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[Andys VXR]

My revs are still not dropping inbetween gear change so if its doing 3 to 4000 revs and i change gear or come to a stop thats where they stay ( using gears to bring them down). Now ive done what some members said and thats clean all breathers out and throttle body. Ive got two codes come up which are 0120 and 0220 both throttle related what else can i do to fix this .

[albitz]

Checked for vacuum leaks ? Checked the throttle butterflies are fully closing ?

[albitz]

Looking at those codes - could be throttle potentiometer or something related to it at fault.Either have a tech2 session or replace it ?
Maybe someone more knowledgeable on electrical matters may have some more detailed/ accurate answers.

[Andys VXR]

how do i check the butterflys when on my drive at a stand still i can rev it and its fine only seems to happen when driving. ive checked breather pipes they seem ok 

[Andys VXR]

sorry im a bit daft whats a tech2 session and replace what

[albitz]

Tech2 is the GM diagnostics kit.A few people on here have them.Replacement - possibly throttle potentiometer,but best to get diagnosis really before throwing parts at it to try to find a cure.
If the butterflies are opening/closing ok when its revved up at standstill,then presumably they are ok.

[tango]

have you checked if all plugs wires are conected properly
there is a conector at the front of the plenum this controls your revs

[feeutfo]

Needs tech 2 to diagnose either throttle motor or pedal switch for the drive by wire.
Tech 2 being Vauxhall dialectic computer, which can activate various electric components remotely. Fairly sure there's a test for drive by wire throttle.

If I had to guess I'd go for pedal switch, although didn't you say pedal trick was not working at one point...?

[Andys VXR]

yes thats right but then i said i had plenium of so plugs were disconected because i was a burk . These were the codes after everything back  together

[RobG]

Servo to plenum hose securely fastened and airtight?

[feeutfo]

So codes could be historic then, could be an air leak as Rob suggests. Check your work. Is everything connected? Plenum seated correctly. Etc.

[Andys VXR]

this was also happening before i took plenium of to clean all breather pipes

[feeutfo]

Difficult over split threads mate...

[feeutfo]

Did you clear the codes at any point? We need to establish if they are current or from turning ignition on with dbw plug disconnected.

[Andys VXR]

Yes i cleared the codes with my little code reader but done the pedal trick after that and no codes are you saying take the wire of the throttle body