Vivaro Power loss

Author
Discussion

crossy67

Original Poster:

1,570 posts

178 months

Sunday 9th February 2014
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Been half heartedly trying to sort this problem out for a friend for a while now but it's getting to the point where I'd like to sort it purly for the challenge.

2003 1.9 Vivaro revs really slowly until it gets to 2300rpm, like major turbo lag. Once over 2300rpm it drives completely normally, it won't even rev in neutral. I ave checked the fuel pressure via my scanned and it was low and unsteady, around 250-290bar. I changed the fuel filter and checked all the fuel lines for leaks, it's now about 300-320bar so good improvement there but still running the same.

The MAF sensor is goosed but I have tried swapping it with a known good one which made no difference, I have read lots of reports saying they don't make that much difference. I didn't reset the error codes when trying the new one but will do so as soon as I get chance to pinch one again to see if it makes any difference.

This looks to be a very common problem but one people don't seem to have been able to come up with a definitive answer to. Any body have any decent ideas please? I don't really want to go buying new bits all over the place, he hasn't got much money so I'd like to hit the problem first time.

Tampon

4,637 posts

224 months

Sunday 9th February 2014
quotequote all
Two things it might be.

1. clutch switch which stops it reving up when not in gear and foot on clutch they can go faulty, common problem, google that bad boy.

2. water ingress from dodgy scuttle seal drips on no.4 injector and electrics. You can see by trying to pull the injectors, if they won;t move or there is rust and gunk in the injection electrics box you might have to google Vivaro stuck injector for your next step.

Pop a update if you do get it fixed and how.

crossy67

Original Poster:

1,570 posts

178 months

Monday 10th February 2014
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Great stuff, something a bit different that makes a bit of sense too.

I shall have to go and take a look at the clutch switch in a few minutes. I changed the glow plugs over the weekend and noticed numbers 1 and 2 were really rusty, I couldn't change number one, it was stuck fast.

crossy67

Original Poster:

1,570 posts

178 months

Monday 10th February 2014
quotequote all
Just been out to get the van out for my friend and pu the scanner on it. The clutch pedal is working okay, the Solus it's seeing the clutch engage and disengage. I have read the cam sensor can cause problems too, would this cause these sort of problems? I can't see how the engine would run at all if the cam sensor was dead.

Disco_Biscuit

837 posts

193 months

Tuesday 11th February 2014
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Egr play up, unbolt it and rotate it 180 degrees effectively blankes it off.

Also check the pressure relief valve on the rail isn't leaking, remove the return pipe and check on idle and reving it, any fuel coming out its knackred

crossy67

Original Poster:

1,570 posts

178 months

Tuesday 11th February 2014
quotequote all
Nice one chaps, thanks a lot for the help.

I have ordered a MAF and air temp sensor, these are known to be not working. When I get it in to swap these I will check the pressure relief valve too.

Steve H

5,224 posts

194 months

Tuesday 11th February 2014
quotequote all
crossy67 said:
This looks to be a very common problem but one people don't seem to have been able to come up with a definitive answer to. Any body have any decent ideas please? I don't really want to go buying new bits all over the place, he hasn't got much money so I'd like to hit the problem first time.
There's lots of problems on these caused by lots of different things yes. If you aren't able to test things in detail then you are into guessing, swapping parts or getting someone in.

Tampon said:
Two things it might be.

1. clutch switch which stops it reving up when not in gear and foot on clutch they can go faulty, common problem, google that bad boy.

2. water ingress from dodgy scuttle seal drips on no.4 injector and electrics. You can see by trying to pull the injectors, if they won;t move or there is rust and gunk in the injection electrics box you might have to google Vivaro stuck injector for your next step.
Clutch switch wouldn't normal cause lag at low revs and the water ingress is generally on the later 2.0 engines.

Disco_Biscuit said:
Egr play up, unbolt it and rotate it 180 degrees effectively blankes it off.
EGR issues would make some sense, I thought these were held in with three bolts and couldn't be twisted but I may be wrong, worth popping out to see if it's stuck open anyway.

crossy67

Original Poster:

1,570 posts

178 months

Tuesday 11th February 2014
quotequote all
I have removed and checked the EGR, it was in great shape. I think it is held in with three bolts too.

Tampon

4,637 posts

224 months

Tuesday 11th February 2014
quotequote all
Steve H said:
Tampon said:
Two things it might be.

