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BILL
Alfa Sprint
Joined: 04 May 2003
Posts: 154
Location: TRIPOLIS GREECE
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 Posted: Wed May 07, 2003 8:29 pm Post subject: L SENSOR (OR OXYGEN SENSOR) |
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HI IHAVE A ALFA 33 1.4IE CAT WITH MAGNETI MARELI ECU.
I HAVE THE FEELING THAT THE L SENSOR IS NOT WORKING.
WHEN THE ENGINE IS COLD I CANT EASY GET MORE THAN 4000RPM.
IS THERE A EASY WAY TO SEE IF IT WORKS WITHOUT CHECKE THE EMISSIONS?
HAS ANYONE CHANGE IT? MY ALFA HAS MORE THAN 175000KM.
ANY ADVISE WILL BE HELPFULL!!
THANKS!!! |
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Scott Sander
Alfa 33
Joined: 20 Feb 2003
Posts: 419
Location: Sydney, Australia
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| Posted: Wed May 07, 2003 11:33 pm Post subject: |
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Hi,
If you have a multi meter the oxygen sensor should oscillate between 0 and 1V (as a rough guide).
Also if your engine is cold, I would not recommend going above 3000rpm anyway. Let your engine warm up then have fun.
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Scott Sander
'91 Alfa 33 Boxer 16V Monza - Awesome
http://www.sanderfamily.com |
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Gary UK
Alfa Sprint
Joined: 17 Mar 2003
Posts: 218
Location: Darlington UK
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| Posted: Thu May 08, 2003 1:52 pm Post subject: |
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I thought that when cold the engine ran on the 'standard' mapping fixed in the ECU as the engine temp increases it runs the engine by balancing it from the input received from the different sensors.
If this is the case it would tend to indicate that he ECU itself is f-ed.
Does your model of ECU have a 'limp home mode' ie if problems occur then the engine ECU has a setting to get he car to the nearest garage/home but will run very badly ie. below 4000rpm (I have activated this in a Vectra by steam-cleaning the engine bay, an expensive mistake) |
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BILL
Alfa Sprint
Joined: 04 May 2003
Posts: 154
Location: TRIPOLIS GREECE
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| Posted: Fri May 09, 2003 3:38 pm Post subject: |
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WELL, I TESTED WITH A POLYMETER BUT IM CONFIUSED.
THERE ARE THREE CABLES. RED WITH 12V+,WHITE WITH 0,35 TO 0,55V+
AND BLACK WITH 0,10 TO 1,70V+.
WITCHONE IS THE RIGHT ONE ??
ANY HELP WOULD BE HELPFULL.
THANKS IN ADVANCE |
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Scott Sander
Alfa 33
Joined: 20 Feb 2003
Posts: 419
Location: Sydney, Australia
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| Posted: Fri May 09, 2003 3:42 pm Post subject: |
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Measure between the black and white wire. This is the signal from the probe. The 12V is the heater wire.
Also press your caps lock key. It seems to be stuck. 
_________________
Scott Sander
'91 Alfa 33 Boxer 16V Monza - Awesome
http://www.sanderfamily.com |
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BILL
Alfa Sprint
Joined: 04 May 2003
Posts: 154
Location: TRIPOLIS GREECE
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| Posted: Fri May 09, 2003 6:01 pm Post subject: |
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Sorry about the caps.
As for the sensor i ll try it tonight.
Thnx in advance. |
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BILL
Alfa Sprint
Joined: 04 May 2003
Posts: 154
Location: TRIPOLIS GREECE
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| Posted: Sat May 10, 2003 12:20 pm Post subject: |
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It all seems to work A OK. It shows from 0,02 to 0,98.
So i guess its fine but ill check it at a gas analyzer just to be sure.
THNX for all your help. |
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