151
Omega General Help / re-mapping & tuning
« on: 03 May 2009, 09:39:06 »
Does anyone have any recommendations for a good remapping company that can be trusted to map & tune an Omega 3.2 engine?
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152
Omega General Help / Re: general modifying of 2.5 v6
« on: 27 April 2009, 22:58:15 »
Only 3 pages back. I've just been reading it and then saw your thread. i thought I was seeing things.
As you'll see this subject is "done to death" on all interweb thingies.
http://www.omegaowners.com/forum/YaBB.pl?num=1161986264
As you'll see this subject is "done to death" on all interweb thingies.
http://www.omegaowners.com/forum/YaBB.pl?num=1161986264
153
Omega General Help / Re: Problems with Lucy's diamonds (LSD)
« on: 27 April 2009, 22:15:30 »
If it transpires that there is "play" in the diff. caused by backlash in the gears what are my options?
The diff is working a treat and the grip out of corners is incredible so I don't really want to go back, but at the same time I'd really rather not have the thudding.
The diff is working a treat and the grip out of corners is incredible so I don't really want to go back, but at the same time I'd really rather not have the thudding.
154
Omega General Help / Re: Problems with Lucy's diamonds (LSD)
« on: 26 April 2009, 22:25:08 »Quote
QuoteI don't have any experience with these diffs but clunking when engaging drive sounds to me more like backlash in the gears than a problem with the limited slip section.
I would also be inclined to pop my head under it and check that the flange bolts are tight - just in case.
Kevin
If it is the gears then perhaps it is just me being over critical since the diff was fitted becuse the gearbox hasn't been touched. What could I do to find out / or rectify the gearbox if that is the case?
What / where are the "flange bolts"?
155
Omega General Help / Re: Problems with Lucy's diamonds (LSD)
« on: 26 April 2009, 21:55:29 »Quote
how can you identify an LSD if the id plate is missing? just on the off chance you know?
i cant find the ID plate anywhere on my diff its deffinatly not where mr haynes says
Have a look at this thread; I posted a whole bunch of pictures and information some time back now. Some of it was corrected ny other members' subsequent posts on the thread which I was glad of....
http://www.omegaowners.com/forum/YaBB.pl?num=1223481649/24#24
Another way to check might be to sit on tarmac with the TC off, turn full lock on and boot the accelerator; if you get a lot of wheelspin then yours probably isn't an LSD. (the reason I suggest fulll lock is that the inside rear wheel will get unweighted and start to spin if your harsh enough.)
You could equally try to boot it from stationary in a straight line on a gravel track (again with TC off); if one wheel spins then no LSD, if both do then it probably is.
156
Omega General Help / Re: Problems with Lucy's diamonds (LSD)
« on: 26 April 2009, 21:32:20 »Quote
I don't have any experience with these diffs but clunking when engaging drive sounds to me more like backlash in the gears than a problem with the limited slip section.
I would also be inclined to pop my head under it and check that the flange bolts are tight - just in case.
Kevin
If it is the gears then perhaps it is just me being over critical since the diff was fitted becuse the gearbox hasn't been touched. What could I do to find out / or rectify the gearbox if that is the case?
What / where are the "flange bolts"?
157
Omega General Help / Re: Problems with Lucy's diamonds (LSD)
« on: 26 April 2009, 08:47:39 »Quote
QuoteGenerally caused by oil in the diff with no/knackered friction modifiers.
Or wear in the plates, however first port of cal is change the oil and make sure you fill it with LSD specific!! wont feel the difference straight away but after a few hundred the diff will start to work properly again assuming the plates are ok!!!
I got it from another forum member with the axles removed and the drive shafft ground off leving a stub of 10cm of drive shaft.
That left me reassured that it probably came from a car that was disassembled for reasons othr than a faulty differential.
It sat on its side in a suitcase in my garage for 3 months and a fair amount of oil did drain out.
I've just had it fitted and the oil added is the right oil for LSD. I "hope" that they have added enough oild (1 litre), and not too much.
I'm gathering small hope from the highlighted text above that there is a chance that it settles down over the next few hundred miles or so.
