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Messages - olm

Pages: [1] 2 3 4 5 6 7 8 ... 17
1
Omega General Help / Re: Head gasket?
« on: 22 March 2024, 19:47:45 »
Weren't the 2.5 and 3.0 of certain year prone to failure of the back of the 246 gasket :-\

My 98 MY certainly was. The rear corner of the 246 bank gasket rotted outwards, causing a slight coolant leak on cool down. As previously mentioned, the fire rings were fine. The heat from the engine evaporated the coolant leak, making it difficult to find initially. It left a slight water mark just under the cylinder head rear corner.  :y
It happened to me too! I'm surprised that it broke from the outside in until it attacked the ring, I thought it was a bad purge on the part of the LPG installer, but I see that it is common.

2
Omega General Help / Re: Problems with LTFT on LPG
« on: 22 March 2024, 19:43:35 »
Yes, it has to be when refueling, but I can't imagine what could cause there to be practically no changes in the long-term adjustment no matter how much I add or cut, and also if I demand power the STFT drops drastically when it should go up.
The spark plugs have 20,000 km, so I doubt it could be
I would check the plugs if only to rule them out. Start with the side that's showing the trim discrepancy. Do you have any LPG filters fitted between the evaporator and the injectors? And if so where/how.

Also do you have any live data for the LPG side of things... Injector timings etc.

Yes, there is a filter before the gas phase injectors. I have not touched one and there has been a refueling in which the fuel settings were perfect, now after another refueling they have returned. I thought it could be the station tank, that it came with some problem and renewing it would have solved it, but it seems not. And it is with each refueling that the problem appears or disappears, what can happen with the gas? And the most curious thing, the car seems to run well, although with a little less force if you step hard, although that's just my thing.

3
Omega General Help / Re: Problems with LTFT on LPG
« on: 22 March 2024, 19:38:13 »
Don't rule out injectors getting tired.  Many brands dont last as long as petrol/diesel injectors.

My last Omega, the injectors were worn after about 40k miles, with the symptom being lumpy idle, partucularly when cold, leading to occasional stalling.  In my case, rather than replace injectors, I just had it switching back to petrol under 1200 rpm and not switching back to gas until 1600rpm.  Had I known how long we were going to be keeping it for - the lack of LPG in my area made it unviable, but we kept on being able to get LPG on various journeys - I would have replaced the injectors.

The fact that it sounds like yours is over fuelling when pushed, and under fuelling at light loads, that does sound like mapping isn't right, or that the evap isn't getting the heat at lower loads.


In the UK, our LPG is mostly propane with a small amount of butane IIRC, presumably to stop the propane from freezing when cold.  I'm guessing this mix was always the same, as I never had to remap mine in that latter years based on time of year.

Yes, I thought they were injectors but something curious happened and I haven't responded until I was sure. After a refueling, suddenly the LTFT went to 0, surprised I wanted to wait for another refueling to see what happens.
Unfortunately, the same problem has reappeared after another refueling, always Repsol at the same station.
The strange thing about this is that you only see the problem if you connect the obd because the car works fine, no jerks and no MIL light

4
Omega General Help / Re: Problems with LTFT on LPG
« on: 06 March 2024, 22:30:30 »
Yes, it has to be when refueling, but I can't imagine what could cause there to be practically no changes in the long-term adjustment no matter how much I add or cut, and also if I demand power the STFT drops drastically when it should go up.
The spark plugs have 20,000 km, so I doubt it could be

5
Omega General Help / Re: Problems with LTFT on LPG
« on: 06 March 2024, 19:35:15 »
What's the thermostat doing? Coolant temp at ECU sensor Vs radiator temp Vs evaporator temp...

When did the issue start? ie sudden climatic change or just refuelled or change of use of the car...

The car temperature is fine. The problem came after refueling, I observed an increase in consumption and looked at how the LTFTs were. It is not the first time that it happens, it seems that they change the proportions at will and it is time to tweak, but this time the usual does not work and does not seem to lead to greater contributions or cuts
That suggests a fuel issue then although it sounds like the Italian tune up has made the LPG ECU think about what it's doing.

Perhaps fill the next tank from a different supplier and see if it improves further.

Incidentally does LPG get varied according to season :-\
I don't have another supplier in the area, and in theory Repsol is the best. I've already had several refuelings like this.
The proportions of butane and propane vary depending on the time of year, told myself.

6
Omega General Help / Re: Problems with LTFT on LPG
« on: 06 March 2024, 17:00:39 »
Yes, it is not the first time that this has happened to me after refueling, but with a slight adjustment to the calibration it was perfect. The problem is that now it does not respond and it does not matter if I add a lot or a little or even cut, the LTFT does not change. I can't find an explanation, but as soon as I put it on petrol it goes down quickly and works perfectly.
It happens in both banks equally
Both banks would therefore imply a fuelling restriction (if positive trim), so blocked LPG filter, kinked hose, tank or evap valve not fully opening etc.