1. clutch switch which stops it reving up when not in gear and foot on clutch they can go faulty, common problem, google that bad boy.

2. water ingress from dodgy scuttle seal drips on no.4 injector and electrics. You can see by trying to pull the injectors, if they won;t move or there is rust and gunk in the injection electrics box you might have to google Vivaro stuck injector for your next step.
Clutch switch wouldn't normal cause lag at low revs and the water ingress is generally on the later 2.0 engines.
The clutch switch does have a effect on the revs at low speed and idle, tonnes of threads online about it ( one of many issues it can be)

The scuttle leak is common on all vivaro/traffics/primastars of all ages, the earlier they are (predominantly 1.9 engines) the more likely it is to effect them. they did a fix on later models quietly when they were in for servicing which mean a 2.0 model will have more chance of being "fixed" than earlier 1.9 models ( mine wasn't certainly) The 1.9 suffers especially as the drip that comes through seems to run perfectly into no.4 injector on the 1.9 engine layout.

Just for anyone who stumbles across this thread in the future here is how you can fix it yourself
http://www.vauxhallownersnetwork.co.uk/index.php?t...

As for the Egr vavles, they have three bolts but you can split the front and back and twist the front part 180 deg round so it looks liek the star of david and then bolt back through the hole on the back plate which keep the vavle in place blanked off and unable to move.



Should look liek this when finished


Edited by Tampon on Tuesday 11th February 22:29

ch427

8,854 posts

232 months

Tuesday 11th February 2014
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id try and find out the manufacturers specified fuel pressures first before swapping out any other components.

crossy67

Original Poster:

1,570 posts

178 months

Wednesday 12th February 2014
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Ahhh, I see regarding the EGR.

I have read the fuel pressure should be 293bar at tick over. The oil filter and bowl was clean with just a bit of sludge but no metal filings at all.

I am only changing the sensors that are known to have issues, the MAF is fixed at 6.3kg/h (I think, memory not the best) and there is an air temp sensor fault so as that sensor is only a few ££'s might as well do that too.

crossy67

Original Poster:

1,570 posts

178 months

Thursday 20th February 2014
quotequote all
Hi All.

Just a quick update. I replaced the air temp sensor, no change. didn't really expect there to be but as it was a fault code I thought best change it for the few ££'s it cost.

Today I received a new MAF sensor, I received a MAP sensor last week after the man on the phone miss heard me. Any way, installed the new MAF, reset the codes and bingo. It runs like a good un. This van has had this problem for 7 years!!!! I am dead pleased to have been able to sort this problem for a good friend.

Thanks all for your input, it's been very helpful.

Tampon

4,637 posts

224 months

Thursday 20th February 2014
quotequote all
Brillant, thanks for the update, gives me more arsenal when mine decides to play silly buggers.

crossy67

Original Poster:

1,570 posts

178 months

Friday 21st February 2014
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I think resetting the codes is a must though.

Dogmangeorge

4 posts

86 months

Friday 6th January 2017
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Hi guys new to this forum , vivaro problem no power at low revs , changed maf sensor no change , had new turbo also . All this started when cam belt snapped , had everything done to put right then this problem was told fuel pressure was low ???? Any ideas?

crossy67

Original Poster:

1,570 posts

178 months

Friday 6th January 2017
quotequote all
If you've replaced the MAF did you reset the codes?

Dogmangeorge

4 posts

86 months

Friday 6th January 2017
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Hi there were no codes come up and no lights on dash once the revs pick up it runs brilliant egr was cleaned also , doesn't hesitate on tick over either .

crossy67

Original Poster:

1,570 posts

178 months

Saturday 7th January 2017
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The MIL doesn't come on with a knackered MAF, you still have to reset the ECU.

Dogmangeorge

4 posts

86 months

Sunday 8th January 2017
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Thanks will get the ecu reset to see if it makes any difference cheers

Dogmangeorge

4 posts

86 months

Friday 17th March 2017
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Hi all sorry I haven't been about trying to sort this van , update is new egr new boost sensor new boost pressure solonoid , been on diagnostics fault codes are p0400 egr flow excessive p0100 mass air flow circuit low p0105 boost pressure sensor circuit low input p1125 accelerator peddle pos sys . ??? All new parts inc maf what the hell is wrong with this thing ? Do I have faulty maf ? Or is it ecu? Or is it broken wire from egr that would as I'm told affect all of these things inc fuel pressure valve ?