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[osealy]

Don't know if this is any use to you but.

2.5 td's frequently suffer from refusal to start when hot. & eml light coming on after decelerating .problem is temp sensor in hp pump, which apparently can be changed with pump in situ, or ecu can be tricked on fuel temp. I did neither and used car as chicken shed

[sebi1964]

I have the same problem with my 2001 omega 2.2dti(y22dth).
I could not go over 1500rpm, yelow light, a lot of white smoke.
I change filter, clean EGR, check turbo and nothing.
My fault codes P1590  and P1220.
They told me that P1220 is the injection pump, is a mechanical problem.
Suddenly without any intervention my smoke is not so dense, i can accelerate over 1500rpm, Is no longer yellow ligt on, but is some smoke when i push throtle pedal and i am hearing some noise inside the motor.
Mechanics told me that could be injectores, valves, axes or injection pump.
Monday they will disassemble my upper part and check those.
If not i will put it on a trailler and sent it 100km to a service wich repair injection pump.

[Raf]

Sebi1964 you certainly have the same fault codes as me  :-?

so P1220 is the IP? mine didnt log this again and it was probably logged when i was checking the vac lines and elec connections and stuff.... ive never had the codes read on this car or cleared so could be an old one.

what did they tell you what P1590 was?

Osealy; thanks for the reply, im tending to think temp sensor (or something temp related) as i cant figure out why it drives normal when stone cold. However mine starts first time (touch wood) and idles properly.... just doesnt like being driven.

Sebi1964; mine doesnt smoke at all (unless it skips a beat then it just dumps unburnt fuel through), i had smoking probs on a bmw and that was a leaking injector; it was dense white smoke (Stealers wanted to change the turbo, cats & intercooler!!!)... i see yours only does 1500 rpm.... mine does 3000 or on a good day around 3500   how does yours drive when the engine is cold (usually if left overnight)?

[sebi1964]

i check my fault codes again.
P1590 remain but seems that its some high/low voltage error which don't influence the engine.
P1220 is gone but my mechanic said that probably will reappear later when is least expected.
Today we will check the cama axe to find out which causes that noise.
After, if we can solve that problem, i'll go to a center to check my injection pump.

[Raf]

thanks Sebi; keep me posted and if i get any where i'll do the same...

i didnt do anything to the car this weekend; ive checked what i can; had another (ex) mechanic (old school type who is a friend of my fathers) come and have a look, he checked stuff like fuel pump, compression etc, scratched his head and said dunno whats up with it...

so far im thinking (although im no expert);

1) temp sensor or something related to temp.... dont know where this sensor is though.
2) EGR valve; even though it moves im not sure if the vac pressure can move it?
3) the EGR Vac solonoid; dont know why i think it may be this but its cropped up a few times in searching the tinternet...

anymore to the list?

[Raf]

bumpy

[sebi1964]

I found out the cause for that noise in my engine.
A piece below cama axe was broken(i don't know the name for it)
It's possible that the p1220 problem was the cause for this because of unbalanced farce inside the engine.
However p1220 no longer present. When my car will be ready i will try to drive it feww km to see if come back.
P1220 is most likelly a injection pump malfunction.
Anyway the only explanation I have for p1220 dissapeareance is some injection cleaner i used.
So try to see if its not something in your tank and put some magic diesel in yor filter and let it run for 10 min.
If not my opinion is that pump have an mechanical problem.

[Raf]

thanks mate; my P1220 isnt present (or wasnt when they cleared the codes and re-checked)... ive not had the codes re-checked; infact cars in my bro's drive and has been there for a while... im on my push bike at the mo.


do you still have P1590 showing up?

[sebi1964]

P1590 still present but it seems that its not important.
I have changed my broken piece.
Engine run well.
Still after a while yeloww light is on and some smoke appear.
Today I will receck my fault codes.
If P1220 will be find its seems that I have to change the pump.
Sad because its expensive.

[montes1]

OK ... had an Omega come in today,, runnning a bit lumpy but more or less lumpy.. eml light is on.
read code.got code p1590 and more or less , i think it mk or something like that ( sorry i cant remember ur name) he was on the right lines
theres a few checks that u can do, if all checks come out right it is then down to the ecu.
havent got time right now, but will post the work order description....
i hope it helps with ur prob
 

[montes1]

check volt between batt terminals rev upto 3000 rpm at norm running temp
volts should be 13.5-14.5v if yes . to next step


ing off disconect ecu
conect a 55w bulb (headlamp bulb terminals 9 o'clock and 12 o'clock in parallel with multimeter to terminal 39 on wireside of harness and earth should be greater than 11v

next conect lamp and multi to terminal 1 to pos batt volts should be more than 11v same withterminal 2 both should be more than 11v


if all tests are ok then its ecu
if not get back to me
i hope it helps

[sebi1964]

so, after i put some clening additives in my fuel my engine sound a little better, but still some smoke.
I decided to change my pump and i drive 100km to a injection pump specialists.
Surprise, my fault codes changed, no P1220 some other with EGR and ....
They repaired it in half an hour something wrong in my vaccum circuit.
So check your vaccum circuit.
Now working perfect.