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BigAl
P4
Joined: 06 May 2003
Posts: 2990
Location: U.K Surrey
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 Posted: Thu Apr 30, 2009 3:29 pm Post subject: |
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If you got it, spend it 
Hope this helps
Here is the end of the CTS extension lead that joins onto the loom, its near the injectors.
You can test the output without removing the sensor when engine is cold and when running and hot.
Here is the location of the CTS, i have removed one air bypass tube to the throttle body for a clearer view. I think its a 19mm and you can see that the extension lead touches on the coolent pipe. If you can get that off the CTS should come off without damaging the pipe. You shouldnt have to remove the plenium chamber to do this.
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lee16v
16 Valve
Joined: 29 Jun 2005
Posts: 1429
Location: Devon, UK
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| Posted: Thu Apr 30, 2009 10:26 pm Post subject: |
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| JeremyC wrote: |
| Is it a plenum off job or is it on the outside? |
It's on the inside of the throttle body and it would be easier with the plenum off. Having said that, I did mine with the plenum on and didn't have to much of a problem. |
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JeremyC
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Joined: 06 Sep 2008
Posts: 583
Location: Petersfield, Hampshire
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| Posted: Sat May 02, 2009 6:43 pm Post subject: |
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And the results from the Hampshire jury :
80 - 250
70 - 340
55 - 520
40 - 885
All temperatures from the dash which shows bang on 80 once warmed up, going up to just over when stationary and as the 'stats open at 86 and my car has a new 'stat I'd guess the dash temperature gauge is about right.
Comparing these with Al's figures it would seem that the ECU will be thinking the engine is 10 degrees hotter than it actually is, so, the question is, what will that cause it to do?
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'93 Black 33 1.7 16v |
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BigAl
P4
Joined: 06 May 2003
Posts: 2990
Location: U.K Surrey
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| Posted: Sat May 02, 2009 7:48 pm Post subject: |
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I believe that the idle temp should be 90 degrees. I think alfa made the dials read 80 when it should read 90. I had mine on scantools and it showed engine temp of 90 and the temp gauge showed 80, go figure.
Did you replace yours or test / compair your old one first
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JeremyC
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Joined: 06 Sep 2008
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Location: Petersfield, Hampshire
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| Posted: Thu May 07, 2009 5:18 pm Post subject: |
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No the factors was closed so I tested my existing one, which if your experience is anything to go by is spot on.
No fuel dongle so the state of my lambda sensor is irrelevant so where is my flat spot (2.3 ish to 3) coming from?
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BigAl
P4
Joined: 06 May 2003
Posts: 2990
Location: U.K Surrey
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| Posted: Thu May 07, 2009 6:00 pm Post subject: |
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It could be from you AFM tracks, they can get worn out where they sit most often. Do you have access to another AFM to rule out yours, or you can take off the cover and have a look.
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JeremyC
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Joined: 06 Sep 2008
Posts: 583
Location: Petersfield, Hampshire
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| Posted: Fri May 08, 2009 8:41 am Post subject: |
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That's presumably the square cover between air filter and penum yes?
Any upleasant suprises when I take the cover off? Springs and cogs flying everywhere.
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john 33_16v
16 Valve
Joined: 27 May 2005
Posts: 1406
Location: herts, uk
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| Posted: Fri May 08, 2009 9:11 am Post subject: |
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| JeremyC wrote: |
| No fuel dongle so the state of my lambda sensor is irrelevant so where is my flat spot (2.3 ish to 3) coming from? |
Hi,
My 93 car has no fuel dongle or the plug either like on Big Al's car- we had a look at SAD. However the lambda is definitely NOT irrelevant, and could cause a flatspot.
I'd avoid opening the AFM if poss- nothing will fly out though. You can put electrical conductivety fluid on the tracks which may help. I remember people talking in the past about truly faulty AFMs and they tended to make the car run really badly with massive stammeres tot he point of being undriveable.
I have started my car before with the AFM accidentaly disconnected  and it wouldn't idle properly and was sort of breathless.
Cheers,
John
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BigAl
P4
Joined: 06 May 2003
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Location: U.K Surrey
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| Posted: Fri May 08, 2009 1:15 pm Post subject: |
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Jeremy, you could disconnect the lambda sensor to rule it out, if you have one connected.
Mine runs smoother when not connected, i am lucky though as i can just swap the fuel selecting dongle, i have no idea where they are on later cars, maybe by the ECU?
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