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sandyt

Well-Known Member

• Sep 23, 2013

• #1

Gents getting .15 to .89 on bank 2 and .02 to .98 on bank A great but everywhere I read that gems should be 5volts ? did any of the gems 1998 have the cheaper o2 sensors or have I got the wrong downpipes and wrong lambda cant see it but you never know

 

MrGorsky

Well-Known Member

Full Member

• Sep 23, 2013

• #2

Standard range is 5v lean and 0v rich.

Mine usually goes from 0.5v to 4.6v or thereabouts. Yours does not sound right to me.

Even if the wrong lambda sensors were fitted, the ECU would still always be thinking the mixture is too rich (no matter what it did to correct it), and would throw an error light eventually...

 

Last edited: Sep 23, 2013

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sandyt

Well-Known Member

• Sep 23, 2013

• #3

The problem is that the sensors were changed in 1998 scrap that yours is the same age.
If it was one then fine but they are both toggling up and down as they should I took some off another p38 1996/7 but they have a different connector. Also noticed that the coolant temp registers at 75c so suspect coolant sensor to ECU is wrong but that would ask for rich not leanwhich 1v would be on one type of sensor but rich on the other confused dot com

 

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sandyt

Well-Known Member

• Sep 23, 2013

• #4

I am wondering if the down pipes are wrong and have the thread for the thor engine lambdas as sure I have read the sensors have a different thread

 

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sandyt

Well-Known Member

• Sep 23, 2013

• #5

No scrap that too as the sensors from the 96/97 fitted but the connectors were different

 

jacckk

Active Member

• Sep 23, 2013

• #6

Are you checking using diagnostics?

My diagnostics shows it in the range of 0-1 but probing the pins directly at the ECU does show the correct 0-5V response.

 

MrGorsky

Well-Known Member

Full Member

• Sep 23, 2013

• #7

What diagnostics are you using?

My Nanocom shows 5 - 1 volt swing on my GEMS engine.

 

jacckk

Active Member

• Sep 23, 2013

• #8

I'm using Lynx.

 

MrGorsky

Well-Known Member

Full Member

• Sep 23, 2013

• #9

Maybe it's a Lynx thing then?

I'd offer to come and compare it Sandy, but the Nanocom I use is my brothers and he's got it up at his house at the moment.

As long as it's swinging from rich to lean it's working properly!

 

Saint.V8

Dyed-in-the-wool 100% RR Junkie

Full Member

• Sep 23, 2013

• #10

Maybe the Lynx readings are decimal readings 0 - 1 : 0=0v and 1=5v

Therefore:

0.15=0.75v
0.89=4.45v
0.02=0.1v
0.98=4.9v

Just maybe!

 

jacckk

Active Member

• Sep 23, 2013

• #11

Saint.V8 said:

Maybe the Lynx readings are decimal readings 0 - 1 : 0=0v and 1=5v

Therefore:

0.15=0.75v
0.89=4.45v
0.02=0.1v
0.98=4.9v

Just maybe!

Click to expand...

Quite possibly!

As far as I can remember it didn't show a unit at the end, so you're probably right.

 

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sandyt

Well-Known Member

• Sep 24, 2013

• #12

Sorry everyone was working doing a dish migration at the Beeb right so yes using lynx diagnostics which happy for others to use and I think that the conclusions are right that it is a scaled value between 0 and 1