9th Aug 2012, 12:42

I have had my Vectra (3.0 V6 CDTi Elite Estate) for 3 years now. It has done me proud (considering it is GM).

The problems you guys have been having with your engines, which engines are they? I have the Isuzu twin cam 24 valve V6 engine in mine. The same engine as in the Isuzu pickup truck. I know Vauxhall have their own 3.0 V6 engine in some, and there is a rare quad cam engine too. Do we know which engines are having the problems?

Mines now done 93K; just under 20K with me. I've only had to change one suspension spring and upgrade my brakes (personal choice). I am however thinking of getting it chipped. Does anyone know of a good chip that isn't too expensive?

24th Dec 2012, 07:37

I have had 2 Vectra Elite V6 CDTi 3.0. It's a great long distance traveller. But the vibration problems happened on both. My 2006 car did nearly 40k miles before it broke all EGR valves and the fuel pump was replaced under warranty. This solved the problem due to a change of job. I sold the car at 45K. My second car, a 2008, had the same problem at only 20k miles. Same fix as I looked into the cost of the repair if needed again. It became apparent that the cost of the next fault would probably more costly than the value of the car.

P.S. The second one also had the auto box fail.

Great car, shame about the costly problems.

24th Feb 2013, 05:15

I also have the same Vectra as you. Did you end up getting a remap or a tuning box? Thinking about getting a tuning box for mine.

24th Mar 2013, 11:53

Hi, I have an unusual problem with my 3.0 CDTi.

It's all good mainly, however MPG has decreased from 44 around town to about 30. I know the cold might be affecting it a little, but it's developed a weird characteristic.

My fuel computer is normally quite accurate, and even from cold slowly shows fuel economy increasing, but as soon as my temp hits 80 degrees, the fuel computer starts to show MPG decreasing down to mid 20's, which is a near true reflection of MPG!

Performance is the same, nothing feels different, no smoke etc!

Once it's warm, if I turn off the ignition, then restart it, consumption then starts to improve again. It's as though the ECU has reset something?

I plugged in my obd reader and there are no faults showing??

Anyone got any ideas?

1st Apr 2013, 02:01

The Vectra V6 CDTi is the worst car I have owned.

21st Apr 2013, 13:33

I was just wondering if you had the swirl valves done, as I've got an 06 plate with the same problems. Just ordered a pipe at cost of 100 pounds.

Thanks, Craig.

7th Aug 2013, 17:17

I had same problem with 2006 Exclusive CDTi Vectra 1.9 (150). It was losing power under 2500 revs and I changed the vent flap pump for just below 600 pounds. I've heard of lots of other people with the same problems too. Be aware if you purchase an old Vectra. Take care.

3rd Jan 2014, 14:20

I had a 3.0l Vectra Elite Diesel Automatic on an 53 plate.

As far as the engine was concerned, I had no problems.

I had problems with other items such as the wipers packing up when the car was 3 years old, and front springs breaking.

There was one thing I didn't like about the engine, and it was a sort of rattling sound on the back of the engine, which we think was the alternator.

Other 3.0L diesels that I have heard have the same sound; for this reason I sold car after about 6 years of use.

26th Jan 2014, 09:44

Thank for your help, I took my Signum 3.0 CDTi to my local garage, they plugged it into the machine, and it said swirl flap/valve stuck open. Also DPF flagged up. He told me I am looking at about £800+. I thought there may be a cheaper solution, so did a search, and thanks to you I have found the problem, it was the intercooler top hose split. I have replaced it now for £36 for an after market hose. I then returned to the garage to have the car plugged in again and reset, job done. What a result, I was thinking about selling the car at a loss, as I could not afford to spend £1000 on repairs.

Many thanks for all your help, I cannot thank you enough.

Best regards John from Manchester.

17th Sep 2014, 15:16

I have to agree with this comment. I've got the 3.0L CDTi, but it's not just the engine that's rubbish; I hate everything about the car. The first Vauxhall I've ever had, and I will never buy another; I'd rather walk.

29th Jan 2015, 21:42

I think the garages are taking the hand outta us boys. I have an 04 Vectra 3.0 CDTi with 180k on her. The engine and gearbox have never been touched and she doesn't get it easy. Go buy a 1.9 CDTi to see what problems you have.

6th Apr 2015, 00:26

Hi mate. Where did you get the after market top hose? If I'm correct, this is the hard plastic pipe?

6th Apr 2015, 09:50

Could you tell me where you got the aftermarket top hose from? Do you have the link? I also have the same problem.

11th Apr 2015, 21:28

I might be well out of date here.

I have owned a Vectra C estate 07 3 litre V6 Elite, auto, since 12k miles and 18 months old.

It has been perfect until now, 2015, 135K on the clock. Just normal servicing and the odd hose, tyres and disks (a bit heavy front end braking). Even the cat is still okay.

Now, idle changes if you have your foot on the brake or not.

Going up gears, there is juddering and sometimes no selection, may rev to 3500 before changing, certainly no power at the time. Changing to manual helps, but not all time, and then it will not go into 6th even at close to 70mph (on manual).

It started a month ago, in a cold spell, and does not seem to happen when warmed up.

Now happens most days, only of course not on the day it was serviced a week ago, the engineer did not find any problems, even though the light came on and they cleared all faults? It was okay for a week, and now it's started all over again.

A mechanic friend has suggested an additive to the gearbox that cleans and coats it with a Teflon finish, which may help.

Any advice will be well received.

17th Apr 2015, 18:48

I got a top hose from Fleabay. About £30 for it.

27th Apr 2015, 11:45

Hi all. I have a 55 reg Signum 3.0 CDTi. It's awful; the electrics are terrible, my central locking is completely broke, my boot doesn't work after changing the button and mechanism, and it's now got a fault for the DPF, and the car keeps juddering when accelerating. And if I push it too hard, it goes into limp mode and I lose the turbo.

Anybody know how to resolve any of these problems, or know if anybody wants to buy one as spares or repairs? Cheers guys.

21st Sep 2015, 12:23

Intercooler top hose cured it for me as well. After reading this thread, I found a two inch split in the pipe. Changed it and it runs perfectly now.