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ZZT231
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melbourne.vic.au
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May 2002
5M-E Oxy Sensor? Fri, 26 September 2003 09:42 Go to next message
Hey All,

I was just talking to Allan and he came up with the idea of bolting on the Oxygen Sensor into the exhaust and tie it up to the ECU (For Fuel Economy of course).

The question is... Does the Aust. Spec 5M-E ECU support input from the Oxygen Sensor?

Cheers.
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gianttomato
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Re: 5M-E Oxy Sensor? Fri, 26 September 2003 09:44 Go to previous messageGo to next message
No. If you open up the ECU you will see the pin is a dead end.

I suppose you could look for an 86 onwards 5M-E (possibly out of a very late MS123) and check that.

[Updated on: Fri, 26 September 2003 09:51]

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ZZT231
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Re: 5M-E Oxy Sensor? Fri, 26 September 2003 10:16 Go to previous messageGo to next message
Thanks GT,

I knew you would answer soon. I wasn't game in opening up the ECU just to see if it is a dead end Confused .

Cheers.
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ZZT231
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Re: 5M-E Oxy Sensor? Fri, 26 September 2003 10:35 Go to previous messageGo to next message
Yep,

Looking at the EPC, the MS123 has an oxygen sensor (PNC:89465-29075) Very Happy ... Now I have to access whether or not go searching for the ECU and see if it is similar to that of the MA61 ECU plugs Confused

Cheers.
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gianttomato
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Re: 5M-E Oxy Sensor? Fri, 26 September 2003 10:54 Go to previous messageGo to next message
A cautionary note: Remember that what you see on the EPC will depend on what country it comes from. USA, Japan and many parts of Europe had unleaded fuel (and therefore oxygen sensors) many years before we did. Any 5ME ECUs with oxygen sensor inputs will have to come from cars sold from 1986 onwards here in Australia (the year unleaded fuel was made compulsory).
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ZZT231
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Re: 5M-E Oxy Sensor? Fri, 26 September 2003 11:12 Go to previous messageGo to next message
Thanks for the tip GT. I was 1 step ahead of you... Did a search and it did come up for Aust. but don't know if it was installed in the 5M-E...

Have to find one that was made between 09-85 to 09-86 to see if one was fitted with the sensor...

Cheers.
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chrisss
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Re: 5M-E Oxy Sensor? Fri, 26 September 2003 12:38 Go to previous messageGo to next message
the epc indicates that the 5MGE was installed from 9/85 onwards.

no point looking for one unless you want to adapt the entire efi system to the 5m-e with questionable results..
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ZZT231
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Re: 5M-E Oxy Sensor? Fri, 26 September 2003 12:51 Go to previous messageGo to next message
Damn...

Oh well. Looks like I have to live with what I have...

Thanks.
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cambelt
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melb
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Re: 5M-E Oxy Sensor? Fri, 26 September 2003 13:53 Go to previous messageGo to next message
Give it some compression look at the ports lose the , if it has, non lock up auto . and bingo 10 l per hundred
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wilbo666
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Re: 5M-E Oxy Sensor? Sat, 27 September 2003 01:50 Go to previous messageGo to next message
It sucks that they went to all the effort to change the ECU so we don't run an O2 sensor.

After upping the compression and getting a new gear box why doesn't just get a new motor! (2jzge Shocked )

Cheers
Wilbo
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ZZT231
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Re: 5M-E Oxy Sensor? Sat, 27 September 2003 02:29 Go to previous messageGo to next message
wilbo666 wrote on Sat, 27 September 2003 11:50

It sucks that they went to all the effort to change the ECU so we don't run an O2 sensor.

After upping the compression and getting a new gear box why doesn't just get a new motor! (2jzge Shocked )

Cheers
Wilbo


Remember Wilbo, Leaded Petrol and Oxygen Sensors are not best friends Laughing

Cheers.
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wilbo666
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Re: 5M-E Oxy Sensor? Sat, 27 September 2003 06:27 Go to previous messageGo to next message
lol yeah I kinda forget that the 5M-E is meant to take leaded (I just run it on unleaded and it makes no difference to me), cheapo that I am!

Cheers
Wilbo
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V8_MA61
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Re: 5M-E Oxy Sensor? Sun, 28 September 2003 06:41 Go to previous messageGo to next message
i ran mine on unleaded too...if anything the car ran better, and performed better.
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Allan
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Re: 5M-E Oxy Sensor? Sun, 28 September 2003 10:12 Go to previous messageGo to next message
LRP is absolute crap thats why!
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Roseboy
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Re: 5M-E Oxy Sensor? Tue, 14 October 2003 01:12 Go to previous messageGo to next message
Sorry to bring this post up from the dead, but do all 5MGEs have O2 sensors? I have put a 5MGE (no idea of year) in place of the 5ME in my '84 Cressida, but it doesn't have an O2 sensor. Being new to all of this, can someone explain to me if firstly - should it have one? and secondly, where would I look in the engine bay to see if it has just been removed and it did at one stage have one?

My mechanic told me it didn't have one, but no more information than that. Make that my ex-mechanic.

Could this be a cause for my somewhat average fuel consumption on open roads? It seems to really drag along at 100km/h with the fuel indicator showing around 15L/100km.

Thanks a lot guys.

Glen
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Norbie
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Re: 5M-E Oxy Sensor? Tue, 14 October 2003 02:25 Go to previous messageGo to next message
Yes, all 5M-GE's should have an O2 sensor. Look on the exhaust manifold to see if anything has been blocked off; that will tell you if someone has removed it.
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gianttomato
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Re: 5M-E Oxy Sensor? Tue, 14 October 2003 03:23 Go to previous messageGo to next message
Sounds like the 5MGE has gone in where the 5ME used to be....would be interesting to know what ECU is being used.
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Norbie
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Re: 5M-E Oxy Sensor? Tue, 14 October 2003 04:24 Go to previous messageGo to next message
Good point. My old 6M-GE was running off a 5M-E ECU for a while, so it had an O2 sensor but it wasn't connected to anything.
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Cressida Supra
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September 2002
 
Re: 5M-E Oxy Sensor? Tue, 14 October 2003 04:44 Go to previous messageGo to next message
Norbie wrote on Tue, 14 October 2003 10:25

Yes, all 5M-GE's should have an O2 sensor. Look on the exhaust manifold to see if anything has been blocked off; that will tell you if someone has removed it.



nah, the early spec 5mge didnt have o2 sensors
only the late spec ones

the early spec ones had the same ecu and wiring as a 5me, hence, no o2
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justcallmefrank
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Re: 5M-E Oxy Sensor? Tue, 14 October 2003 05:01 Go to previous messageGo to next message
The pin is a dead end, but you can't know for sure if it is...open the ECU up and see if it says Ox for one of the pins. My 1GEU has an O2 sensor, so I'd say the 5MGE did...
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Roseboy
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Adelaide
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Re: 5M-E Oxy Sensor? Wed, 15 October 2003 03:06 Go to previous message
Thanks for all the replies, guys.

Its fairly difficult to get to the ECU (behind the glovebox from memory), but I might give it a go.

We tried to use the existing ECU for the 5ME, however nothing matched up, so we went with a 5MGE ECU. I assume this means that I've got a later model 5MGE? Bear in mind, i bought the ECU and engine at different times, they weren't a matched pair or anything, however everything connected easily.

I can't check the manifold either as all that stuff has been replaced with after-market gear.

Thanks again

Glen
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