Car wont start.

[shnazzle]

Not a feckin clue mate. Kudos for going at the pump yourself.
Rightfully so, why waste hundreds for something that might not work.

You might be best off taking it to a vw specialist, or possibly even a tuner. By nature they're a lot more into diagnosing imperfections in cars and actually enjoy it! A garage will just want to get shot of it asap and move onto the next car.

Might be an idea also to go through SEAT customer care.

 

[Dan FR]

I've missed most of your updates over recent weeks! :

Sounds like the new pump hasn't solved anything. I would expect the pump to get very hot after a long drive, it is attached to the engine after all.

Hot start problems only occur with slow crankin speed, so unless that's dropped below the threshold (cant remember the number now - 260rpm maybe?) then i doubt it's that.

Really haven't the slightest clue, how difficult was it to swap them over? Swapping back to the original would rule out any other causes and identify the pump as the cause

 

[STU3Y]

Thanks for replying guys, I think I'm going to wait til its left for a few days to see if it fails to start like before if it doesn't then ill prob try swapping old pump back.

One thing I noticed when fitting, is that there is a very small gap between the intake and the egr valve where the o ring is. I took it off and tried to refit but doesn't seem to seal properly. Could this be contributing? Should there be a gasket there aswell as an o ring

 

[Dan FR]

No gasket, just an o-ring that fits in a groove/cut-out (if its same as the older 1.9 engines?) I don't know the 2.0L setup very well though. If its leaking then it won't be helping but im sure you would hear a boost leak, or smell the exhaust gases?

 

[bpildesigns]

hi I know a bit late in this post hope all is fixed and ok.
The BKD engines do suffer with the heads cracking are u loosing any coolant at all the crack and leak coolant into the intake side of the cylinder head so no water leak will be seen on floor.

I have replaced a few bkd heads in the past if you do get a staring problem again, i would look into this.

i just saw that you said there is lots of white smoke that,s why I would be looking and if leaking over a couple of days prob would cause not to start

 

[STU3Y]

I haven't noticed any loss in coolant but will monitor this just in case. It's a frustrating problem as there are so many causes and seems to be most are trial and error at great expense which is what I'm trying to avoid.

 

[bpildesigns]

well if it is ok the next thing I would try is leave the coolant temp sensor unplugged as it will go to a basic setting if it thinks the car is colder than it is it will over fuel which will cause the white smoke your seeing to.

White smoke is either over fuelling or coolant.

so lets say not coolant, as its overfueling it is narrowed down allot,

1)coolant temp sensor reading to cold than actually is.

2)Maf sensor reading wrong thinking more air intake than actual.

3) unlikely but injectors could be leaking / faulty but I have only seen them fail not leak.

this is where i would start as the two sensors listed may not show a fault as working in there parameters.

If i was you try to start if problem unplug the coolant temp sensor if starts ok then thats your problem, if not then unplug maf sensor if then start then thats your problem.

try this and then let me know what the outcome is.

remember it is always repairable don't give up don't over think it

 

[shnazzle]

Haven't reviewed the past 200 odd comments but you have had it plugged into vcds right?

 

[STU3Y]

Haven't reviewed the past 200 odd comments but you have had it plugged into vcds right?

I don't have vcds or know anyone with it, so as silly as it sounds I haven't done it yet as hoped to narrow it down or resolve it before having to pay someone a fortune to do their scan and then the trial and error bit

 

[STU3Y]

well if it is ok the next thing I would try is leave the coolant temp sensor unplugged as it will go to a basic setting if it thinks the car is colder than it is it will over fuel which will cause the white smoke your seeing to.

White smoke is either over fuelling or coolant.

so lets say not coolant, as its overfueling it is narrowed down allot,

1)coolant temp sensor reading to cold than actually is.

2)Maf sensor reading wrong thinking more air intake than actual.

3) unlikely but injectors could be leaking / faulty but I have only seen them fail not leak.

this is where i would start as the two sensors listed may not show a fault as working in there parameters.

If i was you try to start if problem unplug the coolant temp sensor if starts ok then thats your problem, if not then unplug maf sensor if then start then thats your problem.

try this and then let me know what the outcome is.

remember it is always repairable don't give up don't over think it

Sorry I am a bit confused. Are you suggesting I unplug the CTS when the car fails to start or just when it is suffering with hot start and longer cranking?

Also where exactly is the sensor and how do I remove it?

Are you saying this could be the cause of the smoke OR the starting problem.

 

[Dan FR]

CTS is easily checked with VCDS which i thought had been done, MAF sensor won't play a part on starting the car, the ECU has seperate maps with set fuel values for starting the car. Injectors are unlikely, as you woudln't have all 4 leaking (it would fire up on 3 although sounding rough)

 

[shnazzle]

There are quite a few people on here with Vcds mate. Ask around, someone will be near you. Then it's easy enough to turn on logs for all of the sensors and run system checks. It will probably tell you pretty quickly what's wrong.
Thought this had been done.

It's like puking up and shitting blood for weeks and instead of going to a doctor, looking online.
Go see a doctor!

 

[STU3Y]

There are quite a few people on here with Vcds mate. Ask around, someone will be near you. Then it's easy enough to turn on logs for all of the sensors and run system checks. It will probably tell you pretty quickly what's wrong.
Thought this had been done.

It's like puking up and shitting blood for weeks and instead of going to a doctor, looking online.
Go see a doctor!

Any ideas where to buy a cheap copy?

 

[porksword28]

Flipping heck just get it scanned at a garage.

 

[Dan FR]

Any ideas where to buy a cheap copy?

here? http://www.aliexpress.com/item/Free...12-12-VAG-11-11-6-HEX-CAN-USB/1900353587.html

 

[STU3Y]

Flipping heck just get it scanned at a garage.

Chill, some of us don't have the money available to pay for the easy option

 

[STU3Y]

Thanks for the link Dan fr, i literally just took a chance on this one prior to seeing your link but will bookmark it just in case.
http://www.obd2tool.co.uk/wholesale/vag-cable-v12-12-0-new-version.html

 

[STU3Y]

Was trying again to reseat the egr and couldn't. So I'll be buying a new o ring over the next few days. Whilst off I decided to pull the CTS, not sure if anything wrong with it but going to replace it anyway to rule it out. Genuine is £40 from TPS pattern is £10 from ECP, however I ordered one from dark side developments for £20. Should arrive Wednesday so I'll update then.

Just want to say, I know some of you are fed up with my posts and have lost interest, and some think I should just pay someone to fix it, but like its been said its difficult to diagnose so could be expensive just to figure out what's wrong let alone fix it.

So far having done/doing the filters, tandem pump, CTS, vcds cable and gasket I've probably only spent the same as it would cost for a diagnostic without repair, so fingers crossed once the last bits arrive I'll find a solution.

All of your help is much appreciated.

 

[porksword28]

Chill, some of us don't have the money available to pay for the easy option

Surely you've spent £60 already on bits and bobs, getting it scanned isn't mega money

 

[STU3Y]

Give or take, but from all the threads I've read people have done that and its been inconclusive and they spend hundreds replacing random parts and paying labour each time still with no success due to the number of variables that could cause the same symptoms.

Plus this way I learn something myself and I'll have the bonus of vcds when it gets here. Added to that it gives you lot something to think about and may actually help someone who suffers the same problem at some stage. That's the benefit of a forum right!!