I must admit if you are very delicate with your right foot at low speeds it can be "worked around" i.e. you can avoid the mild thump, but it does thump slightly (and unavoidably) when you 1st engage the car into drive from neutral.
Any comments? Am I on a reasonable tack here with this hope?
158
Omega General Help / Problems with Lucy's diamonds (LSD)
« on: 25 April 2009, 14:07:26 »
I just had the LSD fitted to my car (finally) and it works well, you can really feel the difference on roundabouts and pulling out of side streets etc., but I do have a slight niggle:
When traveling at low speeds (5 - 20mph) which is often the case around town when you lift off the gas to coast into a junction/roundabout and then put the foot back on the gas there is a slight "thump" sound and feel. It feels almostas though the LSD "re-engages" after a very slight delay. It isn't a serious "bang" or anything like that and it all works absolutley fine above 20mph, but I wanted to ask about it to see if anyone had any ideas.
When traveling at low speeds (5 - 20mph) which is often the case around town when you lift off the gas to coast into a junction/roundabout and then put the foot back on the gas there is a slight "thump" sound and feel. It feels almostas though the LSD "re-engages" after a very slight delay. It isn't a serious "bang" or anything like that and it all works absolutley fine above 20mph, but I wanted to ask about it to see if anyone had any ideas.
159
Omega General Help / Re: Help EML Just come on!
« on: 26 April 2009, 22:35:51 »
Buy a brand new "pattern" MAF sensor from eBay. I did about a year ago and have had no trouble since.
£33.50.
There's a whole bunch of information here:
http://www.omegaowners.com/forum/YaBB.pl?num=1223481649/24#24
And here...
http://www.omegaowners.com/forum/YaBB.pl?num=1219699194
Long threads, but worth a read. Your car, being a 2.6, is an OBD2 car like mine, or BBW (Drive By Wire) so will suffer from thr same problems as my 3.2 has in its life.
Weak MAF
Pre-Cats
£33.50.
There's a whole bunch of information here:
http://www.omegaowners.com/forum/YaBB.pl?num=1223481649/24#24
And here...
http://www.omegaowners.com/forum/YaBB.pl?num=1219699194
Long threads, but worth a read. Your car, being a 2.6, is an OBD2 car like mine, or BBW (Drive By Wire) so will suffer from thr same problems as my 3.2 has in its life.
Weak MAF
Pre-Cats
160
Omega General Help / Re: P0420
« on: 16 December 2008, 20:27:22 »Quote
Yes i did see your solution for this but since the car was under warranty it wasnt costing anything but now the warranty has expired i will need to see if i can find a garage that can do your fix for me .... thanks
Some tips:
Be prepared to have replace you lambda sensor. If it has not been out for a long time then the threads can sometimes strip when removing.
Any exhaust place will be able to sell you a lambda sensor "bung" which is a bolt specifically designed to bung / block off the threaded hole where a lambda sensor goes.
Once you have a bung, find / buy a nut that will thread onto it.
Then take the bung and the nut to any decent welder. Ask him to drill a suitably sized hole (10p peice-ish in diameter) in the exhaust just behind the main cat (make sure it isn't so far back that the lambda sensor lead can't reach).
Then he/she can weld the nut you bought over the hole. Hey presto! a new lambda sensor threaded hole.
Then move the sensor back and block off the original hole with the bung.
If you ever find it not to your satisfaction it is simply a case of switching the bung and the sensor around, which is a 5 minute job.
161
Omega General Help / Re: P0420
« on: 16 December 2008, 20:03:43 »Quote
Mmmm second new cat fitted on the 10th and yes the old code has showed up again P0420 in 6 days
As I have tried to tell you before; stop wasting money on garages and new cats and move the secondary O2 sensor to behind the main cat.
162
Omega General Help / Re: P0420
« on: 01 December 2008, 00:48:45 »
I can confirm that the issues I was having after moving the O2 sensors behind the main cat were unrelated (in fact I had a faulty MAF that was causing me a large long term fuel trim error: codes 0170 & 0173).
In answer to your question; moving the O2 sensors back has done the trick and is a sustained solution. I can fully recommend it from direct experience.
