Omega Owners Forum - V6 MIL light on, caught in log

Peter13

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Posts: 36
Budapest, Hunary
Gender: male

Drives: Omega Estate 3.0 MV6 1998

V6 MIL light on, caught in log
23. Apr 2011 at 21:48

Hello Guys,

I have been concerning since I have got my car that very rarely I get MIL on. This happens usually when I drive uphill
above 2500 rpm rev.
Today I let my wife to drive, and I was sitting on the passengers side with my laptop and op-com connected, waiting for the road section where this happens usually.
As expected after driving up for 15-20 seconds the light was on and had been on for approx 3-5 seconds.

The logfile converted to xls is put here:
http://landboyz.4step.hu/check_engine/

I see in the log from around row 1100, that one of the O2 sensors shows LEAN ratio constantly and the other O2 loop is open for a while just before I get the light on.

Are there any hints what could be the reason of this?
The car is running on LPG, O2 sensors just replaced.

thanks!

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Lazydocker Omega King Offline Victim of Pinky's Power Trip! Posts: 11336 Woodbridge, Suffolk Gender: Drives: 2003 3.2 Elite Estate LPG Converted, inspected and Certified	Re: V6 MIL light on, caught in log Reply #1 - 23. Apr 2011 at 22:28 Without even looking at the file, if it's showing lean running you need to fix that ASAP! Leaning out could be as simple as the LPG needing recalibrating and mapping again
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TheBoy Administrator Offline TBE has an MOT! Posts: 64817 Brackley, Northants Gender: Drives: 98 MV6, 03 Elite, 00 25, 89 ZX10	Re: V6 MIL light on, caught in log Reply #2 - 23. Apr 2011 at 23:16 Does it do the same on petrol?
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Peter13

Newbie

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Posts: 36
Budapest, Hunary
Gender: male

Drives: Omega Estate 3.0 MV6 1998

Re: V6 MIL light on, caught in log
Reply #3 - 24. Apr 2011 at 07:44

I tried several times to switch to petrol when the MIL was on, and it went off.
If I decrease the acceleration a tiny bit, it also switches off.
Honestly, I don't drive on petrol except starting.

I was thinking the same, that the fuel map for the LPG has to be finetuned, but my concern is why only one cylinder row goes lean?

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TheBoy

Administrator

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TBE has an MOT!

Posts: 64817
Brackley, Northants
Gender: male

Drives: 98 MV6, 03 Elite, 00 25, 89 ZX10

Re: V6 MIL light on, caught in log
Reply #4 - 24. Apr 2011 at 09:26

Peter13 wrote on 24. Apr 2011 at 07:44:

I tried several times to switch to petrol when the MIL was on, and it went off.
If I decrease the acceleration a tiny bit, it also switches off.
Honestly, I don't drive on petrol except starting.

I was thinking the same, that the fuel map for the LPG has to be finetuned, but my concern is why only one cylinder row goes lean?

You need to prove that it only happens on LPG, and never happens on petrol. If you mis diagnose that part, you will be chasing your tail forever

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If you are going to kick a car, remember to wear appropriate footwear
Any posts are the result of my own views as a member of OOF, which may or may not be the same as my views as part of the Admin Team.

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Peter13 Newbie Offline Posts: 36 Budapest, Hunary Gender: Drives: Omega Estate 3.0 MV6 1998	Re: V6 MIL light on, caught in log Reply #5 - 30. Apr 2011 at 17:33 You were right. It does the same on petrol! One of the two loops goes to open. The #2 sensor voltage keep between 420 and 500mV. Any ideas?
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