[Alfa33boxer]

Hi again!

This time I need to talk about the lambda sensor in my 33. I need some advice as I think it might need replaced...

I replaced mine about 2 years ago with one manufactured in Germany (bought online).
I also have an Air/Fuel ratio gauge to monitor it, even thou I know it's not very accurate as the wide band ones. Anyway, apart the spectacular light show at night time, you also get some readings. when recently replaced it used to heat up quickly and show readings 5-8 minutes after starting the engine. Now takes a lot more time to show something...
It used to start from lean until reached optimum values, only under hard accelerations could show rich and then back to optimum. (some people say that when just started the engine, it should show rich and than gradually go to optimum, but this never happened even when it was just replaced. It always did the opposite way, started with lean and then to optimum???)
Lately it is showing only lean and I thought it could be my KN air filter that needed clean. Cleaned it but this didn't cure it this time. Also in the highway it's not showing optimum, it just stays to the lean side.
Anyway I'm not experiencing rough idle, misfiring, hesitating, even thou I have noticed an increase of the fuel consumption.

Please can someone tell me how can I verify if it needs replacing again or what?

What do you guys think. If you need to know more about, to get to a conclusion just ask me.

Thanks in advance
Elvis

 

[gazza82]

Not sure about the 33, but the 156 struggles if you fit anything other than a Bosch lambda sensor. The reason is some don't even use the same resistance (4 ohm NTK vs 8 ohm on the Bosch). Poor fuel can also wreck a lambda as we had in the UK a couple of years back when fuel was sold with an impurity. It took a long time for the suppliers to admit that though.

They SHOULD last around 60000 miles, similar to a spark plug, but cheaper ones don't usually. I'd probably buy a proper Bosch universal lambda if I was you. These have to be spliced into the wiring but they supply all the parts and you don't need a soldering iron. You save £40-50 in the UK doing it this way. The Bosch website ought to tell you which one you need but it's probably the standard LS615 four-wire (but please double check)

 

[Alfa33boxer]

Hi again!
I have been checking on the web for the correct lambda sensor for my 33 Imola, and the one that BOSH says that fits my model and they suppose is the one for me, seams is not the right one. It has of course 3 wires as mine but the connection plug is different and actually it has 2 plugs:
1- one wire plug (must be the signal)
2- two wires plug (heating )

BUT mine is a single three wire plug?
Can someone help me on finding the right OXYGEN SENSOR for my 33 '94 1.4ie IMOLA
Best,
Elvis

 

[gazza82]

Can someone let Alfa33boxer and I know the Alfa part number for the Lambda, and then we can look it up on the Bosch parts system again.

 

[brit01]

Maybe this one:

http://cgi.ebay.co.uk/NEW-BOSCH-OXYGEN-LAMBDA-SENSOR-ALFA-ROMEO-33-1.4-91-94_W0QQitemZ180609596768QQcmdZViewItem?rvr_id=235519322420&clk_rvr_id=235509989085&imp_rvr_id=235509989085&clk_rvr_id=235509989085&cguid=3146a4e31300a47a0531cee1fffe362b


NEW BOSCH OXYGEN LAMBDA SENSOR ALFA ROMEO 33 1.4 91-94

Manufacturer: ALFA ROMEO

Model: 33

Sub Model: 1.4ie

Date of Fitment: 09.91-09.94

Chassis Type: [907]

Engine Size (cc): 1.4

Engine Type: AR30755 KAT

Power Output (kW): 64

 

[gazza82]

OK, alfa33boxer, I've checked my copy of eper and it only has one 1.4 IE engine and that shows one lambda with two connectors as on the bosch site ... Alfa part no 60537650. If you type that into the Bosch parts system it will probably come back with same lambda we have already found on there.

I'm now at a loss as to what you need ... PM me your chassis number and I'll check via that, but I think we will come back to the same part.

