2.0 m20 - problems

[lanceyboy]

HELP!!!!!
engine misfire when cold, settles when warm although still not full power and looses all power/struggles past 5k

changed the following;
-Plugs (new part)
-leads,cap and rotor - changed
-fuel filter - changed (new part)
-checked fuel pres reg by sucking on vaccum
-tested and cleaned up cps
-tested injectors(electrically) resistance test-fine and all are clicking
-AFM - changed
-lambda sensor - changed (new part)
-blue sensor - changed (new part)

im sure theres more that ive changed or tested but cnt think just now

shes running far too rich, dumping way too much fuel into cylinders resulting in excessive fuel consumption 10-15mpg on motorway run. not good!!!
any other options,ecu??

[town325i]

Check the wiring under the inlet manifold that may of corroded away causing the blue temp sender reading not to get to the ECU

[lanceyboy]

ok will do, is that the multi plug?
cheers

[town325i]

yes mate a black one right in the middle cant miss it

[Brianmoooore]

It's not so much the plug that needs checking, but the condition of the wires in the rubber boot under the plug. Water gets trapped in it, and corrodes through the wires at the back of the plug.

[Silverfang]

Could be Crank Position Sensor?

[lanceyboy]

thanks for the pointers guys, im working away this week so get onto it at weekend and i'll update my progress on here. say it is completely corroded, will i need a complete loom to sort?

[lanceyboy]

Hi folks, update....
checked multiplug for corrosion under manifold, checked continuity through the plug using multimeter on buzzer mode and all getting a good connection.
any other options? ecu? what about a faulty ignition coil? I remember working on a v6 and the coil was breaking down when warm causing huge power loss and nasty misfire...mine is down on power all the time from cold and gets slightly better when up to temp but still missing and returning crappy mpg 10-15.
HELP HELP HELP HELP HELP HELP HELP HELP HELP HELP lol