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Frequent flyer Gold
Posts: 1092
   
Location: An island off southern Tasmania. | Jeff,
the sequent 56 is a very stable kit.
I have the test gear kit here.
A 380 does NOT have check engine lights with this kit unless something is wrong.
The car does NOT run with the check light on all the time.
The oxygen sensors are rooted, they need to replace both upstream units.
When driving down an incline no 380 I own does what you describe, we have 3 on LPG.
Tell them you want it fixed perfectly.
talk to paul Nolan at Impco technologies in Melbourne, he will either diagnose it or direct you to someone competent.
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Frequent flyer Gold
Posts: 108
Location: NEWPORT QLD | Hi Jeff
Thanks also for copying this to me as a PM
The 1100/1500 rpm issue seems to me like the toque converter lockup clutch engaging/disengaging m- but as per John not something I am seeing in mine. You may just be fluking the speed/revs at which it custs in or out
I am also having random CEL's over last few months - my OBD scanner reads faults as Lean idle bank 2 or some times a double fault as lean idle both banks then I use it to clear the fault, CEL off
At 90K service dealer said known problem and replaced petrol injector O-rings seals but no improvement
Back to Brian at New Gas to check and tweak the settings (as well as do my annual rego inspection, which dealer can't do because he has no LPG qual mechanic)
I did replace front oxy sensor a few moths ago when it faulted, so may need to do back one also
John
Would that be your next suggestion?
No obvious issue, but no fix to problem either - about twice a week
In relation to overfill it is possible to trick the fill limiter by trickling fuel very slowly - which may have happened if your pump was having a low pressure day
That is part of the valves set up in the rear tank and easy to change - I did mine myself to fix excess flow valve problem as reported at strata of thread - all part of same
Terry |
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Frequent flyer Bronze
Posts: 43
Location: NSW | Thank you Admin and Terry for your prompt response and suggestions.
The CEL was on when the car arrived at Brian's place (has been on since the tank was about 75% full...until it is 25% now). He immediately plugged it into the diagnostics thing, and it returned P2099: Post catalyst Fuel Trim System Too Rich (Bank 2). Brian says it apparently is a very common issue.
Would replacing the O2 sensor(s) fix it? The car has done just over 147,000km...
[Sorry I am very new to this whole LPG thing!]
Kind regards,
Jeff |
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Frequent flyer Gold
Posts: 1092
Location: An island off southern Tasmania. | The 380 oxygen sensors don't last, my son had exactly the same fault in his LPG Vrx.
I had to argue with the dealer, they said same thing, CEL will always come up.
No I said...I have a MUT3, you are wrong, the sensors are faulty.
Bosch website says they have a life of 100k...less if superheated with LPG.
The sensors have to be perfect for LPG to work.
Change the two upper oxygen sensors...or change all 4 if necessary.
I did mine by substitution at home...I knew it would fix it before taking to dealer.
IF...they have the impco test kit like I have they will see the oxygen sensor waveform on the laptop.
It is so obvious when the good sensor show a clean waveform and the fautly shows a jagged one.
I am very confident that it is one or more sensors.
The overfilling can be as simple as the software calibration of the intank sensor gauge.
Do they have the Sequent software kit and dongle? It costs 500 bucks...most of them don't.
Without it you are simply guessing the fault. |
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Frequent flyer Gold
Posts: 108
Location: NEWPORT QLD | New Gas (Brian) has all the kit incl dongle etc. fill limiter is mechanical bit like a toilet cistern. I had mine out to tweak float so I can get 55 l not original 47 Gross tank is 65 so 55 closer to 85% limit |
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Frequent flyer Bronze
Posts: 43
Location: NSW | A big thank you to both of you for continuing to persist with me in this...
Just talked to Brian...he says he has the kit, and said the O2 sensors are "working", if a little "slow"...and that they are "probably" due for replacement.
I asked him how much for those, and he says off the top of his head, about $180 each. He asked for the dealer's number so he can talk to the dealer directly...
He also mentioned something about the "automatic fuel limiter", but the (supplying?) company has gone bust. In any case, he is chasing it up...
Admin: so the fault no longer pops up in your son's VR-X as soon as all four O2 sensors are replaced? It would be nice if the dealer would foot the bill for all 4 (as they should as per warranty), but I guess we will see...
Kind regards,
Jeff |
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Frequent flyer Gold
Posts: 108
Location: NEWPORT QLD | I replaced front sensor in March this year. They now only supply rear sensor, p/n MN 1588A039 identical except slightly longer cable Dealer price is about $110 - much cheaper than I could get Bosch or Repco, which were more than double if I recall correctly I suspect I now need to replace rear one also to cure my intermittent CELs |
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Frequent flyer Gold
Posts: 1092
Location: An island off southern Tasmania. | car uses much less fuel with new sensors
usually if the front one is faulty the other is not far behind.
replace as a pair I reckon....
Jeff...if your car is under warranty then YES it is a warranty item.
As for any LPG parts...contact paul Nolan at Impco in Melbourne...they did one for me just afew months ago (see GTL going to QLD thread)
I cannot praise this kit enough, it delivers superb economy and performance.
oh yes..."slow" oxygen sensors in a 380 are FAULTY oxygen sensors! |
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Frequent flyer Gold
Posts: 108
Location: NEWPORT QLD | I think you are right - is rear one easy to access or lots of stripping? Attached is recorded sensor volts using dash command app and replaying in Scan XL on pc - new one blue, rear pink - seems to cycle at about 1/5 of front one - off to dealer I think!
 (380_Oxy sensor.jpg)
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 380_Oxy sensor.jpg (111KB - 540 downloads)
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Frequent flyer Gold
Posts: 1092
Location: An island off southern Tasmania. | Terry...that is the exact waveform of a faulty sensor.
You can get to the rear one dead easy...on a hoist...maybe ramps....but an oxygen sensor tool is absolutely necessary...about 20 bucks at supacheap auto.
And...unplugging the plug behind the throttle body can be a pain in the butt...
But not worth what they charge to do it.
Do NOT strip the thread...take your time and be sure to ditch the old one after cutting the connector off with as long a wire as possible... |
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Recent LPG Starvation Issue
