vacuum leak or air problem???

Post by **sambagis** » 29 Nov 2006, 20:38

Im new to this forum but have high expectations after reading some of the posts and answers. I have a 1.9L vanagon that is not working properly. Thought that it must be a vacuum problem so have made sure that all the lines are in the correct places but am still experiencing some strangeness. Basically the engine will not start at all once slightly warm. First crank in the morning starts right up. After that first start it wont fire at all, but if I take off the injectors from one side of the engine and crank it the thing starts right up. I can then put the injectors right back on and it runs fine but if I try and kill it and start again it will not start. Im guessing that this means that there is an air problem but I cant figure at all where or what to start looking at. Any ideas on what could be happening to make this occur??

Cheers,
Stephen

Post by **kevtherev** » 29 Nov 2006, 20:52

Hello and welcome to the forum sambagis..

1.9L injection...erm are you sure?

Post by **sambagis** » 29 Nov 2006, 21:12

Hi Kevtherev,
Yep! 1.9L injected. Can not figure what the heck might be going on.

Post by **kevtherev** » 29 Nov 2006, 21:18

Whats your location pal...would it be over the pond

Post by **sambagis** » 29 Nov 2006, 21:29

what made you guess that? Of course, dont you know yanks cant speak the language correctly

Seriously though, seems like your web forum for these VWs is much better than the ones that I have been following here. Was hoping that I would get a better responce to this question.

Stephen

Post by **kevtherev** » 29 Nov 2006, 21:33

you will... there are some good fellers on here that know about injection systems more than I.

Post by **sambagis** » 29 Nov 2006, 21:55

I hope your right. Should I think about reposting this thread so that the people that know this system will look at it again and not think that this traffic is from us working out the problem. What is the best method for getting responces??

Thanks,
Stephen

Post by **kevtherev** » 29 Nov 2006, 22:04

patience my friend... some of the guys and gals who can help will be along

Why not say hello in general chat,

and say you have a problem posted in technical and could do with some help

Post by **sambagis** » 29 Nov 2006, 22:13

will do.

Thanks for the polite welcome.

Stephen

Post by **sambagis** » 29 Nov 2006, 22:28

I would have thought so as well but this question has received no responce. I would have thought that someone would have at least taken a shot at it but nothing. I was supprised as well. Also found that all of my searches for topics that had any similarities yielded little to nothing except at this forum where I found some info related but not quite all that I was hoping for. Any way, thanks for the welcome.

Stephen

Post by **HarryMann** » 30 Nov 2006, 01:32

Im new to this forum but have high expectations after reading some of the posts and answers

Welcome Sambagis, stress us all out and put us on our mettle from day one, eh

Getting down to it, just to say there's a few fairly clued up guys not posting that often just at the moment, but let's get a few things ironed out - symptom-wise in preparation.

[Ed]

It won't start after the first cold start. Right?

How long does it run then?
How does it run until it stops (or you cut it)?
Rhythmic (rich) idlle?
Uneven (weak) idle?
Picks up OK?
Smoke (if so, colour, quantity)?
How cold is cold where you are at the moment?

When you try to re-start it what does it do?
Not turn over on the starter or very slowly?
Spin over OK but not catch and run?
Tries to fire but won't pick-up?
Smokes a lot but won't fire?
Other?

Does it have an MV injection system with lambda (O2) probe?
When did it start to first exhibit these sysmptons and what was the first sign of something amiss?

The drift you can probably tell is towards it running excessively rich > dripping/leaking injectors or an injector wiring/earthing fault or an ecu fault.

Thanks for your considered answers...

Post by **Ye Olde Syncrospares** » 30 Nov 2006, 10:03

1.9i is the engine they got over their,sounds like the same problem golfs suffer from,it could be the temperture switch that switches off the extra fuel for the cold start cycle has failed,this means even when warm itll be trying to start with extra fuel thereforte flooding it,find your wiring diagram and find this switch and simply pull the connector off and try to start when hot,cj.

Post by **ghost123uk** » 30 Nov 2006, 11:56

SYNCROSPARES UK wrote:1.9i is the engine they got over their,sounds like the same problem golfs suffer from,it could be the temperture switch that switches off the extra fuel for the cold start cycle has failed,this means even when warm itll be trying to start with extra fuel thereforte flooding it,find your wiring diagram and find this switch and simply pull the connector off and try to start when hot,cj.

Flip - My F.I. Rocco used to do exactly this, for all the 8 years I had it.
It would fire up after a good cranking.
It's gone to a new home now, but I wish I had known this then

Post by **sambagis** » 30 Nov 2006, 21:45

Hey HarryMann,
Sorry to put you on the spot right off but seems like you all are a good bunch to put under pressure. In answer to your questions-

How long does it run then?
RUNS UNTIL I KILL IT

How does it run until it stops (or you cut it)?
RUNS OK BUT SOUNDS A BIT UNEVEN

Rhythmic (rich) idlle?
Uneven (weak) idle?

Picks up OK?
YES, IT PICKS UP JUST FINE

Smoke (if so, colour, quantity)?
NOT SO MUCH, A BIT OF WHITE/BLUE SMOKE, HARD TO SAY

How cold is cold where you are at the moment?
I LIVE IN HAWAII AT ABOUT 500M SO YOU CAN GUESS WHAT COLD MEANS.

When you try to re-start it what does it do?
JUST CRANKS WITH NO MENTION OF A FIRE UP, SMELL PLENTY PETROL

Not turn over on the starter or very slowly?
Spin over OK but not catch and run?
Tries to fire but won't pick-up?

Smokes a lot but won't fire?
NO SMOKE

Other?

Does it have an MV injection system with lambda (O2) probe?
DONT THINK SO BUT UNSURE, WHERE WOULD THIS BE LOCATED?

When did it start to first exhibit these sysmptons and what was the first sign of something amiss?
TRUTH IS THAT THIS IS A NEW BLOCK. THE OLD ONE THREW THE #3 PISTON ARM. AFTER THE REBUILD IT RAN FOR ONE TEST DRIVE AND WOULD RESTART BUT THEN STARTED WITH THIS PROBLEM. SOUNDS LIKE THE ISSUE SYNCROSPARES UK DESCRIBES COULD BE IT. I WILL TRY AND FIND OUT IF THERE IS THAT TEMPERATURE SWITCH HE DESCRIBES. OTHERWISE IF THE ABOVE DETAILS GIVE YOU ANY OTHER IDEAS PLEASE LET ME KNOW. THANKS ALL FOR YOUR TIME AND INSIGHTS.

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