If you have changed CTS for a GM item, Rule that out. I would agree with funked FPR, Prob stuck and holding more pressure.

I doubt its the injectors.

i had a similar problem, swapped the fuel rain and injectors. ran mint ever since.

fucked cts will make it over fuel

scan it again and clear the codes, then disconnect the battery, I had a similar problem on mine and changed loads of bits just like you in the end i took the throttle body off and gave it a good clean and took the idle air control valve out and soaked it in brake cleaner for half hour, dried it off and re-fitted it and it was sorted straight away, ran like a dream :thumbs:

Dave

Yeah negative and leave for an hour then reconnect and dont rev it for 5 mins

diconnect the battery??

nope not yet ,whats best way to go about that

Have you tried resetting the ECU?

egr is blanked mate did it when i did the powerbox

Have you tried egr valve? Mine was over fueling and had rough idle, blanking egr valve sorted it out

ano but im at my wits end keith iv tryed pritty much everything

Your meant to be a mechanic :o :lol:

as i mentioned in a previous post my car started rough idling ,and i got 2 codes up
P1120 throttle control valve(broken tube)
P0170 fuel trim malfunction bank 1
now today i replaced the throttle position sensor ,and lambda ,and cleaned the plugs cuase as they were sooted to fuck ,but the car is still idling very rough and black smoke. now i know this is because off over fueling i also did a compression test and all cylinders were around 150psi.
i forgot to say its a corsa sport x16xe ,with a powerbox fitted i checked vacumm pipes there all ok ,iv replaced crank sensor,lambda,throttle position ,coolant temp,map,and im going to fit a idle control valve tomorrow.
so why is it over fueling so bad!! ???
fuel pressure regulator ??
injectors??
air temp sensor??
or somthing else??

Help please as i need my car and mpg isnt the best right now .

[Edited on 10-04-2011 by Ian]