Rough Idle When Warm

[jonnyturbo 3]

ok after changing numerous things on my engine (list below) i went back to the car when cold and started it, ran fine when cold but after idleing at around 1.2-4k revs it settled down a bit less then original idle and started running rough. popping from the exhaust, smoking from the exhaust after a while which gets worse the longer its ran. revving the engine it pops and bangs too, and last of all its smoking a little tiny bit with a bit of pressure behind it too out of one of the oil filler cap holes which is atm open.

engine is a 2.0 8v turbo xu10j2te

changed so far:

 

spark plugs/leads

coil pack

coolant temp sensor

idle control valve

different throttle body

different set of injectors

ignition module

ecu

pipe going from throttle body to ecu

compression test shows all pots are fine, water isnt mixing with oil at all neither.

sprayed some carb cleaner around the tb/inlet and vacuum pipes and nothing at all.

 

tried to do a search but search isnt working for me

 

HELP! please as im going out my mind now trying to figure this out!

Edited April 20, 2011 by jonnyturbo

[welshpug 1,657]

try the lambda sensor.

[jonnyturbo 3]

what prices am i looking at for one?

[jonnyturbo 3]

ok found a new bosch lamba sensor for £65 on ebay so i guess its one of the last things i can try and hope it works!

[jonnyturbo 3]

started the engine today from cold and revved it a few times but was boggin down and backfiring etc, unplugged the tps and the engine started revving up so put my thumb half way over the icv to bring the revs down, it then revved with no problems, would the tps cause it to run like this? dont want to spend more money on something that wont fix it?