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~~~> Emissions Problem NOx Please Help

 
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Just Try It1 Just Try It1
Moderator | Posts: 2796 | Joined: 08/14
Posted: 10/06/18
07:43 PM

with the Lambda /oxygen sensor voltage at 1.00 something is wrong..

Z55gf2y


Cuagde5

slowing the engine down over 20 seconds you should see something like this pattern.. now that you have found a decent pattern of the upstream sensors.. do the downstream sensors.. you should show a reduced waveform pattern.. indicating the cat is reducing emissions.. again this is done at 2500 RPMs with a steady throttle but the down stream test needs to hold the RPMs for a longer time to bring the cat up to operating temps..  

Just Try It1 Just Try It1
Moderator | Posts: 2796 | Joined: 08/14
Posted: 10/06/18
07:44 PM

by the way.. it really helps..

YEAR,  Make, Model, Engine info.. or 8th digit of the Vin number..  

Just Try It1 Just Try It1
Moderator | Posts: 2796 | Joined: 08/14
Posted: 10/07/18
05:40 AM

but your oxygen sensors say 0.0 volts when they should be swinging from 0.09 to 0.9 volts..

something is wrong..

how about some live data stream values with the engine idling warmed up

and another data stream image at 35 MPH steady throttle.. level road..  

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