ibiza cupra running rich

[crack5111]

my car is running rich and im not sure where to start as there are no fault codes on the ecu and it could be the coolant temp sensor,air flow meter or lambda probe?the only other thing i could think of is ive made my own de-cat pipe and ive unplugged and removed the second sensor.i was just wondering if this could cause it even tho i did the de-cat quite a while ago and its only started running rich and using lots of fuel? cheers

 

[turbo009]

Could be a list of things. When was it lat serviced?

 

[crack5111]

ive recently put four new beru coil packs and a set on ngk iridium plugs and ive done oil and filter recently and i fitted a cold air induction kit a little while ago so i wouldnt of thought it would be anything to do with that

 

[turbo009]

You had this on vagcom? could be maf,lambda sensor ? Any more info on this? or you sorted it ??

 

[PhilW]

How do you know its running rich?

Sure theres no fault codes because of the decat? I bet you get an EML soon.