I had mine done by adding additional bosses behind the main cat on the stainless cat-back system when it was made, but any friendly and capable garage could drill a hole in the side of your existing middle section and weld you a nut on of the appropriate thread as a new O2 sensor boss.
Plugs for the old (existing) hole are fairly standard fare (even a short bolt that matched the aforementioned nut would do the job). I suspect if you gave long-life a call they'd send you one in the post for very little as I saw boxes of them lying around when I was there.
The O2 sensor cable is plenty long enough to need no modification to reach to behind the main cat. It certainly is on my 3.2 and on the 2.6, so I reckon you'd be safe there.
It is actually a very low investment and simple fix.
Go for it; what have you got to lose?
At worst you put it back again by undoing the O2 sensor and short bolt and swapping them back.
In answer to your question; moving the O2 sensors back has done the trick and is a sustained solution. I can fully recommend it from direct experience.
I had mine done by adding additional bosses behind the main cat on the stainless cat-back system when it was made, but any friendly and capable garage could drill a hole in the side of your existing middle section and weld you a nut on of the appropriate thread as a new O2 sensor boss.
Plugs for the old (existing) hole are fairly standard fare (even a short bolt that matched the aforementioned nut would do the job). I suspect if you gave long-life a call they'd send you one in the post for very little as I saw boxes of them lying around when I was there.
The O2 sensor cable is plenty long enough to need no modification to reach to behind the main cat. It certainly is on my 3.2 and on the 2.6, so I reckon you'd be safe there.
It is actually a very low investment and simple fix.
Go for it; what have you got to lose?
At worst you put it back again by undoing the O2 sensor and short bolt and swapping them back.
163
Omega General Help / Re: P0420
« on: 08 November 2008, 07:00:48 »Quote
The post cat snsors dont do anything for mixture control on this setup and is a proven fix (mainly in europe)
I plan to do the re-postioning on Mick Dundees car when it arrives for its extended stay
Please do not be too sure just yet. I am moving my sensors back to their original position this morning to establish root cause. I'll be clearing tthe codes and will be able to confirm whether my current 0170 & 0173 problem is then replaced by 0420 & 0430 again in the next few days.
If this is the case then what Kevin Wood has found out would appear to be true and I would take the Europeans "proof" with a pinch of salt if I were you.
it would be good if you do go ahead and reposition his sensors from my perspective becasue if he does get the same behavious then I am even more convinced that I am on the right track, if not then I need to look elsewhere. Please keep me posted.
I am building up quite a case of evidence on sorting this 0420 pre-cat isue and I WILL FIX IT, but the movement of the secondary O2 sensors has co-incided perfectly with no further 0420 codes and the start of the 0170 codes so I am not convinced just yet.
Watch this space for details:
http://www.omegaowners.com/forum/YaBB.pl?num=1219699194
164
Omega General Help / Re: P0420
« on: 06 November 2008, 06:27:34 » Very much with you both there.
165
Omega General Help / Re: P0420
« on: 21 October 2008, 20:34:11 »Quote
Does this mean that one of the lambdas is possibly acting up .... or is there something more going on here....
Kevin Woods words
"Another issue which is often grouped with fuel trim, although not necessarily related is the appearance of "cat efficiency" (0420 and 0430) codes on the newer Omegas with 2.2, 2.6 and 3.2 engines. Everything we have discussed above regarding fuel trim relates to the front "pre-cat" Lambda sensors. These engines have a second set of Lambda sensors after a small "pre-cat" in the exhaust elbow.
The only purpose of these "post-cat" Lambda sensors is to determine if the pre-cats are working effectively and to light the emissions light if there is a problem. They are not involved in fuel trim at all - for a very good reason. "
In simple terms your lambda sensors are fine. The 1st (pre) cat is a little tired when cold and the 2nd lambda sensor thinks that the air hasn't been "cleaned" enough in going through that 1st cat.
You can resolve the issue by "tricking" the 2nd lambda sensor and moving behind both cats. The air is then "cleaned" twice by both cats before getting as far as the 2nd sensor and the 2nd lambda sensor is "happy" and you lose the EML warning.