But could it be possible someone has swapped the connectors and fitted a different sensor? I'd probably leave the connector well alone and get the universal kit listed on Bosch and splice that in. The same sensor is used on a wide range of cars (the one I have on my 156 was for a Vauxhall and cost me a lot less that if it had Alfa written on the side of the package!!). Your sensor is probably similar in that a universal fits a wide range but only the cable length and connector is different. You cut the cables to keep the length the same before fitting it into the wiring block/connector.

 

[GTV-TB]

Maybe this can help, some 33, 145, 146 1.4ie were equipped with titania oxygen sensor
and when it seems that you have a type 51 connector so maybe it is such an lambda
sensor that you have.

Titania oxygen sensor 1700mm
Connector type 51, 3 wire red, white, black

ALFA ROMEO OEM Code : 60576530,605765300
MAGNETTI MARELLI: 460001921010
NGK: OTA5F-3C1 (NGK 1921)

 

[brit01]

GTV is right. I saw this before.

33 1.4i.e.AR307.32 / 3 x wire Titania sensor 02/94 - 10/94 Front OTA5F-3C1

 

[GTV-TB]

Just a note, you must find out if your car are using a zirconia or an titania
oxygen sensor because if you use a zirconia sensor on a titania based system
you will instantly kill your new sensor they are two completely different animals
and is it that you have an titania oxygen sensor so maybe it is the reason why
your Air/Fuel ratio gauge is behaving strangely.

 

[Alfa33boxer]

Well I never thought 33 1.4 ie were fitted with different oxygen sensors. I thought they were the same. This is also because I have owned 3 33, the first was a 1.3 carby with no lambda sensor of course, the next two ones are the Imola version 1.4 ie 1994 with the same type of lambda with the same type of connector...so I thought they were all the same.

Now from what I see online and what I can understand, the lambda sensor with 3 wires and two connectors must be the zirconia type.
From the search I have done it comes out that the type that fits my car, that has the same kind of connector with mine, that fits also some 145/146 1.4ie, must be the titania type.

The connector in my car is original, it hasn't been changed.
Bosh provides the oxygen sensor only for 33 1.4 ie with engine code: AR30755 but my car has this data:

chassis type: 907
engine: 30753
version: 907A3B

so I think the Bosh one doesn't fit to my 33 and is the zirconia type oxygen sensor.

Can someone double check it for me please, if I need the zirconia or the titania one.
Also can someone tell me if my engine is the 88HP or is the 90HP version (I hope I have the 90HP & I'm pretty sure I do)

GTV-TB is right, I have that kind of lambda that has been used also for some 145/146.
And that will be the reason why my new lambda sensor never worked as it should and died so quickly, I never checked if it was a zirconia or titania, I never checked witch was the right one for my car. Last time I just got one from Germany (universal) but I never checked this things, and I paid 60 EUR for the wrong one.:rant:

You guys are so grate, without you I would never know this information.

Please help me find the oxygen sensor I need, as my car feels like a 3.5L engine and and I can't go on like this burning 20 liter of petrol in the city

Thanks again
Elvis

 

[gazza82]

OK eper shows the Alfa Part no as 60576530 for your chassis no, but then it also says you have a AR 30753 1.3 8V engine, not 1.4, although it does confirm it's an Imola!

Bosch isn't listing a part that matches that Alfa number, or lists a lamdba for that engine type, so now I am stuck and confused ...


PS Your PM box is full, so this is what I was going to reply with:

--------------------------------------------------------------------------------------------------------------------------------

OK. eper says ...

You car comes under the "W6 | 33 I.E. 8/16 VALV. (1990-1994)

MVS is an "133.048.3(0) | BN 4X2 1300 I.E.8V IAW USA/83 MEDIA SS."IMOLA" MQ/92"

It was made in May 1993 and the engine version is an M1 | 1.3 8V USA'83

Don't know what most of that means, but it is suggesting you have a 1.3 not a 1.4 ...

