can you pipe into the signal wire from the std lambda sensor on the car for an AFR gauge without affecting the readingings being given to the ECU?

 

I should think so, its only reading the signal voltage.

 

i would have thought so as well but i think it's a really low voltage 0v - 1v ? ... the AFR guage would probably have a buffer in it anyway if it was going to affect the reading.

 

Utter crap.
Dont bother, narrow band sensors are useless.

Get a decent wideband setup instead.

 

dont worry chip i'm just borrowing one, and its only so i know when the closed loop stuffs working, not for tuning etc.

 

Hi Jim, Go wideband Don’t waste you money messing about with the standard narrow band, as they are not that accurate, invest in a wideband setup.

Cheers

Steve

 

For checking the closed loop is functioning it will be fine.

In fact it will be better for that than a wideband, as if the lamda sensor is reading wrong for any reason then both the gauge and ecu will see the same wrong values so should still concur.

 

Narrow band sensors with displays are just a bunch of pretty lights

They are completely useless

 

Agreed!!!!

 

Y are they crap. and what is the difference between wide band. narrow band

 

Narrow band sensors are only 'accurate' between about 14.3: 1 and 15.0:1 and most cars with turbos run considerably richer than 14.3:1 on boost, so it would just indicate RICH most of the time, but not tell you HOW rich.

Wide band has a different voltage range and is accurate from about 7.0:1 to around 35.0:1 and will actually provide you with useful information.

 

Thanks would narrow band be ok 4 na engine,

 

No, narrow band is useless

 

Narrow band is pointless for anything other than checking that an ecu tracks around it properly, but as thats what he says (for some weird reason, lol) he wants to do, it will work for that.

 

So it wont accuratley tell me weather or not my carbs are running to rich
or to lean, iwas going to use 2 aftermarket ones wired into 2 autometer
gauges.One for each bank of carbs on a v8. thanks

 

chip... i want to know what the fueling's like (economy wise) etc.

since mine is closed loop it SHOULD always read stoich on cruise...

if it don't... then i need to use less throttle or less revs... tis just an indicator as to if i'm driving too hard or not i s'pose..


anywa, i can borrow this gauge for a while so don't see why i shouldnt bother... lol

 

it will accurately tell you if you are rich or lean, but it won't tell you accurately how rich or lean if you get me.

 

So do i just need to buy a wide band lambda sensor and wire it to theautometer gauges, sorry i am a bit thick.

 

no, that will bugger it up immediately.

wb sensors need a controller and stuff. do a search on here or google for wide band stuff. there's plenty of info out there. techedge for example.

 

Thanks

 

ive got a techedge one, nice bit of kit.

 

I to use techedge wideband,


Cheers

Steve

 

Thats the same display ive got in my nova, ace little bit of kit