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[charlie]

I think there were four ecu types two for u2.5td and two for x2.5dts. one for manuals and one for autos hth 

[Seth]

I think there were four ecu types two for u2.5td and two for x2.5dts. one for manuals and one for autos hth 

That could well be correct Chas ......
All the manual-boxed X25DT's that I've seen have '427' ECUs.
 

[charlie]

THe auto x2.5dt are428 and the u2.5 are 2??

[maracus]

The ECU numbers that you're looking for usually end with '427' or '428'.

Lower 30s MPG is about the norm for a manual-boxed TD running locally - proven!
My previous TD Estate constantly achieved 33 mpg around here.
Performance was disappointing, though once chipped, it positively flew!

well i was beginning to wonder it just seems abit extreme of a difference from the saloon before (37mpg regularly)  but i suppose i will just have to accept this as normal. also, i know there is more weight over the rear wheels but my old one would break traction in the wet in second quite happily,  it would even try in 3rd sometimes, this one wont no matter how savage you are with revs and clutch. Dont know maybe my old one was chipped before i got it. but then why dont my turbo spool up as early on this one? (possibly down to the old one being chipped?) Plus if im not being  gentle-ish with it it'll even droop down to high twenties mpg. think ill do well to get much over 400 miles from this tankfull and i do most of my driving on 60mph roads. So does an estate REALLY use an extra 100 miles worth of fuel per tank?? sure something aint right.

I have checked out the EGR and as far as i can tell, everything is fine there.

[hoofing it]

ok i paperclipped it and all clear. I then done the diesel magic, no change. I have blanked off the EGR, again no change. Nowthen, i went to swap the ECU from the old 'tank' and i noticed the numbers on the label were slightly different and the one i took out said 'TV' and the other said.. something else, cant remember now but about to go look again. I swapped them over and the car refused to start and the light casme on, so i paperclipped the ECU and it came up with; 19, 64, 85, 92. Im now searching for the codes on here (had them the other night, now i cant find them)

 :odid they put a different spec. ECU in estates or something?

19 incorrect rpm signal(crank sensor)
64 fuel qauntity out of range(diesel magic to fix)
85 immobiliser wrong singnal
92 cruise control(if you don't have it ignore this one)
Have you cleaned the swirl pot in the fuel tank yet

[maracus]

no... but i will do next  well i swapped the ECU back for the old one and it started fine no probs. No codes with this one back in, im guessing the immobiliser is in the ECU itself?? hence the code 85. As the codes are now gone i'll ignore what came up on that one and get the swirl pot cleaned- is this just a case of removing the big plastic screw cap and lifting out the pump? think i've seen a how to somewhere on here..

Neither of the numbers on mine end with '427' or '428' on both of mine.
could it be that it somehow has the wrong ECU on it???

[hoofing it]

the ecu is programed to the car imobiliser.
All fault codes are double digits on the t.d.
try this for swirl pot cleaning
 http://www.omegaowners.com/forum/YaBB.pl?num=1251298222

[maracus]

the ecu is programed to the car imobiliser.
All fault codes are double digits on the t.d.
try this for swirl pot cleaning
 http://www.omegaowners.com/forum/YaBB.pl?num=1251298222

:ycheers will get onto that.. looks like i now know why my old one played up with low fuel...

Erm, what should the turbo be boosting to?? :-?

I rigged up the boost gauge off the cavvy earlier to the MAP pipe to see what its doing. It behaves as follows..

My old omega used to take off between about 1750 and 2000 rpm whereas this one is only pushing about 11psi boost at this point. It progressively raises to about 19psi by about the 2250/2300 mark. It holds this until about 3000 rpm where it slowly starts to drop off until about 13/12psi by about 4000 rpm which it holds, pretty much to the limit.

Does this sound like its behaving right?

Also why it so late boosting??

