update on problem

**Mike1975** · 17th October 2012, 18:06

hi all been having a few probs with my cdti 150 55 plate
no power under 2k poor fuel econmy and a bad judder around 1300rpm and when pulling hard at 1300 rpm posted theses pics and was advised to get live readings

things done to car so far
cleaned stripped and blanked egr
cleaned and stripped bcs
new bcs vacume pipes
cleaned and stripped throttle body circuit board ok
changed 3rd and 4th injector wiring
full service
new thermostat
new alternator and bat
cleaned boost sensor
swirl bar all ok

any advice/help would be greatly appriciated has it really doing my head in now thanks all

**BigWilko** · 17th October 2012, 18:21

I'm no expert but i'm guessing something to do with cylinder 2?

**Richard.roberts** · 17th October 2012, 20:13

From what ive read mike is that -deviation compensates for +deviation ,so one cylinder will be more into -deviation to compensate for another cylinder which is more into + deviation, also theres alot of mention of doing a diesel purge to give the injectors a good clean, which is a cheaper first option rather than recon/renew, you can get a can of liqui moly diesel purge on ebay for around a tenner, you could try just filling the fuel filter housing with it rather than linking a load of pipes up, just an idea mate

**jamesmcuk** · 17th October 2012, 21:39

Clean the contacts on the wiring plugs to injector 2 (does is smoke much under acceleration?) Also could be a bad injector. Guess you could try swapping them round but I never done this on a Vec so don't know if there is any bad points about doing so!

**Mike1975** · 18th October 2012, 12:35

No there's no smoke and I just put a treatment if forte through it still the same though

**Mike1975** · 18th October 2012, 19:48

Can't anyone tell me if these injectors reading are I know I got a seal gone on 3 but don't want to change that then find out the injectors need doing to anyone help

**C-Owner** · 18th October 2012, 20:00

Originally Posted by Mike1975

Can't anyone tell me if these injectors reading are I know I got a seal gone on 3 but don't want to change that then find out the injectors need doing to anyone help

The injectors can be within +/- 1.3 mg/stroke

The video clip below shows a 1.9 CDTI 150 running ok, although the up-loader of the video didn't know what he was looking at.

http://www.youtube.com/watch?feature...v=PXSG27mV2nk#!

Watch the injector mg/stroke stability as the rpm's go up and down from the live injector data

They are stable through the rpm range and all within +/- 1.3

**Mike1975** · 18th October 2012, 20:28

So as long as they are withing this range they are ok and as mine are not which injector would you say us down I thinking 2 and 3

**C-Owner** · 18th October 2012, 21:40

Originally Posted by Mike1975

So as long as they are withing this range they are ok and as mine are not which injector would you say us down I thinking 2 and 3

You should run the test as in the vid then decide, I would prefer to be there to make a decision on the live data rather on on here in this case to be honest.
PS: I would check #2 wiring replace the seal on #3 then run the test.

Vaux-com works with Win 7 32/64 bit

**plasma** · 18th October 2012, 21:46

Looks like no2 is the worst with the others looking ok, think the vx specs are +/- 1.5 . If no.2 is too far out then the others would try to compensate for it and throwing themselves out a bit... My bet is get no2 looked out or treated but I dont think this is the root cause of your problem though, symptoms would just be a little lumpy i think..