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[rocky daytona]

hi everyone hope someone can help just brouight a 2003 2.6 v6 cd auto full service history car has developed a misfire and no power espescially under load have changed the plugs still the same will rev up inpark with slight misfire if you try to drive of it will go but you have to feather the throttle if you put your foot down it trys to stall once you get it moving you can drive it but with no real power gearbox appears to be changing up and down  put it on diagnostics it read oxygen senser and multiple misfires on numerous cylinders anyone got any ideas i read that the coil packs are troublesome please help if you can thanks

[Welung666]

Any air leaks from the air box towards the plenum? Does the ICV need cleaning?

[cem_devecioglu]

it seems to be a sensor problem but lambda sensor is not the cause

I think, lets see the other comments..

ps trying with the maf sensor unplugged will give more idea..

[rocky daytona]

excuse my ignorance what is an icv  and do you think it worth changing the coil packs thanks

[Big_Mart]

On the 2.6 it will be either the airflow meter or coil pack(s)
what was the exact fault code?

[cem_devecioglu]

excuse my ignorance what is an icv  and do you think it worth changing the coil packs thanks

Idle Air Control Valve..

[Mr Skrunts]

Hi, welcome to the forum.  

[rocky daytona]

not sure what the code was it just said oxygen senser then multiple misfires on different cylinders the garage said change the plugs as the oxygen senser may be showing because of the misfires the engine management light was taken of and hasnt come back on but it still has a misfire and no power you can rev it when stationary in park and overcome the misfires but it is still lumpy and lacking a sharp pickup

[Big_Mart]

try disconnecting the air mass meter then start the car is the fault the same? :question

[ffcgary1]

Check very carefully around the cam covers for oil leaks first, then check for oil in the plug wells and then if all good check the Heater by pass valve at the rear of the plenium on the drivers side, for leaks or signs of past leakage, oil or water on the DIS pack will fuber the dis and this will cause the problems that you describe.

[Essex_Andy]

Almost deffo ht leads.

With the recent cold snap and damp it will cause this problem.

Just, IMHO, wasted money on maf and dispack. (readings with multimeter across new dis pack and old dispack were the same)

New set of ht leads from Europarts and all good.

For £50-ish you can get a mobile diagnostic tuner to visit you and check all items.

Wish I had done that BEFORE buying a DIS pack and MAF

Diagnostic on all sensors if they are fine then 99.9% ht leads

[Jay w]

Almost deffo ht leads.

With the recent cold snap and damp it will cause this problem.

Just, IMHO, wasted money on maf and dispack. (readings with multimeter across new dis pack and old dispack were the same)

New set of ht leads from Europarts and all good.

For £50-ish you can get a mobile diagnostic tuner to visit you and check all items.

Wish I had done that BEFORE buying a DIS pack and MAF

Diagnostic on all sensors if they are fine then 99.9% ht leads

Andy this is a later car with coil packs.....

admin would it be worth merging this and the other thread together?

[albitz]

I would try disconnecting each coil pack individually to narrow it down rather than buy a whole set.

[dbug]

Welcome to OOF m8