Omega 2.5 td very sluggish low down after manual conversion

[Omega6pot]

Hi, I have just got my omega 2.5td elite manualled and its now very sluggish low down. If you really thrash it the engine eventually picks up but feels asthmatic and unwilling to rev. I plan on remapping it eventually but want this issue cured before doing so. I have had 25 omegas now and the td's normally pull alot stronger than this. Felt quicker with the dreaded AR25 in it. The car has been serviced prior to manualling and is starting on the button, hot or cold.

Any help would be greatly appreciated. I was wondering about the MAF or possibly the little boost solenoid near the power steering resovior?

Cheers Alistair

[TheBoy]

Hmmmmm...  ....wonder if it needs new ECU to make it match the gearbox. What ECU is yours?

[Omega6pot]

Will have a look tommorow, is it just the two letter code that identifies it?  Still running the auto one at the moment

[TheBoy]

Will have a look tommorow, is it just the two letter code that identifies it?  Still running the auto one at the moment

Last 3 digits of it, will be 214, 215, 427 or 428.

[Omega6pot]

cheers i will get it sussed tommorow morning and post up,
Al

[serek]

did car run ok before conversion??
what electric work you done on conversion??
did you clear all code after conversion??

[Omega6pot]

hi, serek, havent cleared codes since conversion, just done the bit of bridging the live feed for starting it. Car ran well on the auto box, it feels very laggy now and gutless

[Sehen]

On automatic's there's a function that retards the ignition, or in the TD's case, the injection timing for a smother gearchange and to go easy on the gearboks at changes. On the petrolversions, there is a wire from the ECU that has to be grounded, or it will run constantly with retarded ignition, hence the low power
On the 2,5TD, it is the brown/white wire from pin 24 on the engine ecu that has to be soldered to a brown wire running to/from the engine ECU (brown is ground)

http://www.omegaowners.com/forum/index.php?topic=90592.0 Like this in the maintainance guide, but as said, brown/white from pin 24 on the engine ECU

Hope this will help

Regards Steve

[Sehen]

Studying the wiring diagram, it look like if you have connected the wire from pin 42 on the TD ECU to the ground, you must reconnect it.
It runs to the memory seats/mirrors. I dont know what it's doing, but probably sensing the car's speed, so that you cannot change the memory setting's when driving.

[Omega6pot]

thanks guys, just heading to a friends garage to have a play with it, had it on a 'private' road and it would barely do 90 mph, i know they are not a fire breathing dragon but its well down on punch from the normal td's

[serek]

hi, serek, havent cleared codes since conversion, just done the bit of bridging the live feed for starting it. Car ran well on the auto box, it feels very laggy now and gutless

what have you done with gear selector socket??, on socket you got pins from A to H
try do other bridge with cable from BCD pins see if thats help

[TheBoy]

wondering why they spcify different engine ECUs for the different gearbox options...  ...be interesting to hear who else has done TD gearbox swaps....

[serek]

wondering why they spcify different engine ECUs for the different gearbox options...  ...be interesting to hear who else has done TD gearbox swaps....

there few people done swap auto to manual on TD motors and dont have any issue
but they
allways do 2 bridges
one for ignition , so car can start
and other for correct gear so engine ECU wont see fault
thats all

[TheBoy]

wondering why they spcify different engine ECUs for the different gearbox options...  ...be interesting to hear who else has done TD gearbox swaps....

there few people done swap auto to manual on TD motors and dont have any issue
but they
allways do 2 bridges
one for ignition , so car can start
and other for correct gear so engine ECU wont see fault
thats all

, thats the news the OP was looking for


Wonder why, though, they did a manual and auto engine ecu 

[serek]

wondering why they spcify different engine ECUs for the different gearbox options...  ...be interesting to hear who else has done TD gearbox swaps....

there few people done swap auto to manual on TD motors and dont have any issue
but they
allways do 2 bridges
one for ignition , so car can start
and other for correct gear so engine ECU wont see fault
thats all

, thats the news the OP was looking for


Wonder why, though, they did a manual and auto engine ecu 

maybe they do 2 different ECU, dont really know 
but if live auto box ecu plug in and select right gear then engine ecu wont know car is manual and will run with out any problems