No start no hope

[Lenrod]

02 auq vrs. Not throwing any fault codes, Replaced maf, Vac lines coils

,plugs, fuel pressure regulator, crank and cam sensors. Walbro is whirring away behind me. Earths are good. Checked spark all good. Injectors working . Car went from 40mpg to not starting. Anyone any useful ideas?

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[ThomasItis]

Immo? Do you have both keys?

[HeavyMetalRich]

Does it turn over and attempt to start or not even try to turn over?

[SuperbTWM]

did this happen after the work you have undertaken?

[Lenrod]

No only 1 key but the immobilized light is not on. Car will start every 30- 40 trys idled for 4-5 seconds shakes violently and dies. All this work is since Fri evening after the car let me down. Sai deleted. Fuses are all good

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[pauldazzle]

Was the MAF genuine VAG?

[pauldazzle]

I'd try starting it with MAF unplugged, & also try the same with the Coolant temp sensor.

When were the air & fuel filters last changed?

Edited 16 May, 2016 by pauldazzle

[Lenrod]

Maf is Bosch 57i kit cleaned 2000 km ago. Maf unplugged makes no difference fuel and oil filter 2 months old walbro pump just in a year. Cat is a hi flow into a 2.5 single box setup. Stage 1, forge tip samco boost hoses and a cold side dump relocation. Genuinely stuck scratching my head

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[Lenrod]

Not loosing coolant burns about 500 ml of oil every 1000ks.

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[pauldazzle]

Did you try unplugging the CTS too?

Edited 16 May, 2016 by pauldazzle

[Lenrod]

Vrs was replaced in Jan from black to green running at 90 before issue no difference when unplugged.Car won't bump start either

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[Lenrod]

Cts

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[pauldazzle]

Do you have access to VCDS?

[Lenrod]

Had it scanned twice with a Delphi diagnosis system. Going to have it towed to my mechanic on Friday as at this stage it's frustrating me. He has vag com but faults coming up are for low voltage when I removed the battery and headlight levelers low current.

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[pauldazzle]

You can't just rely on fault codes for some of the VAG engine sensors. CTS & MAF in particular are notorious for failing without throwing codes. You really have to use VCDS/Vagcom engine measuring blocks for proper diagnosis.

[ThomasItis]

Keep us informed! I hope your mechanic can do something...

[G-slave]

No fuel