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Recent LPG Starvation Issue
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Telpat16
Posted 20/8/2013 19:23 (#15515 - in reply to #14894)
Subject: Re: Recent LPG Starvation Issue



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Posts: 108
1005
Location: NEWPORT QLD		Hear hear. I have the slotted socket from changing front one Ordered today. $118.15 Had a look. Think I can do from top with inlet trunk removed from airbox  to TB T

Edited by Telpat16 20/8/2013 23:08
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Telpat16
Posted 21/8/2013 17:36 (#15516 - in reply to #14894)
Subject: Re: Recent LPG Starvation Issue



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Posts: 108
1005
Location: NEWPORT QLD

You said

Administrator - 20/8/2013 18:53 ....take your time and be sure to ditch the old one after cutting the connector off with as long a wire as possible...
 

  

Do you have a use for the old connectors and wire? T



Edited by Telpat16 21/8/2013 17:38
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Telpat16
Posted 22/8/2013 12:32 (#15519 - in reply to #14894)
Subject: Re: Recent LPG Starvation Issue



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Posts: 108
1005
Location: NEWPORT QLD		Done and dusted in about 30 minutes - no problem

Will post new waveform later after I record some more data on a test run





(380_rear oxy.jpg)



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Attachments 380_rear oxy.jpg (259KB - 464 downloads)
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Telpat16
Posted 22/8/2013 15:51 (#15520 - in reply to #14894)
Subject: Re: Recent LPG Starvation Issue



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Posts: 108
1005
Location: NEWPORT QLD		...... and the new wave form is very crisp indeed

And now for a few days use to see if the pesky CEL is banished.....





(380_New_Oxy sensor.jpg)



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Attachments 380_New_Oxy sensor.jpg (101KB - 461 downloads)
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Administrator
Posted 22/8/2013 17:20 (#15522 - in reply to #15516)
Subject: Re: Recent LPG Starvation Issue



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Location: An island off southern Tasmania.
Telpat16 - 21/8/2013 17:36

You said

Administrator - 20/8/2013 18:53 ....take your time and be sure to ditch the old one after cutting the connector off with as long a wire as possible...
 

  

Do you have a use for the old connectors and wire? T




You can use them to make extensions when fitting extractors.


well done on the 30 minutes....am impressed.

thanks also for posting the waveform...it makes it conclusive.
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Telpat16
Posted 22/8/2013 17:32 (#15523 - in reply to #14894)
Subject: Re: Recent LPG Starvation Issue



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Posts: 108
1005
Location: NEWPORT QLD		Thanks

I let it cool for a couple of hours - time for coffee, paper etc before I got started

Not sure I have completely solved - post cat sensor on bank 2 looks a bit lazy also - not sure if a problem or just that the cat is working properly

A few days of driving around will let me know

But definitely NOT an LPG specific problem - I got as CEL yesterday on petrol while I was out of LPG and looking for a servo
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Administrator
Posted 22/8/2013 18:41 (#15524 - in reply to #15523)
Subject: Re: Recent LPG Starvation Issue



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Posts: 1092
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Location: An island off southern Tasmania.
Telpat16 - 22/8/2013 17:32

Thanks

I let it cool for a couple of hours - time for coffee, paper etc before I got started

Not sure I have completely solved - post cat sensor on bank 2 looks a bit lazy also - not sure if a problem or just that the cat is working properly

A few days of driving around will let me know

But definitely NOT an LPG specific problem - I got as CEL yesterday on petrol while I was out of LPG and looking for a servo



The CEL's take a long time to come up if it is marginal Terry, running petrol didn't conclusively prove it in my opinion.
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Telpat16
Posted 22/8/2013 18:50 (#15525 - in reply to #14894)
Subject: Re: Recent LPG Starvation Issue



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Posts: 108
1005
Location: NEWPORT QLD		I had been getting 2 or 3 a day sometimes

Will post a progress report after a week of no CEL - I hope, or change Bank 2 Sensor 2, but a lot harder for me to get to without a pit or hoist or ramps!
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Telpat16
Posted 22/8/2013 21:20 (#15526 - in reply to #14894)
Subject: Re: Recent LPG Starvation Issue



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Posts: 108
1005
Location: NEWPORT QLD		BTW John

Do u have a typical waveform of how the post cat O2 sensors behave

a with good cats

b with bad cats

assuming the primary sensors are working properly?
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Telpat16
Posted 22/8/2013 22:38 (#15527 - in reply to #14894)
Subject: Re: Recent LPG Starvation Issue



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Posts: 108
1005
Location: NEWPORT QLD

Did some more research with the data logs I have and set up new graph of pre and post cat sensor waveforms

Blue = Front Primary sensor

Orange = rear primary sensor

Red = front post cat sensor

Green = rear post cat sensor

Green seems to be flat lining at about 0.2 V

EDIT  Can see some senor activity early in log prior to coolant reaching 80 C  - then flatline

 

Maybe a logging problem or a dead sensor ??

New graph throws some doubt on first wave form I posted - was probably front bank post cat sensor, not rear bank primary

Maybe your extension lead theory will let me re-use old rear primary as rear post cat?? Thoughts ??



Edited by Telpat16 23/8/2013 09:39




(380_Oxy sensor_all.jpg)



Attachments
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Attachments 380_Oxy sensor_all.jpg (122KB - 473 downloads)
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