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?

Sent from my HTC One using Tapatalk

Immo? Do you have both keys?

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

did this happen after the work you have undertaken?

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

Sent from my HTC One using Tapatalk

Was the MAF genuine VAG?

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, 201610 yr by pauldazzle

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

Sent from my HTC One using Tapatalk

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

Sent from my HTC One using Tapatalk

Did you try unplugging the CTS too?

Edited 16 May, 201610 yr by pauldazzle

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

Sent from my HTC One using Tapatalk

Cts

Sent from my HTC One using Tapatalk

Do you have access to VCDS?

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.

Sent from my HTC One using Tapatalk

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.

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

No fuel