Lambda sensor Alfa part no is 60576530, but Bosch doesn't have a match for that, so I can't get a sensor part number. It doesn't even list a lamdba under that engine type, so it could be they don't make one .. but someone else like NTK does?

-----------------------------------------------------------------------------------------------------------------------------

A quick google search on that Alfa part no throws up that it's a Titanium NGK sensor!

http://www.worldcarparts.co.uk/CarParts/tabid/144/ProductID/1220/Default.aspx and that shows a pic with a one piece connector!!

http://www.meat-doria.com/en/product_meat/81514 ... that's possibly a universal you need to splice in ...

According to partspool.com, there could be a real Alfa one in Maidenhead in the UK ... which is probably SGT. But you'd need to contact them to confirm that ... they don't update this list often.

 

[Alfa33boxer]

OK eper shows the Alfa Part no as 60576530 for your chassis no, but then it also says you have a AR 30753 1.3 8V engine, not 1.4, although it does confirm it's an Imola!

Bosch isn't listing a part that matches that Alfa number, or lists a lamdba for that engine type, so now I am stuck and confused ...


PS Your PM box is full, so this is what I was going to reply with:

--------------------------------------------------------------------------------------------------------------------------------

OK. eper says ...

You car comes under the "W6 | 33 I.E. 8/16 VALV. (1990-1994)

MVS is an "133.048.3(0) | BN 4X2 1300 I.E.8V IAW USA/83 MEDIA SS."IMOLA" MQ/92"

It was made in May 1993 and the engine version is an M1 | 1.3 8V USA'83

Don't know what most of that means, but it is suggesting you have a 1.3 not a 1.4 ...

Lambda sensor Alfa part no is 60576530, but Bosch doesn't have a match for that, so I can't get a sensor part number. It doesn't even list a lamdba under that engine type, so it could be they don't make one .. but someone else like NTK does?

-----------------------------------------------------------------------------------------------------------------------------

A quick google search on that Alfa part no throws up that it's a Titanium NGK sensor!

Alfa Romeo 33 145 146 original NGK Lambda Sensor and that shows a pic with a one piece connector!!

3-wire Universal M18 Titania oxygen sensor | Meat and Doria ... that's possibly a universal you need to splice in ...

According to partspool.com, there could be a real Alfa one in Maidenhead in the UK ... which is probably SGT. But you'd need to contact them to confirm that ... they don't update this list often.

thanks for the info mate.
I'm more confused now...why is not a common type of engine, it was made, sold and used in Italy. Alfas
1.3 and 1.4 are basically the same engine, the same block 1351cc, but before they started to fit the injection system the engine was under the 1.3 logo and after they started to fit Weber injection system they put the 1.4 logo on them... I think that is!

How to be sure what type of oxygen sensor I need and what about a universal one, does it do the job properly or it's not worth. The 3 wire titania NTK direct fitment was allot expensive and the best price I got was 100 POUNDS:wow::rant:

Just need to know if I need the titania or zirconia (cheaper)type

 

[gazza82]

Have a look on the NGK site. It only lists two types for the small engine, and the 1994 models seem to need the titanium unit. But not having had a 33, I wouldn't like to suggest that this is 100%.

Using the Alfa part number it suggests the same part http://www.ngkpartfinder.co.uk/cross_reference_search.php?part=60%252057%252065%252030&type=LAMBDA%20SENSORS&manufact=ALFA%20ROMEO


I think it's now a case of you hunting ebay, google, etc to find the best price.

PS I have found that ordering parts from Italy can sometimes be cheapest bet!

 

[GTV-TB]

How to be sure what type of oxygen sensor I need and what about a universal one, does it do the job properly or it's not worth. The 3 wire titania NTK direct fitment was allot expensive and the best price I got was 100 POUNDS:wow::rant:

Just need to know if I need the titania or zirconia (cheaper)type

You can usually distinguish a titania oxygen sensor from a zirconia sensor when the titania sensor usually has one red wire.
The Bosch sensor with two connectors (type 19) mentioned earlier in this thread is an zirconia oxygen sensor.

