Before I take the car in to be looked at and no doubt be fobbed off!

 

I have a vrs diesel and over the last few months I have noticed its taking longer to start up

this is every time not when its warm or cold ....just gone to move car and I would say it turned over for 10secs at least before it started,,,just wondering if anybody else had this problem,

 

Mine does exactly the same, service due soon so will mention when it goes in. Also hesitates occasionally when driving 40-50mph.Had it in twice for that and couldn't replicate.

My current Leon FR 184 does both of the above. It's been discussed on seatcupra.net too at length. Seems to be a "characteristic".

Hm, I have the CR150 with DSG (MY2014) and sometimes starting is awful, too.

I mean 5 starts out of 10 is okay (instant) but the other 5 takes about 2-5 seconds.

The longest start was 7-8 seconds so far (80k kms on the clock).

We have 3 Octy 3 at the company (with same engine) and all of them have this issue.

It sounds like the engine doesn't get enough fuel for starting...

During theese longer startings sometimes the engine fires 1 or 2 times (tries to start) but fails and the starter motor just keep on spinning.

On other days just 2-5 secs of "dry" spinning till the engine starts.

Stupid for such a good car. :(

Does it do this when using Start-Stop, leaving you stuck at the front of a queue of traffic?

No issues in start/stop mode as I remember (I don't like the system and disabled it).

When you go to the garage ask them about resetting the injector learning parameters in the ECU.

Problems like this are usually due to injector drift (wear of the small components) resulting in less fuel being injected than the ECU is requesting.

Good ECU suppliers should have software routines which try to normalise this behaviour by compensating for injector aging.

...then something is wrong with the factory settings as the problem is here since the beginning. Nothing changed in the first 80k kms...

Yes, it could well be a bad software/calibration or wrong configuration of the injectors if you have had problems from the start.

Usually injectors has a QR-style barcode which is scanned & entered into the ECU showing the characteristics of each injector.

If these are not entered, are swapped or the injectors as changed this can also cause problems.

 

A modern engine should not take more than 2s to start (and should be much faster) in normal ambient conditions above 0°C.

Same problem been top the dealer several times. No luck with a fix I am afraid.

Yep my 150 TDI Elegance estate does this. Its been investigated twice (once by two different dealers) and no fault found

Its only failed to start once and Ive kust come to accept its a characteristic....though not a v good one!!

I noticed this on mine after about 12 months. Was starting to take longer to start up with the occasional time taking much longer, 8-10 seconds. At first I would wait longer from turning on the ignition to starting, thinking it may be the weather and heater plugs needed a bit more time but this made no difference.

 

I decided to try some Diesel Rhino (not for the starting reason, just thought I try it out after reading a post on here a while back) and this 'quirk' seems to have gone completely now. Perhaps some premium diesel may have the same effect?

Yep my MK 3 VRS diesel estate does this most days but only at the end of the day after work. It's almost as though the ignition 'program' has a stutter and can't quite start the engine properly. Asked local dealership to investigate on recent service but no fault found. Weird one this. Never known this on any other car I've had.

Mine does this randomly but mostly with cold engine.

I am wondering whether it is related to the fuel pump? I have the hissing noise.

Mine does this randomly but mostly with cold engine.

I am wondering whether it is related to the fuel pump? I have the hissing noise.

 

Problems with fuel presure should be easy for the dealer to see with a data logger if its possible to reproduce the issue (perhaps VCDS or an OBD scan-tool could do this as well).

The fuel rail presure should rise almost instantly when the starter motor is engaged & follow closely with the setpoint.

Any deviations can be due to fuel supply from the low-pressure pump or perhaps the high-pressure pump itself.

I work at a Mercedes dealership. This is very common on the new generation of diesels.

Injector tolerances are that fine, the internal injection needles begin to wear.

That's when they need to be zero calibrated.

I work at a Mercedes dealership. This is very common on the new generation of diesels.

Injector tolerances are that fine, the internal injection needles begin to wear.

That's when they need to be zero calibrated.

 

Especially with those Delphi injectors...