A curious thing happened to me today. I was traveling at 90km/h with LTFT close to 25% and when I stepped on it to go up a hill the STFT reduced approximately -20%. Then I tried to give several full throttle pulls and did the same thing, so much so that the LTFTs have gone down. The car responded and accelerated very hard.

7
Omega General Help / Re: Problems with LTFT on LPG
« on: 06 March 2024, 16:57:39 »
What's the thermostat doing? Coolant temp at ECU sensor Vs radiator temp Vs evaporator temp...

When did the issue start? ie sudden climatic change or just refuelled or change of use of the car...

The car temperature is fine. The problem came after refueling, I observed an increase in consumption and looked at how the LTFTs were. It is not the first time that it happens, it seems that they change the proportions at will and it is time to tweak, but this time the usual does not work and does not seem to lead to greater contributions or cuts

8
Omega General Help / Re: Problems with LTFT on LPG
« on: 05 March 2024, 03:20:22 »
Yes, it is not the first time that this has happened to me after refueling, but with a slight adjustment to the calibration it was perfect. The problem is that now it does not respond and it does not matter if I add a lot or a little or even cut, the LTFT does not change. I can't find an explanation, but as soon as I put it on petrol it goes down quickly and works perfectly.
It happens in both banks equally

9
Omega General Help / Problems with LTFT on LPG
« on: 04 March 2024, 01:59:14 »
Hello, I wanted to ask you a question regarding the LPG calibration since the conversion to Omega is quite common there. It turns out that it is quite common for the proportions of butane and propane to change and you regularly have to adjust the LPG times, but this time it is impossible to lower the LTFT, it ranges between 15-20% and it does not matter whether I add or cut it, I notice a change in the engine sound but the LTFT remains the same, when I change to gasoline it drops quickly and everything is Good, so I rule out that it is any sensor in the car, in addition to the fact that the problem coincided after refueling.
Could someone tell me what it could be? Thanks

10
Omega General Help / Re: Trouble with A/C
« on: 23 July 2023, 01:54:51 »
I had the same problem with my project omega last year. Exactly the same. I bought the car with non working ac. Replaced a/c compressor, a/c radiator, all the seals just to find out expansion valve was stuck due to residue/debris from previous ruined compressor.
Final solution was to take omega to ac specialist who washed entire system of debris, replaced compressor again and now the system works fine.
But it did cost me an arm and a leg :-X

Did you have to replace the compressor again?  :-\

11
Omega General Help / Re: Trouble with A/C
« on: 23 July 2023, 01:53:40 »
The clutch can be replaced separately to the compressor.

Sorry, maybe I misunderstood, the compressor works correctly

12
Omega General Help / Re: Trouble with A/C
« on: 19 July 2023, 16:56:48 »
 :(
Does the compressor clutch actually engage? From memory there is a triangular plate on the front of the compressor - this will spin if the clutch is engaged (AC is on). It will be stationary if the clutch is disengaged (AC off). It ain't gonna work unless the clutch is engaged.

The expansion valve is basically a small oriface (hole) where the AC gas expands from a high pressure to a low pressure, getting (much) colder as it does so. The main fault with these is they get blocked if there is any debris in the system. Again from memory, yes its behind the dash on an Omega B.

But check and double check that the compressor clutch is engaging. Any number of things can stop this from happening. You need to make 1000% sure the triangular plate is actually spinning.

Well, unfortunately yes, the pulley turns and makes a noise when you engage the clutch.  :-\

13
Omega General Help / Trouble with A/C
« on: 19 July 2023, 13:49:17 »
Hi, today the a/c compressor was changed because the old one was leaking. When it comes to starting it, surprise, it does not blow cold air. According to the pressures, they told me that it could be the expansion valve.
From what I've seen, this valve goes next to the evaporator, maybe? Because now comes the big problem, I can't remove the dashboard since the radio doesn't come out, I already opened a thread back in the day. Can you confirm that this is so? Or is there another alternative?

Thanks!!

14
General Car Chat / Re: The gap is getting bigger.
« on: 21 October 2022, 02:23:56 »
Thanks Putin and Opec cutting production by 2 million barrels a day .

Paid 2.00 euros today for diesl. ( we get 20 cents off per litre from that price) unleaded was about 1.75.

Not many on the roads

Give thanks to our European leaders and their magnificent "sanctions"
I see that you are from Spain, me too and close to your area. The price of diesel is insane, luckily mine is v6 glp and at Repsol it stays at 0.70, I hope it lasts!

15
Omega General Help / Re: High temperature on highway in summer
« on: 06 July 2022, 20:22:04 »
If you put an pfl auto radiator in,using the in built cooler,will run about 5' cooler,  3.2 runs slightly warmer than 3.0L..

Blow the radiator fins out,from the back forward, if still warm change the thermostat, still runs warm, might be a blockage, check rad gets warm all over.

Well, searching for information I have seen that the extra radiator is for the gearbox oil and that for some reason it also exchanges in the water radiator and then in the extra radiator, is that correct? Because then you couldn't use it to cool any more unless you use it to cool the oil and override the water/oil exchanger. Has anyone installed an oil cooler?

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