Author: Jordy6969, Posted: Fri Jan 18, 2013 10:01 am ---- I can recognise an ICV pal, just never heard it being referred to as a stepper motor before.
#23: Re: Idle concern 206 gti Author: kandlbarrett, Location: SwindonPosted: Fri Jan 18, 2013 1:52 pm ---- Thats odd. It was Sunday when I explained they were the same thing.
Wednesday and you are still asking where it is.
If you can recognise one that's a long time looking for it.
None of my posts have meant to be rude and it is a shame that you seem to have taken it that way.
Alternator output with engine running can be checked by putting a voltmeter across the battery whilst the engine is running. Cheap enough to buy on line or from Maplins.
#24: Re: Idle concern 206 gti Author: Jordy6969, Posted: Fri Jan 18, 2013 5:01 pm ---- I've done it all now pal so I'm not looking for it as I found the first day after I posted this.. and I'm don't think your rude. I've actually been told that a stepper motor and ICV are different things by a lot of people
#25: Re: Idle concern 206 gti Author: kandlbarrett, Location: SwindonPosted: Fri Jan 18, 2013 5:19 pm ---- ICV to be technically correct is actually an IACV = Idle Air Control Valve. It controls air flow only. The steeper motor is part of the ICV. How idle is controlled:-
The steeper motor moves a plunger into different positions to very precisely regulate the amount of air getting to the engine. The MAP and MAF in combination send signals to the ecu of the amount of air flowing and the ecu controls the amount of fuel supplied to match the air.
The clever bit is that the ecu is also monitoring rpm and sending signals to the stepper motor to open or close to keep idle rpm constant.
When you put a load on the engine, in your case switch on AC, the engine needs more air and fuel for the same rpm.
The fact that your rpm rose to 900 with ac on is probably because the plunger was no longer in a position where the dirt (carbon / oil build up) was making the plunger stick.
If there are no fault codes poor idle is usually ICV dirty. The fact that your idle returned when the AC was on reinforced the diagnosis.
#26: Re: Idle concern 206 gti Author: Jordy6969, Posted: Fri Jan 18, 2013 6:11 pm ---- Yea cheers mate! Thing is I've cleaned the whole throttle body, ICV/stepper motor, map sensor and its still doing it. There's no fault codes on the ECU either.
I serviced it this afternoon so we'll see if its still doing it after. Could it be the alternator?
#27: Re: Idle concern 206 gti Author: Jordy6969, Posted: Fri Jan 18, 2013 6:12 pm ---- Also why would I want to check the alternator output?
#28: Re: Idle concern 206 gti Author: MrBSI, Location: What's it to you? ? ?Posted: Fri Jan 18, 2013 6:17 pm ----
Jordy6969 wrote:
Also why would I want to check the alternator output?
Because the engine ecu is smart enough to raise the engine idle speed if needed when the battery voltage is low.
#29: Re: Idle concern 206 gti Author: Jordy6969, Posted: Fri Jan 18, 2013 6:29 pm ---- So how would that help me in any way to sort out this problem?
#30: Re: Idle concern 206 gti Author: kandlbarrett, Location: SwindonPosted: Fri Jan 18, 2013 6:48 pm ---- MrBSI the problem is car almost stalling that is corrected if AC is on ie. load on engine. That makes me think it isn't due to battery voltage low but perhaps worth a check.
I an still inclined to think idle control circuit and stepper motor sticking or defective.
Your knowledge and spotting the fuse board (ops another thread) is amazing and input always welcome. By the way how did you spot that. Surely not just from the Siemens sticker.
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