Some links to OTA5F-3C1 under £ 100 that I found in a quick search.
http://www.ebay.co.uk/itm/NGK-Oxyge...=370391267367&ps=63&clkid=2668764174682056213

http://www.ebay.co.uk/itm/Alfa-Rome...arts_Vehicles_CarParts_SM&hash=item53e45bfe0e

NGK Oxygen Sensor OTA5F-3C1

Just Lambda NTK, Suppliers of NTK lambda sensors by post..

NGK/NTK Lambda Sensor To Fit a Alfa Romeo 33: Amazon.co.uk: Car & Motorbike

SparkPlugsRus : 491 to 500 of 595 items shown for NTK/NGK

Alfa Romeo 33 145 146 original NGK Lambda Sensor

 

[Alfa33boxer]

2 GTV, thanks for the links, very useful and I think I'll go for the NTK from ebay, around 74 Pounds

OK, there are only 2 types of sensors for the small 1.4 boxer, the zirconia one OZA446-E49 is fitted to the 1.4 with engine code AR307.55 from 09/91 –> 12/91 and has a different connector from mine.
the titania one OTA5F-3C1 is fitted to the 1.4 with engine code AR307.32 from 02/94 –> 10/94 and has the same connector as mine,

But I don't see listed my engine code AR307.53 made in 1993???
I guess should be the same as AR307.32 that uses a titania lambda sensor, just need to be sure before I do the order.


Also a last thing to ask, I'm really curios to know witch engine do I have on my Imola, the 88 HP or the 90 HP
Engine Code: AR307.53

You guys are amazing, this is HEAVEN:lol:
Elvis

 

[GTV-TB]

But I don't see listed my engine code AR307.53 made in 1993???
I guess should be the same as AR307.32 that uses a titania lambda sensor, just need to be sure before I do the order.


Also a last thing to ask, I'm really curios to know witch engine do I have on my Imola, the 88 HP or the 90 HP
Engine Code: AR307.53

You guys are amazing, this is HEAVEN:lol:
Elvis

Regarding HP that I could find was on a Russian site and my Russian is not to good but the conclusion I drew was 5 doors 90HP - SportWagon?, 4 doors 88HP - IMOLA?

About the lambda eper comes up with 60576530 (titania oxygen sensor) on your engine number and version 30753 907A3B.

 

[Alfa33boxer]

.

 

[Alfa33boxer]

hello guys!

just ordered the oxygen sensor this morning and I went for the NGK one.
I hope it comes as son as possible as I can't go on like this... My 33 is burning as much petrol as a 2.0L turbo engine:rant::tut:. Is this also part of the Alfa character.
Really guys, I can't talk this days about fuel economy as it doesn't exist for my 33, I do like 30-40 km with 10L in heavy traffic:wow:.
I didn't imagine that lambda sensor could affect so much in the fuel consumption. Strange, I don't see any symptom like misfiring, hesitation, bad idling, nothing like this... It just runs a bit heavy and some valve knock sometimes and a different smell from the pipe and that's it. Apart the fact she's dreaming to be a 2.0L turbo thought...
cheers,:lol::cheese:
Elvis

 

[GTV-TB]

Hrmm, my 2.0L turbo does not burn as much fuel and she do not need to dream of to be.

With such high fuel consumption maybe you also should take and look at the temperature
sensor for the engine management.

ALFA ROMEO : 46449499, 60576529
FIAT : 46449499, 60809565
MARELLI : 215810500200
FACET : 7.3157
QUINTON HAZELL : XEMS77

 

[Alfa33boxer]

Witch one, is it the one in the right head of the car, near the oil pressure sender right?
If it's that one I should check for my spare one from my crashed 33. Can it fail if it's not used for a long time???

cheers,