Constant cutting out of engine.

[mav811]

Hi all, as per norm help/advice needed.
I have a vectra c 1.9cdti 120 2007 210k miles on the clock. It has developed a fault where it keep cutting out normally at low revs(changing gear) of at tickover and then wont restart for a long time or either needs a tow. 1st the AA came out and said high pressure pump was knackered as no pressuere at rail, obviusly not as quick tow and it started and ran fine for a week, then when cutting out was more reugular and after being plugged into another scanner I replaced the fuel pressure regulator (2nd hand part), again ran fine for a few days, now wont run for any period at all. Plugged into scanner again and came up with code P1225 faulty throtle sensor, having read various posts on forum about this today I removed said item and cleaned soot/oil/crap from unit and replaced, fired up 1st time..... and managed half a mile before cutting out again, Now waiting to be scanned again but thought/hoped some-one might have any ideas.
Thanks
Ady

[Critch]

Sounds like fuel starvation.

Try earth the pump signal wire out an see if any improvement

[mav811]

I will certainly try...... any idea of colour of wire or location.

[Critch]

Not a clue will try looking at diagrams

[mav811]

update.... everytime scanned comes up with P1125 or P0400. blocked off egr, and now replaced throttle body with 2nd hand unit, starts, runs till temp gets upto 70oC then cuts out and wont start until cold again......now running out of hair as pulled most of it out.

[Critch]

Crank sensor

[ftm100]

Had same problem was crank sensor

[mav811]

thx for advice, I always thought with the crank sensor would either start or not, dont get a code uo for it.

[mav811]

Just had car running again, once again gets upto about 50-60oC then cuts out and wont restart. When running fuel pressure is about 4k psi at tick over and goes upto 8k when being revd up, after engine has stopped the fuel pressure goes to about 1.5k psi when first cranking then drops to 3-400psi. Any ideas what presure should be at when cranking?

[Critch]

About 200-250 bar cranking