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 Posted: Tue Jan 15, 2013 10:55 am |
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Joined: Feb 07, 2010
Posts: 2718
Trade Rating: +6
Location: UK
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On a gti it's under the throttle body.
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Posted: Wed Jan 16, 2013 6:03 am |
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Joined: Jan 13, 2013
Posts: 63
Trade Rating: 0
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Just below it yea?
Clean it with the carb cleaner ok?
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Posted: Wed Jan 16, 2013 10:43 am |
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Joined: Jul 22, 2012
Posts: 64
Trade Rating: 0
Location: CAERNARFON
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Whats the alternator output with the engine running
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Posted: Thu Jan 17, 2013 9:16 am |
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Joined: Jan 13, 2013
Posts: 63
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How do you find that out?
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Posted: Thu Jan 17, 2013 9:19 am |
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Joined: Feb 24, 2010
Posts: 2596
Trade Rating: +17
Location: North West Wales
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| 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.
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Posted: Thu Jan 17, 2013 10:56 am |
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Joined: Aug 04, 2011
Posts: 1343
Trade Rating: 0
Location: Swindon
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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.
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| Morris 1000, Austin 1100, Escort Mk2, Fiat Mirafiori, Alfa 33, Alfa GT Junior, Alfasud, Alfetta GTV (2x), Alfa 164 3.0 V6, Alfa 164 2.0, Alfa 75 V6, Alfa 156 2.4 (diesel remapped 200bhp), Alfa 147 GTA (3.6 295bhp), Alfa 159 (diesel remapped 245bhp 300ft.lbs @ 2500rpm)
Why isn't my daughter an Alfaholic? | |
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Posted: Fri Jan 18, 2013 9:01 am |
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Joined: Jan 13, 2013
Posts: 63
Trade Rating: 0
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I can recognise an ICV pal, just never heard it being referred to as a stepper motor before.
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Posted: Fri Jan 18, 2013 12:52 pm |
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Joined: Aug 04, 2011
Posts: 1343
Trade Rating: 0
Location: Swindon
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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.
This will suffice:-
www.maplin.co.uk/domes...eter-37279
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| Morris 1000, Austin 1100, Escort Mk2, Fiat Mirafiori, Alfa 33, Alfa GT Junior, Alfasud, Alfetta GTV (2x), Alfa 164 3.0 V6, Alfa 164 2.0, Alfa 75 V6, Alfa 156 2.4 (diesel remapped 200bhp), Alfa 147 GTA (3.6 295bhp), Alfa 159 (diesel remapped 245bhp 300ft.lbs @ 2500rpm)
Why isn't my daughter an Alfaholic? | |
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Posted: Fri Jan 18, 2013 4:01 pm |
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Joined: Jan 13, 2013
Posts: 63
Trade Rating: 0
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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
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Posted: Fri Jan 18, 2013 4:19 pm |
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Joined: Aug 04, 2011
Posts: 1343
Trade Rating: 0
Location: Swindon
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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.
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| Morris 1000, Austin 1100, Escort Mk2, Fiat Mirafiori, Alfa 33, Alfa GT Junior, Alfasud, Alfetta GTV (2x), Alfa 164 3.0 V6, Alfa 164 2.0, Alfa 75 V6, Alfa 156 2.4 (diesel remapped 200bhp), Alfa 147 GTA (3.6 295bhp), Alfa 159 (diesel remapped 245bhp 300ft.lbs @ 2500rpm)
Why isn't my daughter an Alfaholic? | |
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Posted: Fri Jan 18, 2013 5:11 pm |
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Joined: Jan 13, 2013
Posts: 63
Trade Rating: 0
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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?
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Posted: Fri Jan 18, 2013 5:12 pm |
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Joined: Jan 13, 2013
Posts: 63
Trade Rating: 0
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Also why would I want to check the alternator output?
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Posted: Fri Jan 18, 2013 5:17 pm |
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Joined: Nov 27, 2010
Posts: 11519
Trade Rating: +10
Location: What's it to you? ? ?
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| 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.
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| Toyota C-HR GR Sport 2.0 Hybrid with JBL & Alcantara packs. | |
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Posted: Fri Jan 18, 2013 5:29 pm |
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Joined: Jan 13, 2013
Posts: 63
Trade Rating: 0
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So how would that help me in any way to sort out this problem?
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Posted: Fri Jan 18, 2013 5:48 pm |
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Joined: Aug 04, 2011
Posts: 1343
Trade Rating: 0
Location: Swindon
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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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| Morris 1000, Austin 1100, Escort Mk2, Fiat Mirafiori, Alfa 33, Alfa GT Junior, Alfasud, Alfetta GTV (2x), Alfa 164 3.0 V6, Alfa 164 2.0, Alfa 75 V6, Alfa 156 2.4 (diesel remapped 200bhp), Alfa 147 GTA (3.6 295bhp), Alfa 159 (diesel remapped 245bhp 300ft.lbs @ 2500rpm)
Why isn't my daughter an Alfaholic? | |
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