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[tony1980]

i recently bought a 2001 omega 2.2 turbo diesel on 146,ooo miles and when i first test drove it i noticed the engine management light was on and when i drove off there was no power it would take ages just to rev upto 2500 revs , even with foot to the floor it wont rev over 2500 , i did a general check on google and this place game me a few sugestions ie: egr valve & airflow metre , now the egr valve i removed and was really clogged with black crap so i cleaned this off completly and re-fitted but this made no differnce , now the airflow metre is working fine as the engine is worse when un-plugged and when its plugged back in the actuator bar moves so i guess its working as normal
i have checked both major boost pipes and there fine
i took the air filter out and gave a clean just to check for difference
i took diesel filter out and cleaned just to check for a difference
the management light is currently off and wont come on unless i unplug the airflow metre
im just stuck now as what to do

[dieseldean]

if light is out but power still low the first place i'd look is for splits or leaks in intercooler and pipes

[tony1980]

yea already checked both pipes fully and there fine , when you start the car theres no smoke what so ever , and if you hold the revs @ 2000 for about 7 seconds theres a sudden change in tone and the management light comes on and then you let the revs die down and the light gos out
i have had the turbo looked at and its fine

[RichardH]

Next step needs to be getting the code read.  It will give a better indication of the problem.  Do you have a cheap code reader you could use or else know someone that has one?

[tony1980]

hopefully i can get hold of my auto electrition tomorrow as he wasnt answering his phone thurs / fri last week so hopefully he`ll answer tomorrow

[TheBoy]

Boost pressure sensor being blocked is the most common reason for reduced power on those 2.2DTi engines. Though worth putting on a code reader.

[tony1980]

where is the boost pressure sensor located please

[tony1980]

anyone know where the boost pressure switch is located on this please ?

[tony1980]

is the boost control sensor the motor beneith the turbo with 2 small breather pipes going to it and a switch ..

also regarding the EGR valve does anyone know how much pressure the valve should have whilst its being used as when i removed mine and cleaned it , when i push it in and out its not hard to push in but requires a little force but theres plenty of suction

[dpanic88]

Boost pressure sensor being blocked is the most common reason for reduced power on those 2.2DTi engines. Though worth putting on a code reader.

Hi,

I'm also looking for this, cannot find it in the parts guide - so unsure on location. Hope someone will let us know :question

[tony1980]

right just had th etech guy come out with 3 diagnostic machines inc the tech2 and none would read the ecu but once i showed him the problem he says the turbo is over boosting and causing the car to run in safe mode , is this possible as he wasnt 100% sure that was the problem but swears it is def over boosting as when you hold it at 2000 revs the boost pipe is over pressured and he said it shouldnt be like that untill about 5-6000 revs and mazimum boost

any ideas please welcome ?

[TheBoy]

I would say it sound be running approx atmospheric + 1b from around 2 - 2.5k rpm all way to redline.

[tony1980]

all i know is that when you start reving it up you can see the boost pipe expanding rapidly then once you hit 2000 revs the pipe is at maximum expandshire and the theres a sudden dump in pressure and the management light comes on

[Omegatoy]

sticky wastegate???

[tony1980]

i wouldnt of thought so as thats been looked at and seems to be working fine