Rev3 Turbo - low on power

[jcurtis6183]

Hi Guys,

The tubby has suddenly developed an issue where the power isn't locking in until higher revs than normal.

When the power comes in its strong as normal but there is definitely a delay, almost like lag.....any ideas on what could cause it?

[2mad]

Knock sensor chiming in ... have you done ecu codes

As a ps. knock sensor is the gate keeper for power

[simpson_eh]

if the knock sensor is gone then there is no power no matter what the revs ? all sound no go

that whats happened to me, check for codes onthe ecu

[jcurtis6183]

Thanks guys. It feels like it's holding back basically around 2.5 - 3k revs then kicks on.
The power is all there beyond that point.

I was thinking maybe an air leak? It's not consistent, sometimes worse than others.

[jon]

Check all ignition components, plugs, dizzy cap, rotor arm, leads, coil, igniter etc...

[2mad]

Thanks guys. It feels like it's holding back basically around 2.5 - 3k revs then kicks on.
The power is all there beyond that point.

I was thinking maybe an air leak? It's not consistent, sometimes worse than others.

Arr gotcha .. tbo in my car not much happens before 3.5k but im sure you know your car better than me .. test you bov thats a good place to start , remove the valve a blow into it if it cant handle lung pressure its goosed .. and look for boost leaks too .. but to me no power under 3k sound right .. its sometime hard to diagnose over the internet with out seeing the car ... best of luck mate .

And ps. checking your ignition systems up to pars a great idea

[rgb]

id check the wastegate is not stuck open.

[2mad]

id check the wastegate is not stuck open.

For lack of power at higher rps's yes but what op seems to be describing is low off boost power .. this is a new one on me ... hope he sorts it

[rgb]

when your at high revs your wastegate is open

[2mad]

Yes .. wastegate open stops the turbo from spooling properly and you really feal it at higher rpms.

Its well worth checking if you have a footpump and some vac line you can attach to it

[2mad]

Foot pump test vid .. http://vid948.photobucket.com/albums/ad ... e_test.mp4