VAG 1.8T engine problem.

[( |-| |2 ][ $]

Can anyone help me attempt to diagnose a problem with my Leon 1.8T 2004

I'm currently raging as I took a day off work to give it too the local stealers to fix, only for me to hear at 5pm that their "diagnostics machine is broken and can they have it over night".

Anyway the symptoms:

- On cold start the secondary pump doesn't come on, otherwise it behaves fine.
- After that is runs perfectly for my journey.
- After stopping (and turning off the engine) it takes a few extra turn-overs to start, then runs with a high idle as if it's running rich for 2mins then it's all good again.
- No engine lights

I think the coolant temp sensor might have failed. (am a right in saying the one for the dash gauge is separate (because that works fine)

Your thoughts?

 

[( |-| |2 ][ $]

Just changed the CTS, I tried a start after a run and it started much better but still idles a little high (for a short period) and stutters when blipping the throttle. (I think running rich). I've had the car 8 years, it never used to be like this.

So the CTS has seen an improvement but it's clearly not the problem. (still no secondary air pump from cold also).

Thanks to others for your replies, in response, yes coil packs changed 2 years ago via recall.

Will book it in an indy for vag com check.