Blobeye surging.

[MK4 Slowride]

My car started surging the other day then next morning it flicked up an EML warning. Had it coded and it was saying it's a vacum leak near the manifold. So I've had it smoke tested etc but not found any fault. I know if I run the car for circa 30 minutes when it's hot it'll start to surge again, makes a knocking from the bottom end plus a ptsh noise (like an injector hiss & not the boost pressure release valve).

Has anyone come accross this before, car is a 2.0i turbo blobeye 53-plate 60,000 miles. It's really annoying as I know there's a fault and I can't find what it is yet I need to replace. Also the car is doing proper ste on fuel like 20 miles 1/4 tank and I'm not hoofing it.

Depressing I love my car but it's poorly.

[JollyGrnMonster]

Fuel pressure reg vac hose off
Vac hose to oneway valve / purge solenoid off
Crap after market dumpvalve fitted?

[sparkyhx]

boost leak somewhere
turbo - exhaust leak
Checked your blugs - are they black

Fuel consumption issues sounds like you are overfueling and that usually down to an air leak soemwhere.

What do you mean by surging - accelarating on its own?

[MK4 Slowride]

No, the car will feel as if there's a fuel block so normal power then nothing very quickly changing if that makes sense. When at idle it almost stalls but then keeps going.


I'll get it in the workshop and check these things. Car's been fine since but I've not really gone far so will take for a spank next day off and hopefully can get the fault to arise again.

Cheers.

[sparkyhx]

stalling is another symptom of an air leak in the intake side

[MK4 Slowride]

Still haven't found anything and the cars been working fine, must have fixed itself.

As you probably know, this means the car will suffer a terminal fault quite soon.

[stuart-b]

True in most cases but not all. Years ago my dad had an Audi Coupe (old school), one day, it started using more and more oil.

Then... accelerating from a roundabout, I saw a huge ploom of oil smoke from the rear.

Actually accelerated even better at that point.

Got back, expected it to sh*t itself at any moment. Rings clearly shot to pieces.

Then something strange happened.

Stopped using any oil for the next X thousand miles.

Did the engine rebuild fairy come along? Nope.

Actually, it terminated itself when the big ends went, so perhaps this wasn't such a good story to tell

[MK4 Slowride]

Cars, like people get ill, get better, then die.

My scoob has only just done 60,000 miles and has FSH including all the body checks and brake fluid changes so I'd be shocked if it did go pop. Still if it does I'll sell it back to myself and get an R34 Skyline.