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 Posted: Thu Jan 24, 2013 5:33 pm |
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Joined: Jan 13, 2013
Posts: 63
Trade Rating: 0
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So you definitely would change the ICV. Would that be in any way affected by the AC being turned on/ off though?
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Posted: Fri Jan 25, 2013 8:32 am |
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Joined: Aug 04, 2011
Posts: 1343
Trade Rating: 0
Location: Swindon
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As previously described the AC puts an additional load on the engine so revs will drop lower and stepper motor will try to correct for that.
I could not say 100% that it will be stepper motor but am quite inclined to think so. Will your local scrappy let you try a second hand one and if it fixes it you pay if it doesn't you give it back?
I haven't re-read the whole thread but what checks have you done on MAP sensor or code reading?
Are you sure that the mounting area and hole that the stepper fit into are spotlessly clean.
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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: Sun Jan 27, 2013 6:24 pm |
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Joined: Jan 13, 2013
Posts: 63
Trade Rating: 0
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Before I bought the car I checked the ECU for fault codes and it was all clear! I have cleaned the whole throttle body with the specified carb cleaner. I will have to ask the scrappy but I'm not sure if they will. Might have to just risk it, can't be too expensive from there!
What are the checks you can do regarding the map sensor?
Cheers for the help pal
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Posted: Mon Jan 28, 2013 5:52 am |
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Joined: Aug 04, 2011
Posts: 1343
Trade Rating: 0
Location: Swindon
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I don't think there are many checks you can do of the MAP sensor unless someone here can give output voltages or you can connect the car to PP and get readings from that. It may be worth removing the MAP sensor and spraying with carb cleaner. It is delicate so no scrapping or scrubing please.
When cleaning the throttle body did you remove the ICV (stepper motor) and clean that and the location it fits into. When the ICV is removed also spray carb cleaner into the hole that the ICV mounts into.
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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: Mon Jan 28, 2013 7:03 am |
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Joined: Jan 29, 2011
Posts: 6526
Trade Rating: +10
Location: Westhoughton, Lancashire
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| kandlbarrett wrote: |
| I don't think there are many checks you can do of the MAP sensor unless someone here can give output voltages |
To check the supply voltage disconnect MAP sensor with engine off. Switch on ignition and put a multimeter across terminals 2 and 3.The correct reading should be 5V
To check the operation, leave MAP sensor connected, switch on ignition and put a multimeter across terminals 1 and 2. the reading should be 4.4V
Start engine and leave at idle, check again across terminals 1 and 2. Correct reading is 1.3V
Rev engine in sharp bursts while checking voltage across terminals 1 and 2. It should read 4.4V briefly.
And some people don't think this site has enough technical information. 
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Posted: Mon Jan 28, 2013 8:18 am |
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Joined: Aug 04, 2011
Posts: 1343
Trade Rating: 0
Location: Swindon
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Macca: thank you; that is useful information.
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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: Sun Aug 04, 2013 2:18 pm |
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Joined: Jan 13, 2013
Posts: 63
Trade Rating: 0
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Can you let me know where these 3 terminals are because I am unsure
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