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[Christian]

Could anybody tell me if the 2.6 is any diffrent from th e2.5, also is there any reliable diffrences?

Seen a couple of 2.6's but not sure of if there are any known problems with these and performance diffrences in comparison.

Cheers  

[Andy B]

I'm sure you'll get a more detailed answer from the more knowledgable ..... 2.6 has drive-by-wire throttle & no HT leads with coil packs for 1 3 &  5 and 2 4 & 6 instead of the DIS pack on the 2.5, no EGR valve, no secondary air pump gubins. And another 100cc!  

[feeutfo]

for me, 2.6 all day long. Pedal trick gives more accurate engine codes, no egr, no dis pac and leads(coil pac cylinder) drive by wire throttle. More refined sorted motor, will probably be newer/less miles. BUT, they do suffer with a pre cat problem which is of no real consequence other than the dash light on all the time, which may mask a more serious issue. Can be sorted by moving the lambda sensor, post cats, or something like that. Hth

[serek]

2.5 was on pre facelift and FL, 2.6 only FL but u can take better MPG from 2.6

[Christian]

So with this pre Cat pron, what is likely to go wrong if its masking a bigger problem?

2.6's seem to have lesser milage and theres one local ish in gold im very intrested in.

http://search.autotrader.co.uk/es-uk/www/cars/images.action?R=200852325887420&channel=CARS&adcategory=&largeId=840671398

Could do with the experience to buy my first Mig and keep her reliable.


Might ring him up if all is good?

[feeutfo]

looks tidy, couple of things, whats that black blob on the dash between the light switch and wiper stalk in the interior pic. Brake pedal rubber looks brand new. Mine has 70k and is almost showing the metal underneath. No reverseing sensors, may have been an option? And is that a removeable tow bar hiding under the rear bumper?

Cat issue itself is not a real problem. Its the engine management light constantly on thats the issue, annoying, and, if any other engine management problems arise you will not instantly be aware of it as the light will be already on. But regular pedal tricks can leds an eye on it. See here,
http://www.omegaowners.com/forum/YaBB.pl?num=1189022687
You can do the test on the car when you go see it. But bare in mine they could be old error codes stored. Codes translated here,
http://www.obd-codes.com/trouble_codes/
Hth.
Ps check all the dash lights light up when you turn the ignition on. Some times eml issues are hidden buy removing the bulb, in which case the pedal trick wont work anyway as the missing bulb wont flash.

[Christian]

Thanks for the help there , yes now you mension it there are a few bits  like the pedal rubber and the dash blob, it does look clean but would it be best to buy private as the traders all seem to be over priced.

[Entwood]

If you are concerned that the Emissions light problem would mask another problem, then you can buy cheap equipment to turn the light off..

Vary from £30 for the ELM 327 to £80 for the Maxscan .. to a few thousand for a "real" Tech2 !!

I have the 3.2 which has the same problem, but the light has only come on twice in 11 months. A quick check, using the "pedal trick" confirms what the problem is, so I drive home and use the kit to put the light out until the next time.

The reason I have both is simple (like me) .. I bought the ELM 327 initially, it needs a laptop to make it work and is limited in what it does. As I like to know/do more I bought the maxscan, which I find better.

HTH

[feeutfo]

Yes, private if possible, depends what available and how much of a rush you are. Private sellers tend, i always imagine, to want to get rid for fuel tax or repair issues and assume the car's not worth much. Traders know a little better, but regardless, will stick £500 minimum on any costs they incur. Hth

[Martin_1962]

2.6 is fine, except for a bad batch of valve seals which leak

[Amin]

Are the 2.6 in the Omega same with those used in the Vectra GSi?

From what im told the 2.6 in the Vec GSi was "tuned" by MSD, to have slightly higher lift cams and supposedly creates around 190bhp, opposed to the book figure of 170 for the 2.5.

Im not sure if the Omegas use the same engines tho...

[TheBoy]

Are the 2.6 in the Omega same with those used in the Vectra GSi?

From what im told the 2.6 in the Vec GSi was "tuned" by MSD, to have slightly higher lift cams and supposedly creates around 190bhp, opposed to the book figure of 170 for the 2.5.

Im not sure if the Omegas use the same engines tho...

The engine is similar, but there are differences - certainly different intakes on Vectra-C. Omega tuning will be different, partly due to multiram setup (to flatten the torque curve), partly because its heavier.  No special cams in any of the Omegas.

[Amin]

Are the 2.6 in the Omega same with those used in the Vectra GSi?

From what im told the 2.6 in the Vec GSi was "tuned" by MSD, to have slightly higher lift cams and supposedly creates around 190bhp, opposed to the book figure of 170 for the 2.5.

Im not sure if the Omegas use the same engines tho...

The engine is similar, but there are differences - certainly different intakes on Vectra-C. Omega tuning will be different, partly due to multiram setup (to flatten the torque curve), partly because its heavier.  No special cams in any of the Omegas.

Cheers dude, thats helpful  

Maybe im biased, but i think i would go for the 2.5v6, simply because its been around alot longer, so i assume there will be more info about it around the tinternet. Oh and the fact that you can use the 3.0l cams on the 2.5.

Altho you might be able to use the 2.6 MSD cams in the 2.6 Omega engine, however im not sure if you can, infact havent really heard anyone do it!

Best ask on MigWeb.

[Marks DTM Calib]

for me, 2.6 all day long. Pedal trick gives more accurate engine codes, no egr, no dis pac and leads(coil pac cylinder) drive by wire throttle. More refined sorted motor, will probably be newer/less miles. BUT, they do suffer with a pre cat problem which is of no real consequence other than the dash light on all the time, which may mask a more serious issue. Can be sorted by moving the lambda sensor, post cats, or something like that. Hth

Lol, I love these sorts of posts.

The engines(-2.5-26 and 3.0-3.2) are no different (the only major change was on the 3.2 which got a steel crank), slightly more cc on each but, lower compression ratio which was a shame.

The management system did change but, not by much, drive by wire throttle and coil per plug setup (less reliable).

The lower compresson ratio allowed for the removal of the EGR setup and the extra pre-cat supported removal of the air injection.

Given the above, it means there is jack all in it.......and to drive, if both are in good order, you cant tell the difference!

[feeutfo]

for me, 2.6 all day long. Pedal trick gives more accurate engine codes, no egr, no dis pac and leads(coil pac cylinder) drive by wire throttle. More refined sorted motor, will probably be newer/less miles. BUT, they do suffer with a pre cat problem which is of no real consequence other than the dash light on all the time, which may mask a more serious issue. Can be sorted by moving the lambda sensor, post cats, or something like that. Hth

Lol, I love these sorts of posts.

The engines(-2.5-26 and 3.0-3.2) are no different (the only major change was on the 3.2 which got a steel crank), slightly more cc on each but, lower compression ratio which was a shame.

The management system did change but, not by much, drive by wire throttle and coil per plug setup (less reliable).

The lower compresson ratio allowed for the removal of the EGR setup and the extra pre-cat supported removal of the air injection.

Given the above, it means there is jack all in it.......and to drive, if both are in good order, you cant tell the difference!

Oh yes, no secondary air gubbins to go wrong... and the 2.6 will come in a much better looking body shape, with a far better interior. Esp if in elite which wont have those nasty leather pleats in the door cards, ar whole a far better car... For me... :-)