[hoofing it]

the ecu is programed to the car imobiliser.
All fault codes are double digits on the t.d.
try this for swirl pot cleaning
 http://www.omegaowners.com/forum/YaBB.pl?num=1251298222

:ycheers will get onto that.. looks like i now know why my old one played up with low fuel...

Erm, what should the turbo be boosting to?? :-?

I rigged up the boost gauge off the cavvy earlier to the MAP pipe to see what its doing. It behaves as follows..

My old omega used to take off between about 1750 and 2000 rpm whereas this one is only pushing about 11psi boost at this point. It progressively raises to about 19psi by about the 2250/2300 mark. It holds this until about 3000 rpm where it slowly starts to drop off until about 13/12psi by about 4000 rpm which it holds, pretty much to the limit.

Does this sound like its behaving right?

Also why it so late boosting??

I altered my boost valve at the turbo it now kicks in at 1100 rpm
Just remember not to screw the nut up to far only adjust boost valve 1 revolution at a time then take for a run.
If you over do it the engine will self destruct

[maracus]

[/quote]
I altered my boost valve at the turbo it now kicks in at 1100 rpm
Just remember not to screw the nut up to far only adjust boost valve 1 revolution at a time then take for a run.
If you over do it the engine will self destruct[/quote]

sounds scary lol but ill give it a go, just seems odd that its set like this given that TD's are known for low down torque. Plus it strikes me as loosing boost rather early.

[maracus]

ok progress has been hampered  pulled up this evening at home and it sounds like somethings fell apart in the rear wheel area (strange clunking going on) so will investigate tomorrow...

oh well back in the turbo at last...    

[maracus]

Hey peeps sorry to dig up an old post but i thought id give to those that have been following, some closure on the matter (i think...)

I figured my ERG gubbins were all working as they should through different playings about under the bonnet (including rigging up my boost gauge to the EGR pipe to monitor vacuum operation whilst driving) and that everything else sugguested wasn't shedding any light, then looked at the map pipe again...

I found that my MAP pipe was not actually blocked, but had a deteriorated area under the manifold that was starting to fatigue and split  ::)so i changed the pipe.

After a good run and a weekend of use, fuel economy and performance seem better (better mileage on first half tank and a car load of people was killing it last time) so am expecting to get the 500+ miles from a tankful like i used to out the old one. So maybe this was my primary issue???

I'm also going to check my intercooler again just as elimination, because i want to remove it and closely inspect for damage as a lot of crud like a birds nest or something all came out when i pulled the rubber cowling off so just wanna be sure of that before i get it chipped up and start playing with the boost.

anyhows, cheers peeps 

[Omegatoy]

Hey peeps sorry to dig up an old post but i thought id give to those that have been following, some closure on the matter (i think...)

I figured my ERG gubbins were all working as they should through different playings about under the bonnet (including rigging up my boost gauge to the EGR pipe to monitor vacuum operation whilst driving) and that everything else sugguested wasn't shedding any light, then looked at the map pipe again...

I found that my MAP pipe was not actually blocked, but had a deteriorated area under the manifold that was starting to fatigue and split  ::)so i changed the pipe.

After a good run and a weekend of use, fuel economy and performance seem better (better mileage on first half tank and a car load of people was killing it last time) so am expecting to get the 500+ miles from a tankful like i used to out the old one. So maybe this was my primary issue???

I'm also going to check my intercooler again just as elimination, because i want to remove it and closely inspect for damage as a lot of crud like a birds nest or something all came out when i pulled the rubber cowling off so just wanna be sure of that before i get it chipped up and start playing with the boost.

anyhows, cheers peeps 

well done mate!!!

[aaronjb]

Good news indeed!

I fitted an eBay EGR removal kit (listed for the BMW - it's a plain tube replacement for the 'throttle body' type assembly that usually houses the EGR) at the weekend.. no difference, and it turns out my EGR was freely moving, anyway.

Still.. it can't hurt

I best replace the MAP pipe next - I did blow through it, but I didn't actually pull it off from under the manifold (laziness!).. here's hoping replacing that lifts me out of single digit mpg!