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[dr1978]

Hi everyone I bought a '02 2.2 omega for £400 that has had 2.0 engine put in it, the only problem is when pulling away it has a massive lack of power and it feel like it's lacking power when driving, also the light on the dash with the spanner though the car is on.
Now i think this is all happening because the ecu was not changed at the time and still has the original one in the car, if i change the ecu, key chip, and transponder for a 2.0l one will this solve the problem?
Thanks for your help in advarnce.

[tunnie]

Hummm some other work must have been done here, 2.0 is non DBW (cable operators throttle body) 2.2 is DBW, the throttle body is electronic.

Do you know whats been done to make this work?

Is it the whole 2.0 engine? Or just the head?

[woodoo]

You will have to change all wiring harness on engine, some sensors, throttle body, and fit cable for throttle. It is quite complicated, because you will need more parts then only ECU. Have you read what trouble codes you car gives? Long time ago i fitted 1.8l to 2.0l vectra and there was no problems with it. I suggest read fault codes first.

[Andy H]

Hi everyone I bought a '02 2.2 omega for £400 that has had 2.0 engine put in it, the only problem is when pulling away it has a massive lack of power and it feel like it's lacking power when driving, also the light on the dash with the spanner through the car is on.
Now i think this is all happening because the ecu was not changed at the time and still has the original one in the car, if i change the ecu, key chip, and transponder for a 2.0l one will this solve the problem?
Thanks for your help in advarnce.

The lack of power will almost certainly be a result of the ECU being in 'limp home' mode. Chances are that there is some sensor damaged, missing or incompatible with the ECU.

Changing ECU will be a lot of work with little result. Far better to read the codes and then fix the sensor problem.

Unfortunately you will need either a good code reader or a session on Tech2 to read the codes because the 2.2 doesn't respond to the 'pedal trick'.

The Maxiscan 509 gets good reports on here IIRC http://www.auteltech.com/ms509.htm

[Kevin Wood]

Yep, need to get the engine codes read. If a 2.0 has been fitted with the 2.2 management system intact I can't think why it shouldn't work reasonably well, so need to find out if the ECU is unhappy about something.

[albitz]

The required work to convert from DBW to cables etc must have already been done as th car is driveable,albeit not running properly.
Dont know a lot about the various ECU,s etc. but I would imagine that fitting  the correct ECU for the engine might be a good place to start.Then see if there are other problems to deal with after that.
2.0 ECU,s come up on ebay fairly regularily and are often cheap as chips.

Edit - having just read Kevins post, maybe 2.0/2.2 ECU,s are the same,or similar ? 

[Kevin Wood]

The required work to convert from DBW to cables etc must have already been done as th car is driveable,albeit not running properly.

I'm not so sure. That would be a total nightmare.

Dont know a lot about the various ECU,s etc. but I would imagine that fitting  the correct ECU for the engine might be a good place to start.Then see if there are other problems to deal with after that.
2.0 ECU,s come up on ebay fairly regularily and are often cheap as chips.

There's not a significant difference between the engines that I'm aware of. Doesn't mean it will work. It' s possible the crank / cam sensor wheels are different, for example, but I would be leaving the 2.2 management where it is and finding out why it's not happy. It should run perfectly happily on that, and to convert back from DBW would be a whole world of pain.

[woodoo]

The required work to convert from DBW to cables etc must have already been done as th car is driveable,albeit not running properly.
Dont know a lot about the various ECU,s etc. but I would imagine that fitting  the correct ECU for the engine might be a good place to start.Then see if there are other problems to deal with after that.
2.0 ECU,s come up on ebay fairly regularily and are often cheap as chips.

Edit - having just read Kevins post, maybe 2.0/2.2 ECU,s are the same,or similar ? 

No, ECU are total different, wiring on engine also different, throttle body on 2.0l omega has cable, on 2.2l is electric. I think everything is left from 2.2l on his car except engine block. So first he must read fault codes 

[dr1978]

Ok so I need to get a code reader, do you any of you know a shop where i could buy from rather than ordering online and waiting? also just to let you know the whole engine was replaced.

[TheBoy]

There may be nearby members with suitable readers.

Which ecu is currently in it?

[Andy H]

The required work to convert from DBW to cables etc must have already been done as th car is driveable,albeit not running properly.
Dont know a lot about the various ECU,s etc. but I would imagine that fitting  the correct ECU for the engine might be a good place to start.Then see if there are other problems to deal with after that.
2.0 ECU,s come up on ebay fairly regularily and are often cheap as chips.

Edit - having just read Kevins post, maybe 2.0/2.2 ECU,s are the same,or similar ? 

I think they are very different
- Drive By Wire (not cable)
- Different immobiliser
- Pre and post cat lambda sensors

If I was putting a 2.0 engine into a 2.2 body I would strip the inlet and exhaust manifolds off the 2.0 engine before putting it in the 2.2 body.

I would use the 2.2 DBW throttle, the 2.2 downpipe & cats, the 2.2 cam sensor, 2.2 crank sensor & the 2.2 mass flow meter.
[edit] having read kevins last post... I hadn't considered that the cam & crank trigger wheels might be incompatible [/edit]

[dr1978]

There may be nearby members with suitable readers.

Which ecu is currently in it?

still the 2.2

[woodoo]

Thats how looks ecu from 2.2l
http://www.electis-france.com/documents/images/Products/big/142/main.png
And this one from 2.0l
http://www.actronics.eu/en/25pg/ECU-Siemens-Simtec-56-serie.jpg
 

[TheBoy]

There may be nearby members with suitable readers.

Which ecu is currently in it?

still the 2.2

So someone has refitted the DBW throttles and the coilpack assembly. 2.2 cats etc. So its only the block thats changed?

Any ODBII reader should get the codes out if its the 2.2

[dr1978]

There may be nearby members with suitable readers.

Which ecu is currently in it?

still the 2.2

So someone has refitted the DBW throttles and the coilpack assembly. 2.2 cats etc. So its only the block thats changed?

Any ODBII reader should get the codes out if its the 2.2

Not to sure if it was just the block that was changed he said that the bottom end went on the 2.2 and and got this 2.0 engine to put in it, all done by a garage.
is it possible to just put the 2.2 head on a 2.0 block and get these problems?