I have a Vectra DI Nov'96 registered, but '97 model with a problem. It has 38K on it and just started to get the electronic management light on when doing 5 - 15 mph. I accelerate and it goes again. However I have also been getting power loss which felt like no turbo (couldn't acc in 4th or 5th) for 2 weeks, then it came back fully for a day, then 1/2 went (acc slowly in 4th & 5th) then went again. I took it into Vaux dealer where it indicated the MAF sensor was faulty, that was changed - no difference so old one went back. Its now erratic, I travel 50 miles to work, sometimes ok 1/2 way sometimes all the way, sometimes nothing!
Any clues appreciated.
The archive talks about power loss at 70mph, but mines at all speed, and computer just says MAF.
Cheers, Ant.
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Forgot to mention, for the 1st 2 weeks of failure there was no noise, now sometimes it has a turbo whistle with no power, sometimes no noise. and sometimes a little whistle - all random and mixed with partial or no power.
Thanks, Ant.
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Update to my powerloss.
Dealer used computer to decide it was the MAS and replaced it - no difference, and couldnt think of anything else! Another garage tested all sorts and decided it was the turbo as after removal found the blades stiff, I had this replced, with little difference, but did find the turbo oil feed blocked. Now it's at a diesel specialist who is replacing some seals under the crankshaft to do with the injectors. This was when I said the car wouldn't start after parking on a incline/hill. It's a common problem with them shrinking apparently only a 4-5hr job but this MIGHT also cure the power problem!
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If during your loss of power your ECU light is NOT on, then I have exactly the same fault/problem. Some mornings when I start up and pull away, the engine is completely gutless (feels like no turbo), no ECU light on. Other mornings, it is just fine and the turbo pulls like a steam train. I have discovered that if I am able to 'coast', with the gears in neutral, down the l-o-n-g hill (plenty of roadworks so nice and bumpy) on my morning route, then 9 times out of 10 the fault will have disappeared. If I go a different route, and/or don't do the 'coasting', then the fault will remain for the whole of my 55 mile journey. Equally, I have noticed that if the engine is running fine, and I go over a pothole/speed bump then the fault has a tendency to re-appear. Vauxhall dealer 'diagnosed' low oil level, and charged me £36 for the privilige of diagnosis and oil top-up. Needless to say, they were barking up the wrong tree.
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EGR Valve?
MG-Rover Questions? forums.mg-rover.org/
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i have heard of a problem like this before. on this car it was caused by the injector leak off pipes fracturing where they go down deep into the head. maf sensor is most common on this application though. i would check all loom connectors for tightness and corrision as obviously its a electrical fault.
has this engine got an electronic boost control solinoid.
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EGR Valve - Exhaust Gas Recirculation Valve.
It's part of the emission control system, ripped from the new Haynes Manual, Vectra Mar 1999 - May 2002 (3930):
This system is designed to recirculate small quantities of exhaust gas into the inlet tract, and therefore into the combustion process. This process reduces the level of unburnt hydrocarbons present in the exhaust gas before it reaches the catalytic converter. The system is controlled by injection system ECU, using information from various sensors, via the EGR valve on the upper section of the inlet manifold. The EGR valve is vacuum operated and is switched on and off by an electrical solenoid valve.
Kind regards,
Cyrill666
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Hello Cyrill. Can you let me have more information. I have 1999 vectra diesel. Had from new only 50k. Coming back from holiday the engine light came on. As being disabled, I started to worry so I called the AA. They said it could be egv valve, but said it would ok to carry on. I noticed lack of power on hills. Can you please give me any advice?
tnx phil
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hi ant ive got a 2.0 dti estate on R ,i had the same problems about 12mts ago and it drove me potty.i tried every thing i did all the checks even fitted a new air flow meter but nothing changed ...... i eventually found the fault and it was related to the air flow meter ..i peeled back the insulation on the multi pin plug & disscovered a corroded (ferdigree) terminal i changed this and the torque was unbelivable .so check out the terminals and accosiated wiring best of luck .. i no what it feels like . steveh67
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Follow up, Final one I hope.
Had the Mass Air flow Sensor replaced (computer detected)
No Difference, replaced old one
Had Turbo replaced (detected in service)cleared turbo oil tube blockage,
Little difference, high revs better but no low end grunt.
Replaced injector jets seals as not starting on hills.
Starts on hills now but still no power.
Had Mass Air Flow replaced again (computer still showing fault)
No difference
Had ERG replaced (leak manually found)
Yippee - got power back - much better. Not been able to check 50-80 yet but it pulls in 5th from 30 :-)
£1300 to find and fix. Oh well - anyone want a '96 Vetra DI with 50K on it ;-)
Thanks for all your help, Ant.
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Hello ant123,
Glad your sorted, shame about the carry on and cost though! One question, when you say "it pulls in 5th from 30" what do you mean by pulls? Are we talking significant power or acceptable power?
I'm trying to gauge the performance of my 1999 di, in 5th it takes around 17 seconds to get from 30 to 50 - how does that compare to yours?
Cheers,
Cyrill666
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Hi mate still got your vectra, mine has same fault.
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I would now (done a few since, isn't hindsight wonderful?) go for the EGR valve first then the MAF sensor next. Often just disconnecting the EGR valve is enough - sometimes it doesn't work, depending upon what position it has failed in. I cured a rather smoky and flat Pug 306 DT last week in this manner. Customer was very happy, to say the least!
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How much are these EGR valves pse? and is it easy DIY
regards,
Alf
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your problem and all problems similar to this are due to the carbon from the recirculation of the exhaust gasses into the inlet manifold which in turn block not only the primary ports of the manifold but also the secondary ports which are opened via butterfly valves as you increas speed,leading to insufficient air intake.the problem with the light on the dash is very lightly due to the egr valve being held open from mass carbon deposits...the bad news is that if U only clean out the carbon from the manifold it is only a 12month fix but it returns the car to full power and better economy
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